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ENA - Biomethane Campaign Working Group

NIA Projects - Update

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Siloxane - Online Analyser • Scope:

– To demonstrate the suitability (or otherwise) of this analytical technique for protecting the UK GDNs.

• Why:

– If Total Silicon limits are imposed by the HSE, GDNs will need to demonstrate compliance through the use of accurate analytical techniques/equipment.

• The role of DNV GL:

– DNV GL have scoped out a project to assess the performance of a siloxane analyser in the laboratory and during a field trial at Severn Trent Minworth Bio methane plant. Testing on bio methane derived from waste water treatment plant will provide a robust and stringent test of the equipment.

• Progress to-date:

– Sanction paperwork sent for fast track approval on 5th August 14.

– Meeting held with Seven Trent Water o site to finalise proposal

– PEA will be registered as soon as possible after sanction.

– Purchase Order to be placed in mid September with first installation of FTIR analyser in October

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UK Siloxane Impact Study – Domestic Appliances • Determine hierarchy of effects for UK domestic appliances ranging from “nuisance” to “risk for

safe operation” during the lifetime of the appliance

• Flame safety device, power reduction, window opacity (fires), CO emissions, etc.

• Perform experiments at four different siloxane concentrations for each selected appliance and analyze results based on earlier experience and analysis extrapolate to possible specification levels

• Choice of appliances proposed with ENA and British Trade Association

• Possible ‘pre-examination’ to select sensitive appliances

• The experimental design and analysis is aimed at a method of extrapolation that is consistent with and/or verified by experimental results

• Final deliverable is hierarchy of effects in time at three potential specification levels:

• – 0.05, 0.1 and 0.5 mg Si/m3 (chosen with ENA) dose/effect results: time-to-effect at different concentrations

• Note: discussion of the project content, budget options and planning is in “Outline Proposal and Budget Estimate for ENA Siloxane Impact Study; Domestic Appliances” (16 December 2013)

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UK Siloxane Impact Study – Domestic Appliances

Total NIA cost £353,495 inclusive of cost to purchase appliances, two possibilities:

Costs include fuel consumption, siloxanes, analyses; exclude costs of appliances, travel costs

and VAT.

• Length of project: 18 months – 4 phases.

• Phase 1 – 2 months – Development of test program

• Phase 2 – 3 months – Pre examination

• Phase 3 – 12 months – Experiments on selected appliances

• Phase 4 – 3 months – Analysis of the impact of silica deposition on appliance performance

• Sanction paperwork sent for review – to be tabled at 18th August IPG

– Collaborative with SGN & NGN

– Draft Contract sent to all parties .

– PEA and cost split agreed by all parties.

– Order to be placed in September