Thermal Response Test - interreg-central.eu · ZAE Bayern ZAE Bayern TRT Workshop GeoPLASMA in...
Transcript of Thermal Response Test - interreg-central.eu · ZAE Bayern ZAE Bayern TRT Workshop GeoPLASMA in...
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017© ZAE Bayern
Bavarian Center for
Applied Energy Research
Thermal Response TestIEA ECES Annex 21, VDI 4640 Vol. 5 and EN ISO 17628
Dipl.-Phys. Manfred Reuß
ZAE Bayern, Walther-Meißner-Str.6, 85748 Garching
[email protected]; www.zae-bayern.de
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 2
Bavarian Center for Applied Energy Research – ZAE Bayern
Complete energy competence from one source
Energy Storage Energy Efficiency Renewable Energies
Location
Garching/MunichLocation Wuerzburg Location Erlangen
• System Engineering
• Solar Thermal and
Geothermal
• Electrochemical
Energy Storage
• Heat Conversion
• Applied IR Metrology
• Energy Optimized
Buildings
• Organic PV and
Electronics
• Thermal Analysis
• Solar Fab of the
Future
• PV Systems
• Imaging and
Thermosensorics
• Smart Grids
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 3
IEA - International Energy Agency
29 member countries (OECD)
IEA TCP - IEA Technology Collaboration Programs
IEA ECES - Energy Storage
Annex 21 – Thermal Response Test
Annex 27 – Quality Management of Borehole Heat Exchangers
IEA ECES Annex 21
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 4
Annex 21 was proposed at the Ecostock Conference 2006 in USA
It was approved by the ECES ExCo 2007
Start Nov. 2007 (Kick-off in Germany)
End Dec. 2010
Participating countries
10 officially participating countries:
Canada, Finland, Germany, Italy, Japan, Korea, Sweden, Norway, Spain
The Netherlands and Turkey
6 observing countries:
Argentina, Austria, Belgium, China, Switzerland and USA
IEA ECES Annex 21
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 5
IEA ECES ANNEX 21: OBJECTIVES
Annex 21 Objectives
Compilation of TRT experiences worldwide to identify problems
Further developments
Dissemination of gained knowledge and
Promotion of the technology
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 6
Content
Sub-task 1. TRT state-of-the-art Study
➢ Purpose of TRT
design values, R&D, quality control
➢ Potential applications
BHEs, energy piles, horizontal ground collectors
➢ Description of experimental setups in use in different countries
➢ Test procedure
like heat injection or extraction
➢ Evaluation models
analytical or numerical models
➢ Theoretical background – basics for TRT
➢ Lists of references
➢ Experiences from ‘non-mobile’ measurements
IEA ECES Annex 21
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 7
Content
Sub-task 2. New Developments
➢ Method to determine undisturbed ground temperature
➢ Continuous temperature logging in several depths while testing
➢ Groundwater influence
➢ TRT while drilling
➢ TRT for special geometries like energy piles and horizontal ground collectors
➢ The Swiss Fish method etc.
➢ Pulse test
IEA ECES Annex 21
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 8
Content
Sub-task 3. Evaluation methods and developments
➢ Comparison of equipment
➢ Comparison of test procedure
➢ Comparison of evaluation methods
➢ Software for automatic evaluations: Common evaluation tool
➢ comparative evaluation of reference test data: Common data set for evaluation
➢ include heat capacity cp in the evaluation: Modified test procedure e.g. pulse
test
➢ evaluation during testing e.g. to determine duration: Useful to determine test
duration
➢ work out system design models which are especially based on TRT results:
Use the same model for evaluation of test and for design
IEA ECES Annex 21
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 9
Content
Sub-task 4. Standard TRT Procedures
➢ Initiate a worldwide TRT standard:
Start with ASHREA test procedure completed by experiences from different
testing groups
➢ TRT for commissioning, quality control and for failure analysis. For these
purposes requirements have to be defined.
Sub-task 5. Dissemination Activities
➢ Invitation to “new” countries – workshop and courses on how to use TRT
➢ Common website of compiled TRT information
➢ best practice document
➢ reports
IEA ECES Annex 21
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 10
Content (3 p.)
1 Scope
2 Normative references
3 Definitions
4 Abbreviations
VDI 4640 Vol. 5 - Thermal Response Test
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 11
Content (16 p.)
5 Thermal response test
5.1 Theoretical background
line source model, extent of validity, cylinder source, numerical evaluation
5.2 TRT-equipment and set-up
5.3 TRT performance
requirements on the site (other activities while testing), determination of test
parameter, connection of TRT to the BHE, undisturbed ground temperature,
performance of measurement
5.4 Requirements on sensors and data acquisition
5.5 Evaluation of measured data
heating period, convergence of results, forward and backward evaluation,
minimum time criterion, groundwater influence, correct use of results
5.6 Documentation of results
VDI 4640 Vol. 5 - Thermal Response Test
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 12
Content (6 p.)
6 Extended methods and supplementary measurement to TRT
6.1 Measurement of depth-resolved temperature profiles
measurement method, results and derivable parameters
6.2 Depth-resolved TRT
electric heating, heating via fluid
6.3 Test for exclusion of vertical permeability in the annular space of BHE
6.4 Test for determination of the real length of the BHE
6.5 Multi-pulse test
analytical solution, test repetition
VDI 4640 Vol. 5 - Thermal Response Test
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 13
Content (12 p.)
Bibliography
Appendix A Example of a questionnaire regarding site data
Appendix B Example of a test report
B1 Introduction
B2 Theoretical background
B3 Experimental set-up
B4 Test performance and evaluation
B5 Summary and conclusions
VDI 4640 Vol. 5 - Thermal Response Test
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 14
EN ISO 17628:2015
Geotechnical investigation and testing -- Geothermal testing --
Determination of thermal conductivity of soil and rock using a
borehole heat exchange (16 p.)
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Installation of borehole heat exchangers
5.1 Drilling rig an ancillary equipment
5.2 Borehole heat exchangers, filling and annular space filling materials
5.3 General requirements prior to installation
5.4 Execution
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 15
EN ISO 17628:2015
Geotechnical investigation and testing – cont. (7 p.)
6 Geothermal response testing
6.1 General
6.2 Test equipment
6.3 test procedure
6.4 Test results
6.5 Evaluation of the test results
7 Report
7.1 Field report
7.2 Report of the results
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 16
EN ISO 17628:2015
Geotechnical investigation and testing – cont. (7 p.)
Annex A: Example of a form for the preliminary information on the intended installation of heat exchanger
Annex B: Field reports
B1 Record of the installation of the heat exchanger tubes
B2 Annular space filling record
B3 Checking record
B4 Record of measured values and test results
B5 Record of evaluated test results
Annex C: Example of the graphical presentation of the installed borehole heat exchanger and geology along the borehole
Bibliography
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 17
CONCLUSIONS
➢ IEA ECES Annex 21 – international experts group from 16 participating countries
▪ Summary of the state-of-the-art
▪ New developments
▪ Evaluation methods and developments
▪ Standard TRT Procedures
▪ Dissemination Activities
➢ IEA ECES Annex 21 elaborated the basis for development of TRT standards
➢ VDI 4640 Vol. 5 “Thermal Use of the Underground – Thermal Response Test” was
the 1st guideline based on the results of Annex 21 and further experts
➢ VDI 4640/5 gives detailed information and requirements on TRT
theory, limitations of models, experimental set-up, monitoring equipment, how to
perform a TRT, evaluation of results
➢ EN ISO 17628 is considering the TRT only superficially
poor description, no theoretical background, limitations regarding the application of
the model (e.g. line source) are not given
© ZAE Bayern TRT Workshop GeoPLASMA in Prague – 15.03.2017 18© ZAE Bayern
Thank you for your attention
18
The German participation in IEA ECES Annex 21 was part of the project “ Quality Management of Borehole
Heat Exchangers and Ground Heat Collectors”. This project was funded by the Federal Ministry of
Economy and Technology based on a decision of the Federal Parliament (FKZ: 0327453A).
The authors thank for this support