D 1 . 1 - Pr o p o s i t i o n o f a t e s t i ng p r o t o c o …...c e r t i f i c a t i o n o f...

FINAL DELIVERABLE

Date : 30/04/2018 Business Owner : Clémence DEVILLIERS Department : ALAT / IS-Eu

D1.1 - Proposition of a testing protocol for certification of existing and future HRS

Disclaimer: “The information and views set out in this report are those of the author(s) and do not necessarily reflect the official opinion of the FCH 2 JU. The FCH 2 JU does not guarantee the accuracy of the data included in this study. Neither the FCH 2 JU nor any person acting on the FCH 2 JU’s behalf may be held responsible for the use which may be made of the information contained therein.”

D1.1 - Proposition of a testing protocol for certification of existing and future HRS This document is • PUBLIC

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AIR LIQUIDE FINAL DELIVERABLE

Abstract: This document is the final deliverable of Task 1 of the tender N° FCH / OP / CONTRACT 196: “Development of a Metering Protocol for Hydrogen Refuelling Stations”. Objectives of Task 1 were specified as follow:

- Forming a working group or task force with the relevant national institutes, representing a minimum of 3 Member States out of the main countries where HRS are operated;

- Coordinating the efforts to develop a testing protocol for the temporary approval of flow meters and HRS; - Obtaining agreement from all participants within the first 4 months of the work on said protocol; - Ensuring that this simplified protocol achieves the proper balance for the following requirements:

- Cost effectiveness - Confidence in its reliability and its accuracy - Feasible to implement as easily as possible (simplicity of equipment and time)

All the work performed in Task 1 and associated outcomes / conclusions are reported here. Résumé: Ce document est le livrable final de la Tâche 1 de l’étude N° FCH / OP / CONTRACT 196: “Développement d’un protocol de comptage pour les stations de remplissages hydrogène”. Les objectifs de la tâche 1 étaient définis comme suit:

- Former un groupe de travail avec les instituts nationaux concernés, représentant au minimum 3 état membres parmi les principaux pays où des stations H2 sont opérées,

- Coordonner les efforts pour développer un protocol de test pour l’approbation temporaire des débitmètres et stations H2,

- Obtenir un accord de tous les participants dans les 4 premiers mois de l’étude sur ledit protocole, - S’assurer que ce protocole simplifié respecte le parfait équilibre des exigences suivantes ;

- Rapport coût-efficacité - Confiance dans sa fiabilité et sa précision - Facilité de mise en oeuvre (équipement et temps)

Tout le travail réalisé dans la Tâche 1 et les résultats / conclusions de l’étude sont présentées dans ce livrable.


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Table of contents

1 Executive summary 4

2 Scope and objectives 6

3 Abbreviations 6

4 Protocol for an accelerated certification of existing and future HRS 7 4.1 Principle 7 4.2 Requirements for the Type Evaluation 9

4.2.1 Requirement applicable to the calculator 9 4.2.2 Requirements applicable to the meter 10

4.3 Requirements for the Initial Verification 12 4.4 Summary table 14

5 Organisation of test campaign in Task 2 15 5.1 Certification of the testing equipment 15 5.2 Proposed HRS to be tested in Task 2 16 5.3 Specific constraints / requirements 19 5.4 Data to be recorded 21 5.5 Planning 22

5.5.1 Expected planning for testing one HRS 22 5.5.2 Global planning for testing different HRS 24

5.6 Conclusions / Summary 25

6 Link with several stakeholders in Europe for task 3 26 6.1 Contact with the MetroHyVe project 27 6.2 Contact with other Institutes in Europe 27

7 Milestones 28

8 Conclusions / Next steps 29

9 Appendices 30


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1 Executive summary English version: This deliverable summarizes the outcomes of the Task 1 of the tender N° FCH / OP / CONTRACT 196: “Development of a Metering Protocol for Hydrogen Refuelling Stations”. In this Task, several sub-contractors were deeply involved:

● National Metrological Institutes: ○ PTB (Physikalisch-Technische Bundesanstalt) in Germany: Dr Rainer KRAMER ○ LNE (Laboratoire national de métrologie et d'essais) in France: Mr Christophe BRUN ○ NMi Certin in the Netherlands : Mr Erik BEUMER

● Laboratory expert in gaseous flow metering: ○ LNE-LADG / Cesame Exadebit s.a. in France: Dr Rémy MAURY

The active participation of all partners was mandatory to make a detailed assessment of the situation (i.e. gaps between different OIML standards) and to propose adapted requirements for each sub-assembly of the measuring system (i.e the meter and the calculator) taking into account operational constraints. The work was organized as follow:

➔ In total over the 4 months of this task, 3 face-to-face meetings were organized: ◆ at Air Liquide facilities in Sassenage for the Kick-off meeting: November 8th & 9th, 2017 ◆ at LNE in Paris for the 1st progress meeting: December 12th, 2017 ◆ at NMi Certin in Dordrecht for the 2nd progress meeting: January 23rd, 2018

➔ In addition, two intermediate phone calls took place to review the list of actions and review this final deliverable, in order to get comments from everyone.

In few words, several standards, according to which meters and calculators used to be approved, have been reviewed, and gaps with OIML R139:2014 requirements were highlighted (see §4.2 and 4.3). For each requirement, it has been decided if additional tests were required, or not. The rationale is given in the document. A summary table is given in §4.4. All HRS manufacturers can now refer to it, in order to know what is required to proceed to the approval of the dispenser. In parallel, a preparation work of Tasks 2 & 3 of this tender has been initiated:

● Task 2: Realization of a test campaign in Europe: ○ Several HRS have been selected in Germany, France and Netherlands to perform this test

campaign ○ Installation on site has been imagined including site configuration and safety aspects. ○ A detailed planning has been proposed for testing each HRS: 1 week seems necessary to perform

all tests. ○ A global planning has been proposed assuming a starting date in April 2018. As it depends on the

beginning of Tasks 2 & 3, this planning will have to be reviewed. ● Task 3: Dissemination work

○ Contact has been made with several other Institutes in Europe and with partners of the MetrohyVe project, to present of objectives of the tender and convince them to be involved in Task 3


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French version: Ce livrable résume les résultats et conclusions de la Tâche 1 de l’étude N° FCH / OP / CONTRACT 196 “Développement d’un protocol de comptage pour les stations de remplissages hydrogène”. Dans cette tâche, plusieurs sous-traitants ont été fortement impliqués:

● Instituts Nationaux de Métrologie: ○ PTB (Physikalisch-Technische Bundesanstalt) en Allemagne: Dr Rainer KRAMER ○ LNE (Laboratoire national de métrologie et d'essais) en France: Mr Christophe BRUN ○ NMi Certin aux Pays-Bas : Mr Erik BEUMER

● Laboratoire expert en débitmétrie gazeuse: ○ LNE-LADG / Cesame Exadebit s.a. en France: Dr Rémy MAURY

La participation active de tous les partenaires était nécessaire pour faire un état des lieux de la situation (c’est-à-dire lister les écarts entre les différentes normes OIML) et pour proposer des exigences adaptées pour chaque sous-ensemble du système de mesurage (c’est-à-dire le compteur et le calculateur), en prenant en compte les contraintes opérationnelles. Les travaux se sont déroulés de la manière suivante:

➔ Au total sur les 4 mois qu’a duré la Tâche, 3 réunions en face-à-face ont été organisées: ◆ à Air Liquide à Sassenage pour la réunion de lancement: 8 & 9 novembre 2017 ◆ au LNE in Paris pour la 1ère réunion d’avancement: 12 décembre 2017 ◆ au NMi Certin in Dordrecht pour la 2ème réunion d’avancement: 23 janvier 2018

➔ De plus, deux réunions téléphoniques intermédiaires ont eu lieu pour revoir la liste des actions et le livrable final, afin de recevoir les commentaires de chacun.

En quelques mots, plusieurs normes, selon lesquelles les compteurs et calculateurs sont habituellement approuvés, ont été passées en revue, et les écarts aux exigences de l’OIML R139:2014 ont été mis en évidence (cf. §4.2 et 4.3). For chaque exigence, il a été décidé si des essais complémentaires étaient nécessaires, ou non. Les justifications sont indiquées dans le document. Un tableau de synthèse est donné au §4.4. Tous les fabricants de stations H2 peuvent donc s’y référer afin de savoir précisément ce qui est attendu pour procéder à l’approbation du dispenser. En parallèle, un travail de préparation des tâches 2 & 3 de l’étude a été initié:

● Tâche 2: Réalisation d’une campagne d’essais en Europe: ○ Plusieurs stations H2 ont été sélectionnées en Allemagne, France et Pays-Bas pour exécuter cette

campagne d’essais, ○ L’installation sur site a été imaginées, incluant la configuration des sites et les aspects sécurité ○ Un planning détaillé a été proposé pour les essais sur chaque station: 1 semaine semble

nécessaire pour réaliser tous les tests. ○ Un planning global a été proposé en supposant une date de démarrage en Avril 2018. Etant donné

que ce planning dépend de la date de démarrage des Tâches 2 & 3, il devra être revu au début de celles-ci.

● Tâche 3: Travaux de dissémination: ○ Des contacts ont été pris avec plusieurs autres instituts en Europe, ainsi qu’avaec les partenaires

du projet MetroHyVe, pour leur présenter les objectifs de l’étude et les convaincre de participer à la Tâche 3.


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2 Scope and objectives The objective of this study is to define, in agreement with European national metrological institutes, a structured approach for accelerating the certification of metering systems for HRS in Europe. This certification is required for invoicing hydrogen at Hydrogen refueling Stations (HRS) to the general public. In the European countries where the roll-out of the hydrogen infrastructure has started (for instance, in Germany), the authorities require a prompt implementation of metering systems compliant with national regulation; without such certified metering systems, the construction of new stations could be stopped in the coming years. For this reason, it was critical to define a temporary certification process for HRS before a revised version of OIML R139 is issued. Even if this revision is expected for beginning of 2019, it will take time to change the legislation in each European country accordingly. Therefore a temporary solution is needed to ensure compliance of existing and future HRS with respect to legal aspects. This is the main objective of the tender: FCH / OP / CONTRACT 189 “Development of a Metering Protocol for hydrogen refueling Stations”. The participation of three Metrological Institutes was mandatory for the success of this Task. By consequence, PTB / LNE / NMi have been subcontracted by Air Liquide to define a common approach for the certification of hydrogen stations. This approach is presented in details in part 2. The second part of Task 1 was to prepare the work in Task 2 and 3, in order to start quickly at the beginning of the contract. That is why contact has been made:

- with H2 Mobility for the testing of HRS in Germany (Task 2) - with the MetroHyVe project and other European Metrological Institutes for involvement in Task 3

This is reported in part 3 and 4 respectively.

3 Abbreviations

HRS Hydrogen Refueling Station MID Measurement Instrument Directive

OIML “Organisation Internationale de Métrologie Légale” (International organization of Legal metrology)

WELMEC Western European Legal Metrology Cooperation

MPE Maximal Permissible Error MFM Mass Flow Meter

MMQ Minimal Measured Quantity EMC Electromagnetic compatibility


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4 Protocol for an accelerated certification of existing and future HRS

4.1 Principle In order to establish a testing protocol for the certification of Hydrogen Refueling Station (HRS) in waiting for the revised version of OIML R139, the following reasoning has been applied:

● Main components of the measuring system (calculator and meter) must fulfill requirements of OIML R139:2014;

● However, most of them are not approved according to OIML R139:2014, but according to the previous version of OIML R139 (2007 for example) or according to different standards (R117-1 for liquid meters for example);

● Therefore deviations to OIML R139:2014 for these components (in their certified version) have been evaluated for each category of tests required for the Type Approval:

○ Electromagnetic compatibility (EMC) ○ Environment testing (climatic test, humidity, etc). ○ Accuracy tests ○ Gas temperature accuracy tests ○ Durability tests ○ Software (WELMEC 7.2)

Based on the results of the aforementioned evaluation, decision was made to require, or not, new or additional tests. This evaluation has been done:

- for future stations that will be installed according to this protocol (before the revised version of OIML R139 is issued), on the one hand;

- for existing stations already installed and in operation in Europe, on the other hand. The testing protocol and associated requirements are explained below. A summary table is proposed in part 2.4.

IMPORTANT REMARKS: 1. Even if this protocol has been developed with and endorsed by the three National Institutes involved in

Task 1 (PTB in Germany, LNE in France, NMi in the Netherlands), it must be validated by each National Authority for application in their respective country: AGME in Germany, “Bureau de la Métrologie” in France, and the Dutch Authority in the Netherlands. This validation in each country is not in the scope of this tender. However, contact has been made with the National Authorities at beginning of Task 1 to inform them about this on-going study.

2. In France, a request has been made to “Bureau de la Métrologie” in order to get an national validation of a

legal framework in 2018 for Hydrogen dispensers, in waiting for the revised version of OIML R139, based on the proposed approach. Therefore, it might be that the testing protocol hereunder could be validated in France before summer 2018.

3. In the Netherlands, hydrogen dispensers are already mentioned in the national legislation “Regeling

nationaal autonoom geregelde meetinstrumenten”. However the wider maximum permissible errors applicable to hydrogen dispensers (mentioned in the revised version of OIML R139) are not yet


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implemented into this national legislation. When the draft revised version of the OIML R139 is agreed on in the OIML R139 working group, the Economic Affairs of the Netherlands will start in parallel the implementation of these wider maximum permissible errors into the national legislation. First agreement of the draft in the OIML R139 working group is expected to be within 3 months and the final approval of the new version of the OIML R139 is expected to be approved in the CIML meeting in October 2018.

4. In Germany, hydrogen fuel dispensers which are approved in accordance to the OIML R139 are accepted

by the responsible authorities for legal metrology. The verification administration of the “Länder” (states of Germany) coordinate the activities in the AGME (working group of verification authorities in Germany). The AGME is still accepting HRS which are not approved and verified now, but the AGME is urging the operators to achieve a legally correct status of the HRS. If a type approval for the HRS is issued then verification authorities will carry out the initial verifications and the re verifications using certified test equipment like the HTB of company Air Liquide. After the update of OIML R139, the new defined MPE will become valid in Germany. But also for old stations a solution in respect to a kind of approval is needed. This is still under discussion. Station which not fulfil Class 4 (see definition §3.3) need to be upgraded because the MPE in service are quite high for this class.


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4.2 Requirements for the Type Evaluation In this Section, requirements for Type Evaluation of existing stations and future stations are defined for the main parts of the measuring system: calculator and measuring device. 4.2.1 Requirement applicable to the calculator Note: Here the word “Calculator” stands for “Calculating and indicating device” Existing calculators may be certified according to:

- OIML R139 : version 2007 or 2014 (“Compressed gaseous fuel measuring systems for vehicles”) - OIML R117 : version 2007 or 2014 (“Dynamic measuring systems for liquids other than water”)

Here is the result of the assessment of deviations to OIML R139:2014:

➔ Electromagnetic compatibility (EMC): Future stations must be compliant with the stricter EMC requirements defined in the 2014 versions (of OIML R139 and R117). Therefore: For future stations:

- if the calculator is approved according to OIML R139:2014 or OIML R117-2:2014: No test required - if the calculator is approved according to OIML R139:2007 or OIML R117-1:2007: Additional tests are

required: complementary tests to comply with stricter requirements of OIML R139:2014: - Radio-frequency electromagnetic fields (see Table 20 of OIML R139-2:2014(E))

→ Frequency range increased from 2 to 3 GHz - Surges on signal, data and control lines (see Table 24 of OIML R139-2:2014(E))

→ Already covered for R139:2007(E) and higher test level needed for R117-1:2007(E) - DC mains voltage dips, short interruptions and voltage variations (see Table 26 of OIML

R139-2:2014(E)) → New for R139:2007(E) and already covered for R117-1:2007(E)

- Ripple on DC mains power (see Table 28 of OIML R139-2:2014(E)) → New for R139:2007(E) and already covered for R117-1:2007(E)

For existing stations: No test required whatever the certification of the calculator (providing it is certified according to the standards mentioned above). It is tolerated that old calculators, certified according to old standard versions, may be used for HRS already in operation (applicable to France and Germany) Specific remark for Netherlands: For existing stations installed before November 2016, “No test required” is accepted if the dispenser has been properly functioning. After November 2016, it seems that “Additional tests” would be required (because Dutch legislation refers to OIML R139 and MID).

➔ Environment testing: No test required whatever the certification of the calculator (providing it is certified according to standards mentioned above)


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➔ Mechanical test (vibration): No test required, whatever the certification of the calculator (providing it is certified according to standards mentioned above)

➔ Accuracy tests: No test required whatever the certification of the calculator (providing it is certified

according to standards mentioned above)

➔ Gas temperature accuracy tests: No test required

➔ Software (WELMEC 7.2): For both future and existing stations:

- if the calculator is approved according to OIML R139:2014 or OIML R117-2:2014: No test required. Requirements shall be in accordance to applicable chapter of OIML (R139-1:2014 Annex A) or to WELMEC guide 7.2.

- if the calculator is approved according to OIML R139:2007 or OIML R117-1:2007: Additional tests may be required: The equipment shall be conform to WELMEC 7.2 and covering, especially the software identification on the display. If there is no display, a sticker is acceptable. And if the software identification is not available, a software update is needed.

➔ Durability tests: No test required

4.2.2 Requirements applicable to the meter Note: Here the word “Meter” stands for “Measurement sensor and transducer (electronics)” Existing meters may be certified according to:

- OIML R139: version 2007 or 2014 (“Compressed gaseous fuel measuring systems for vehicles”) - OIML R117: version 2007 or 2014 (“Dynamic measuring systems for liquids other than water”) - OIML R137: version 2012 (“Gas meters”)

Note: Meters which are tested according to OIML R137 shall be suitable for hydrogen in the pressure and temperature range applied for HRS. However, the signal cable connected to this meter transmitting the data to the calculator shall at least be covered by EMC tests (see below), and data transmission shall be protected by double pulse signal or digital communication (covered by Extension T of WELMEC 7.2). Here is the result of the assessment of deviations to OIML R139:2014:

➔ Electromagnetic compatibility (EMC): Future stations must be compliant with the stricter EMC requirements defined in the 2014 versions (of OIML R139 and R117). Therefore: For future stations:

- if the meter is approved according to OIML R139:2014 or OIML R117-2:2014: No test required - if the meter is approved according to OIML R139:2007 or OIML R117-1:2007 or OIML R137:2012: Additional

tests are required: complementary tests to comply with stricter requirements of OIML R139:2014: - Radio-frequency electromagnetic fields (see Table 20 of OIML R139-2:2014(E))

→ Frequency range increased from 2 to 3 GHz. → Already covered by OIML R137:2012.


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- Surges on signal, data and control lines (see Table 24 of OIML R139-2:2014(E)) → Already covered for R139:2007(E) and higher test level needed for R117-1:2007(E) and R137:2012(E)

- DC mains voltage dips, short interruptions and voltage variations (see Table 26 of OIML R139-2:2014(E))

→ New for R139:2007(E) and already covered for R117-1:2007(E) and R137:2012(E) - Ripple on DC mains power (see Table 28 of OIML R139-2:2014(E))

→ New for R139:2007(E) and already covered for R117-1:2007(E) and R137:2012(E) For existing stations: No test required whatever the certification of the meter (providing it is certified according to standards mentioned above). Specific remark for Netherlands: For existing stations installed before November 2016, “No test required” is accepted. After November 2016, it seems that “Additional tests” would be required (because Dutch legislation refers to OIML R139 and MID).

➔ Environment testing: No test required whatever the certification of the meter (providing it is certified according to standards mentioned above)

➔ Mechanical test (vibration): No test required if the certification class is M1, and whatever the certification

of the meter (providing it is certified according to standards mentioned above). If the meter is located in the dispenser, M1 class is enough. If the meter is located in the station (near the compressors), higher class might be necessary (M2?). This working group thinks nevertheless that M1/M2 certification of sub-assemblies could be not sufficient. Influence of vibrations due to compressors on meter accuracy needs to be further evaluated. Proposition is made to put an accelerometer on the flow meter during test campaign in Task 2, in order to determine the vibration characteristics:

- If vibrations have no effect : No test would be required - If vibrations affects the accuracy of the flowmeter: then it shall be tested for M2 including accuracy

check during vibrations in laboratory, or relocated somewhere else in the station (another proposal is to use a shock absorbers).

➔ Accuracy tests: Complete new tests whatever the certification of the meter (providing it is certified

according to standards mentioned above) It has been agreed to perform the following tests on site (during Initial Verification for future new stations or during a dedicated test campaign for existing stations, see Part 3.3):

● Two full fillings: 20-700 bar ● One partial filling: 20-350 bar ● One partial filling: 350-700 bar ● One filling at MMQ (1kg) 1

This serie of tests shall be performed three times.

➔ Gas temperature accuracy tests: No test required, but under conditions. Here difference is made between future new stations and existing stations already installed:

1 For the 3 first HRS, MMQ will be tested twice: from 20 to MMQ, and from (700-MMQ) to 700 bar. The worst conditions will be retained for next HRS


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For future stations: If temperature tests are available for the applicable temperature range, no test is required. BUT if not, temperature tests must be performed (with H2 or other gases) at least at the most critical flow rate range (i.e. the low flow rates) For existing stations: If accuracy of H2 in-service tests on site is inside acceptable limits (Class 3 - 5%), then no additional temperature tests are required. If not, temperature tests as mentioned above are required.

➔ Software (WELMEC 7.2): For both future and existing stations:

- if the meter is approved according to OIML R139:2014 or OIML R117-2:2014 or OIML R137:2012: No test required. Requirements shall be in accordance to applicable chapter of OIML (R139-1:2014 Annex A) or to WELMEC guide 7.2.

- if the meter is approved according to OIML R139:2007 or OIML R117-1:2007: Additional tests are required: The equipment shall be conform to WELMEC 7.2 and covering, especially the software identification on the display. If there is no display, a sticker is acceptable. And if the software identification is not available, a software update is needed.

➔ Durability tests: No test required It has been agreed that no durability test on the meter was required, but more frequent reverifications on site is proposed instead. Frequency has to be adjusted for each country: it is advised that frequency be in between 6 months and 1 year. 2

If a large drift is observed during a periodic inspection (more than ½ * MPE), then the flowmeter must be replaced or recalibrated. Verifications results to be shared on a regular basis with the National Metrological Institutes. Note: If the manufacturer provides a lifetime estimation (as mentioned in OIML R139 Rev 2018), then the meter shall be replaced after the estimated lifetime, or a longer lifetime shall be demonstrated.

4.3 Requirements for the Initial Verification For the Initial Verification on site, it has been agreed that Complete new tests were required. It consists in verifying the complete measuring system. For that, at least five hydrogen accuracy tests must be performed:

● Two full fillings: 20-700 bar ● One partial filling: 20-350 bar ● One partial filling: 350-700 bar ● One filling at MMQ (1kg)

This serie of tests shall be performed three times. Acceptance criteria: The Maximum Permissible Errors has been reviewed by the Working Group involved in the revision of OIML R139. During the revision meetings, Class 2 and Class 4 have been defined, by all partners, for hydrogen service. Here is an extract of the official document of the OIML working group:

2 The National Authorities may decide on the time interval for Periodic Verifications


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First Committee Draft OIML/2CD R139-1 Date: 17 November 2017 Reference number: TC 8/SC 7/p7/N031

After the first serie of tests, an adjustment of the meter is possible. In that case, it shall be verified that the measuring system would have been capable of fulfilling the full set of requirements with the new adjustment by restarting tests and/or recalculating errors obtained before adjustment if the corresponding tests are not performed again ( OIML R139-2:2014 §2.2.4). For a new HRS, the check list of OIML R139-3:2014 shall be filled in to check the conformity markings and belonging documentation. For existing HRS it is highly advisable to do it as well.


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4.4 Summary table How to read this table ? For the calculator and the meter, choose the column corresponding to its actual certification. Then for each category of tests, refer to the legend below:

1 = Complete new tests 2 = Additional test required 3 = No test required 4 = No test required, but under conditions

Remark : This table apply for future stations that will be certified according to this protocol, but also to existing stations. When requirements differ between future and existing stations, the number specified into brackets applies to existing stations. Note: Table 1 below is a visual summary. For details, please refer to the corresponding explanations in parts 2.2.1, 2.2.2 and 2.3.

Calculating & indicating device

Measurement transducer (electronics) & Measurement sensor

Certified according to:

OIML R117-1:2007 or OIML R139:2007


OIML R117-2:2014 or OIML R139:2014


OIML R117-1:2007 or OIML R139:2007 or OIML R137:2012


OIML R117-2:2014 or OIML R139:2014

Type approval tests

EMC 2 (3) 3 2 (3) 3

Environment testing (climatic test, humidity) 3 3

Mechanical test (vibration) 3 if M1 3 if M1

Accuracy test 3 1

Accuracy gas temperature tests 3 4

Software (WELMEC 7.2) 4 3 4 3

Durability test 3 4 (3)

Initial verification Adjustment on site 1 1

Table 1: Summary table of the proposed testing protocol


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5 Organisation of test campaign in Task 2 This part specifies the technical specifications required to organize the test campaign on different operational HRS in Europe in Task 2.

5.1 Certification of the testing equipment One important milestone at end of Task 1 was the approval of the testing equipment to perform the test campaign of Task 2. All documentation about the functioning of the trailer was sent to PTB beginning of October 2017 for an official approval of the equipment. A detailed and complete review has been done by Dr Kramer (PTB). The evaluation report was sent to Air Liquide at beginning of January and reviewed with all participants during the face-to-face meeting in Dordrecht. The uncertainty budget has been finalized as well. It reaches the requirement of OIML R139:2014, i.e. 1/5*MPE = 0,3% if Class 1.5 is applied or 0,4% if Class 2 is applied (see Table 2 below).

Quantity filled Relative expanded uncertainty of the testing equipment

Criteria if Class 1.5

Criteria if Class 2

0,5 kg 0,44 % 0,6% 0,8% For MMQ, criteria is 2* ⅕ * MPE

1 kg 0,27 % 0,6% 0,8%

2 kg 0,20 % 0,3% 0,4% For other quantities, criteria is ⅕ * MPE

4 kg 0,18 % 0,3% 0,4%

Table 2: Outcomes of the uncertainty budget So provided the trailer is operated according to the report written by PTB, Air Liquide testing equipment is accepted as a reference test bench which can be used to determine accuracy of HRS. The certificate has been issued by PTB on March 26th 2018. Next steps are as follows:

- Based on the final report and the documentation, LNE and NMiI will provide a letter confirming their agreement with the evaluation report made by PTB, and their acceptance of the trailer as a reference test bench : mid April

Document references: Bericht_AirLiquide_H2Prfstd_2018-03-26.pdf Report_AirLiquide_H2Prfstd_2018-03-26_frontpage_00206BA1EE0A180329173723.pdf


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5.2 Proposed HRS to be tested in Task 2 This part consists in the selection of several HRS in Europe to carry out the test program as defined and agreed in Task 1, with the Fuel Cell & Hydrogen Joint Undertaking. As required in the tender specifications, this test campaign “should involve a statistically significant sample of HRS in Europe, representing a minimum of 3 Member States”. Criteria for selecting the HRS to be tested are the followings:

1. All technologies and/or specificities should be tested 2. HRS from different manufacturers in Europe: Air Liquide, Linde and H2 Logic (NEL) 3. HRS in operation in minimum 3 different countries of the European Union

For Air Liquide, HRS technology is based on compressed gas. Nowadays, three generations of stations have been designed:

- G1 station: one big-size container and one dispenser - G2 station: several small-size containers and one dispenser - G3 station: one medium-size container and one dispenser.

Generations G1 and G2 are already in operation in Europe. For these two designs, the mass flow meter (MFM) is located in the station (container), which can be far away from the dispenser. It is foreseen that this piping length has a strong (negative) influence on the accuracy. So the two extreme configurations must be tested: one HRS where the dispenser is close to the container, and one HRS where this distance is long (typically 50 m). The last HRS generation (G3) is not installed yet in Europe. But the mass flow meter has been moved to the dispenser. So smaller errors are expected. The Conformity Assessment of the dispenser is planned end of January at Air Liquide testing facilities, and is out of scope of this tender (which focus on existing HRS). For Linde, two different technologies of HRS are in operation: compressed gas and liquid hydrogen. These two generations are used equally. No information is known on the location and model of MFM used. For NEL (H2 Logic), only one technology of HRS based on compressed gas is in operation. No further details are known. Consequently, it is proposed to test in Germany:

- 2 HRS of Air Liquide: one with long distance between the dispenser and the container, and one with a short distance;

- 2 HRS of Linde: one of each technology; - 1 HRS of NEL / H2 Logic.

Furthermore, to fulfill the first selection criteria, it is planned to test as well other stations in Europe: France and Netherlands for example (these countries thus correspond to the National Institutes involved in Task 1), see Table 3 below.


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LOCATION START-UP

DATE TECHNOLOGY PROVIDER

OPERATOR CHARACTERISTICS (especially for metering aspects

PRIORITY Country City

Germany

Offenbach Air Liquide H2M German national funding - Air Liquide G1 design

3

Kamen (or Limburg)

May 2017 (for both)

Air Liquide H2M Air Liquide G2 design with short distance between the MFM (in the station) and the dispenser

1

Wolfsburg (or Bad Rappenau)

Aug. 2017 / June 2017

Air Liquide H2M Air Liquide G2 design with long distance between the MFM (in the station) and the dispenser

1

Wuppertal (or Pforzheim)

Linde H2M Compressed gas

1

Munich Linde H2M Liquid 1

Rostock (or Bremen)

NEL - H2 Logic

H2M Compressed gas

1

France

Orly airport (or CRPS)

Oct. 2017 Air Liquide ALAB FCH2-JU funded project: H2ME1: G2 design

2

Sassenage / / / Air Liquide G3 design tested at Sassenage testing facilities

Out of tender scope

Netherlands

Rhoon (Rotterdam)

Apr. 2016 Air Liquide ALAB Air Liquide G1 design

2

Belgium Zaventem (Brussels)

Air Liquide ALAB

3

Table 3: List of possible station to be tested, and associated priority order Legend: 1 = Absolute priority

2 = Selected to fulfill the 3rd criteria listed above (HRS in 3 different EU countries) 3 = Backup solutions if needed


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Here are some pictures of the different HRS listed above :

AL station - Kamen AL station - Limburg

AL station - Wolfsburg AL station - Bad Rappenau

Linde station - Munich Linde station - Wuppertal


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NEL station - Rostock

AL station - Paris (Orly) AL station - Rotterdam (Rhoon)

For German HRS, contact has been made with H2 Mobility. As the main operator of the stations, their support for the organization of such a test campaign is essential, and their approval for HRS selection and for the planning is mandatory. Tests will be performed by Air Liquide with the technical support of CESAME for instrumentation and data recording. It is planned that people from the three Metrological Institutes involved in Task 1 (Dr Kramer PTB, Mr Brun LNE and Mr Beumer NMi) attend the test campaign in their respective country (at least 2 stations for Germany). And if possible the one person representing the National Authority will be present during the tests as well.

5.3 Specific constraints / requirements Once installed on site, the trailer must imperatively remain in place (from Monday afternoon to Friday morning) in order to perform test strictly in the same conditions, and avoid any additional errors that may disturb the results. However, the station must remain available for customers during that time. One possibility could be to shift slightly the trailer (as proposed on the drawing below), in order to let a customer fuel his car as well. Remark: The receptacle of the nozzle is on the left side of the tank (/trailer). Most of FCEV (Hyundai, Mirai) are filled on the left side as well.


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If needed a hose of 5m long can be provided to replace the standard hose, and be able to fill a trailer and a car without moving the trailer. Remark: the standard length of hose is 3m. With a longer hose, errors should be higher (more hydrogen vented at end of fueling). So using a 5m hose seems conservative. Acceptable but not the prefered solution. In this case, an estimation of the extra vented quantity (due to a longer hose) must be calculated. This installation will depend on each site and must be well prepared ahead of the test campaign with HRS operators. Figure 1 presents a sketch of one possible configuration of the experimental setup for the tests.

Figure 1: Drawing of a possible implementation on site (need to be adapted for each site)

For the functioning of the trailer, the following utilities are needed:

- 230V power supply - 200 bar nitrogen bundle - Grounding connection

Provided by the HRS operator: Provided by testing team:

- Power supply: one electrical plug is enough (two if possible).

- 200 bar nitrogen bundle: will be delivered on site with the testing equipment (trailer)

- Grounding clip

Table 4: Utilities needed for the functioning of the test bench, and responsible party.


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It is expected as well that one operator from H2 Mobility be present during the test campaign to ensure a technical assistance in case of problem.

5.4 Data to be recorded Based on Part 3 of OIML R139 “Report format for type evaluation”, the following data must be recorded (see Table 5):

Data Measured by HRS (Y/N)

Comment

Atmospheric pressure (Patm) - optional

NO Generally not measured on HRS, but Cesame Exadebit will provide a meteorological station to record Patm, wind force and direction, ambient T.

Ambient temperature (Tamb)

YES Data / recording to be provided by the HRS operator (will be compared to the ambient temperature measurement made by Cesame Exadebit).

Pressure of HP buffers YES Data / recording to be provided by the HRS operator

Gas temperature YES Usually, measure is made at the outlet of the dispenser Data / recording to be provided by the HRS operator If MFM is located in the warm area: put a temperature sensor onto the pipe

Accelerometer NO Equipment provided by Cesame Exadebit. Must be EX zone 2 compliant. Installation on or near the flowmeter to measure vibrations from the station (compressors). If the flowmeter is insulated, the accelerometer maybe be positioned at a place which is representative (as much as possible) Recording by Cesame Exadebit. Installation by the operator (with help of Cesame Exadebit). Access to the flowmeter is required!

Flow rate YES Data / recording to be provided by the HRS operator

Injected mass (scale) NO Reading on the scale

Time measurement YES Data / recording to be provided by the HRS operator with other measurements

Pressure of the receiver tank (Ptank)

NO Reading on the manometer

Pressure in dispenser YES Usually, measure is made at the outlet of the dispenser Data / recording to be provided by the HRS operator

Table 5: List of parameters to be recorded during the test campaign (for each HRS)


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In summary, the HRS operator must be able to provide a recording of the following parameters during the tests (fueling) :

- Time measurement - Ambient temperature - Pressure of HP buffers - Gas temperature at the outlet of the dispenser - Pressure at the outlet of the dispenser - Flow rate: 4-20 mA signal and its belonging parameter settings + recording of pulse signal (if possible)

Note: As a minimal requirement, Min and Max values can be recorded manually. But a continuous recording during the fueling operations is preferred. The best would be to get these data on a USB key at end of tests. The report should mention where the MFM is located before or behind the heat exchanger and the pressure control valve, in order to explain possible deviations (if any).

5.5 Planning 5.5.1 Expected planning for testing one HRS The following planning is foreseen to run the complete test program as defined in Task 1 (see Table 6 below). DURATION OF TEST CAMPAIGN

Action Sub-task Duration estimation

Installation on site

Travelling of operators morning

DAY 1

Reception and installation of the trailer: - checking that the connection works well - checking that the venting stack works in accordance to the explosion protection document - checking the grounding (ohm-meter)

2h 3h

Metrological check of the scale 1h

1st set of full test program

Check that the installation is undisturbed (by putting one reference mass only) 5 min

3h30 DAY 2

1st filling 20 - 700 bar 10 min

Emptying down to 20 bar 2h



Emptying down to (700-MMQ) 5 min

1st filling (700-MMQ) - 700 bar 5 min

Emptying down to 20 bar 2h (during lunch) 1h


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1st filling 20 - MMQ 5 min

3h30

Emptying down to 20 bar 30 min

Decision if adjustment is needed * Adjustment on the FT 30 min

Verify that adjustment is properly done

1 filling 20-700 bar 10 min

Emptying down to 20 bar 2h (end during night)

2nd set of test program


3h30

DAY 3

2nd filling 20 - 700 bar 10 min





2nd filling (700-MMQ) - 700 bar 5 min

Emptying down to 20 bar 2h (during lunch) 1h

2nd filling 20 - MMQ 5 min

3h


3rd set of test program


3rd filling 20 - 700 bar 10 min


3rdfilling 20 - 350 bar 10 min

3h

DAY 4

3rd filling 350 - 700 bar 10 min


3rd filling (700-MMQ) - 700 bar 5 min

Emptying down to 20 bar 2h (during lunch)

3rd filling 20 - MMQ 5 min


Lunch 1h

Time to perform additional tests if needed 3h30

Decommissioning on site

Inerting (3 compressions - pressure release with N2) 1h 2h

DAY 5 Decommissioning - Ready for transport 1h

Travelling of operators afternoon

Table 6: Forecasted planning for testing of one HRS

*Criteria: adjustment if result deviation is more than 1/2*MPE


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One full week is necessary to perform the full test program for one station. This includes the travel of operators and and the installation and decommissioning of the testing equipment. Some time is kept free to perform additional tests if required (depending on the results obtained) or in case of unforeseen event. This planning will be adjusted after the first HRS tested, based on the operators’ experience. 5.5.2 Global planning for testing different HRS The following planning is proposed to test the HRSs listed above (see Figure 2):

Figure 2: Global planning for test campaign in Task 2

Note: This planning is a proposal and must be discussed and validated by H2 Mobility. The starting date of the test campaign will dependant on the signature of the contract with FCH-JU for Tasks 2 & 3, but also the CE approval of the testing equipment.


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5.6 Conclusions / Summary As a summary, below are the main requirements intended to the HRS operator for the testing of stations listed in §3.1:

● Electrical connection (230 V) ● Recording of the following data coming from the HRS (if possible provided on a USB key):

○ Time measurement ○ Ambient temperature ○ Pressure of HP buffers ○ Gas temperature at the outlet of the dispenser ○ Pressure at the outlet of the dispenser ○ Flow rate: 4-20 mA signal and its belonging parameter settings + recording of pulse signal (if

possible) ● Access to the flowmeter to install an accelerometer ● One operator to assist the team and operate the station (perform fuelings)

List of HRS to be tested (and the order) must be defined with H2 Mobility and the planning validated. Installation on site must be well prepared ahead the tests with the HRS operator:

- objective is not to block drivers during one whole week to fuel their car, and not to move the trailer once installed. Solutions must be found (installation on the opposite side of the dispenser when possible, or trailer installed at 90° with respect to the dispenser, or longer hose for example).

- Installation layout plan must be provided (including vent stack).


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6 Link with several stakeholders in Europe for task 3 In preparation of Task 3, a list of people in different European countries have been identified for a possible participation in Task 3 (see Table 7). These people are experts in the field of legal metrology and gaseous flow metering, and might be interested in being involved to the discussions at a European level for application in their respective country. Organization /

country Name of the contact

person Position within the

organization Phone number / Email

address Comment

METAS /

Switzerland Marc de Huu Head of the flow

laboratory +41 58 387 0267

[email protected]

Coordinator of the

Metering WP in the

MetroHyVe project

CMI / Czech

republic Klenovský Pavel General Director +420 545 555 101

[email protected]

Has worked with Tatsuno

on CNG --> know OIML

R139

But not involved in the

revision

RISE / Sweden

Kerstin Mattiasson Measurement

technology +46 10 516 53 80

[email protected]

Karine Arrhenius /

Oliver BÜKER Involved in the MetroHyVe

project

BEV / Austria

Ulrike Fuchs

or Mrs. Karin

Bittner-Rohrhofer

Head of the department

of legal metrology

+43 512 2070- 1527

[email protected]

'+43 1 21110 6648

karin.bittner-rohrhofer@be

v.gv.at

FORCE /

Denmark Lars Poder

Type approval expert in

the Type Approval &

Development

department

+45

[email protected] Experience in legal

metrology (OIML)

JV / Norway Henning Kolbjornsen Chief engineer (head of

the fluid department) +47 64 84 84 42

[email protected]

Belgium Marc Wouters Market surveillance +32 2 277 94 83

Marc.Wouters_E6@econom

ie.fgov.be

Table 7: Contacts in different European Metrological Institutes Remark: In blue are the Metrological Institutes involved in the MetroHyVe project (Work Package 1 dedicated to metering of hydrogen in refuelling stations).


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6.1 Contact with the MetroHyVe project A preliminary contact has been made with the MetroHyVe project. Cesame Exadebit as a partner of this project made the link with the WP coordinator, Mr Marc De Huu (METAS / Switzerland), to get a timeslot during a regular phone call. This phone call took place on February 5th, 2018. Twenty minutes were allocated to the tender coordinator to present the objectives / planning, and get their adhesion for participation in Task 3. All of them are very interested in the expected test results of Task 2, and accepted to participate in task 3. It has been agreed that several phone calls will be organized frequently to inform them on the progress and to share the test results obtained. Furthermore, the coordinator of WP1 proposed Air Liquide to participate to the General Assembly of the MetroHyVe project, which is planned in Amsterdam on March 12th, in order to introduce:

- Objectives of the tender - The proposed methodology to certify HRS in waiting for the revised version of OIML R139 and outcomes of

the MetroHyVe project - Test campaign to be performed in Task 2

6.2 Contact with other Institutes in Europe In parallel, contact has been made by e-mail with other people not involved in the MetroHyVe project, but also interested in the topic for application in their country. Specific phone calls took place with Belgium, Czech republic and Austria to introduce the tender (objectives / planning) and the benefits for them to participate in Task 3. Formal agreement has been received from: See written commitment received in Annex.


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7 Milestones Several milestones were expected at end of Task 1. Below is the list of milestones and the status of each of them (Table 8):

Milestone number

Milestone name Passed / Failed

Justification

M1.1 Agreement by the 3 NMIs on a simplified testing protocol

Passed Protocol was defined and discussed with the active participation of the 3 Metrological Institutes (PTB, LNE, NMi) and CESAME. This deliverable has been reviewed by all of them. Their comments have been discussed all together and inserted in this deliverable. By reviewing this deliverable, they agree formally with the content.

M1.2 Identification of HRS to be tested in Task 2

Passed See table in part 3.2. Discussion with H2 Mobility to select a few HRS. The final selection and planning is expected end February.

M1.3 Formal agreement of 5 NMIs for participation in Task 3

Passed Contact has been made with the MetroHyVe project and other Metrological Institutes in Europe, by dedicated phone calls. Formal agreement have been received by 2 of them (METAS and CMI). The other ones gave an oral agreement.

M1.4 Certification of the testing equipment

Passed The certificate of conformity to OIML R139 has been issued by PTB on March 26th. . LNE and NMi agreed to write an official letter confirming their agreement with the evaluation report made by PTB, and their acceptance of the trailer as a reference test bench.

Table 8: Status of milestones associated to Task 1


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8 Conclusions / Next steps It is reminded the criteria of success for Task 1 as defined in the tender proposal:

1) Three European national institutes for metrology collaborate with the industry in order to analyse the gaps existing between the current OIML R139 and the needs for HRS metering certification;

2) A specific testing protocol, compliant with existing OIML R139 requirements and adapted to the needs of H2 fueling infrastructure, is defined by the parties. This protocol shall be reliable, easy-to-implement and shall require reasonable implementation time.

3) Agreement is reached between all parties involved about this testing protocol. As a conclusion of Task 1, a protocol for testing and certifying future and existing HRS has been established with and agreed by all partners involved in Task 1: PTB, LNE, NMi Certin and CESAME-EXADEBIT. The approach is based on a gap analysis between the certification of main subcomponents of the measuring device (meter and calculator) and the OIML R139 (2014 version, including its future evolutions as discussed in the revision Working Group). For each category of tests, it is defined if complete new tests, additional tests or no test are required. This evaluation covers both future new stations that will be installed and approved based on this protocol, and existing stations already in operation. In France, a request has been made to “Bureau de la Métrologie” in order to get an national exemption in waiting for the revised version of OIML R139, based on the proposed approach. Therefore it might be that the testing protocol hereunder be validated in France before summer 2018. This results in a simple protocol, mainly based on accuracy tests to be performed on site. These tests are easy to implement by using the testing equipment developed by Air Liquide, and will be implemented in Task 2. Based on the abovementioned criteria, it can be concluded that Task 1 has been successfully achieved. Furthermore, in order to anticipate the work in Task 2 & 3, the organization of the test campaign has been initiated. Several contacts have been made with H2 Mobility in Germany to select the appropriate HRS to perform the test campaign, and to define practical aspects, including the implementation of the trailer in front of the dispenser, the presence of one operator during the test campaign and the data to be recorded. This selection will be refined and frozen in March, as well as the planning. A major milestone to launch the test campaign in Task 2 was the approval of the testing equipment by PTB. An evaluation report has been issued. Based on the requirements listed in this report, the testing equipment has demonstrated good metrological performances: the uncertainty is below the requirement specified in OIML R139 of 2014. In parallel, several contacts have been initiated for the participation of 5 other Metrological Institutes in Europe in Task 3. The MetroHyVe project is informed of the scope and objective of this tender, and several other Institutes have been contacted. Formal agreement have been received by 2 of them (METAS and CMI). The other ones gave an oral agreement.


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9 Appendices Appendix 1: Contact for Approval of Hydrogen Refueling Stations - CMI Czech Republic.pdf Appendix 2: Contact for Approval of Hydrogen Refueling Stations - METAS Switzerland.pdf


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