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ea technology. DCHP Field Trials Practical Experiences with the WhisperGen Project Manager : Rob Green Presented by Yvonne Dickson. Overview. Introduction to the WhisperGen History of EA Technology’s involvement WhisperGen & the Stirling Cycle Field trials Performance

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  1. ea technology DCHP Field Trials Practical Experiences with the WhisperGen Project Manager : Rob Green Presented by Yvonne Dickson

  2. Overview • Introduction to the WhisperGen • History of EA Technology’s involvement • WhisperGen & the Stirling Cycle • Field trials • Performance • Does it save money? • Does it reduce CO2 emissions?

  3. What is the WhisperGen • Floor-mounted boiler replacement • External combustion • Stirling cycle

  4. WhisperGen in the home

  5. Project History • 1999 - studies of commercial viability • 2000 - lab demo of Mk I WhisperGen • 2001 - Mk I • 3 trial houses + test house + lab endurance • 2002 - alpha trial Mk II • 13 houses + lab endurance (4) • 2003 - beta trial Mk III • 15 Chester + 13 Ipswich + lab (Mk II & III) • 2003 / 4 - Mk IV • pre-launch checks - 3 Chester houses

  6. Project History (2) Powergen market launch 2004 • EA Technology training of installers • Monitoring for Carbon Trust & DTI

  7. The Stirling Cycle Piston Gas Flame Regenerator Cooling Circuit Gas Piston

  8. The Stirling Cycle

  9. The Stirling Cycle compression at constant temperature

  10. The Stirling Cycle displacement / regeneration at constant volume

  11. The Stirling Cycle expansion at constant temperature

  12. The Stirling Cycle displacement / regeneration at constant volume

  13. WhisperGen & the Stirling Cycle

  14. WhisperGen • Mk IV current • 0.85 kWe / 6 kW t • 1.2 kWe / 8 kW t • Mk V soon • ~ 1 kWe / 7 kW t to ~ 1 kWe / 15 kW t

  15. The need for field trials Prototype: • Ease of installation • Reliability • Operational experience • Control systems • User acceptability • Performance / Economics • Improvements

  16. The need for field trials (2) Market ready: • Carbon Trust • CO2 emissions • Product accreditation • DTI / electricity suppliers • Electricity metering / settlement

  17. EA Technology Field Trials

  18. What to measure? • Electricity kWh • Generation • House in and out • Heat output • Gas input • Temperatures?

  19. Findings • Range of house types & occupancy patterns • Both affect run hours • Occupant behaviour – big variable • Sales + Accreditation? • User acceptability • Noise • Speed of response

  20. Economics – does it save money? • Well matched (application & engine) • £150 to £200 / year (~ €250 / year) • Need long run hours • Occupancy pattern • House heat loss (need large houses) • Mk V

  21. Carbon Trust Monitoring Trial • Government targets CO2 • Global warming / Kyoto • dCHP high priority • dCHP in context of house • 60 WhisperGen sites to be monitored • 40 Powergen • 20 Northern Ireland

  22. Carbon Trust Method Telemetry system GSM Logger / receiver Temperatures Pulses (Gas, electric, heat)

  23. Does it save CO2? • Comparing against? • Boiler (B rated 86%+, A rated ~93%) • Central power station • If dCHP overall efficiency >= boiler efficiency • Obviously reduces CO2 emissions • If dCHP overall efficiency < boiler efficiency • Not so clear cut

  24. Conclusions • WhisperGen is commercially available • Stirling Cycle, External Combustion • Field trials are essential to prove: • Customer acceptability, reliability, use patterns export (utilisation) etc. etc. • Occupant behaviour has a big effect • Mk V should expand market for WhisperGen • Saves CO2? rob.green@eatechnology.com

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