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2.3 MECHANICAL ENGINEERING, 2.7 ENVIRONMENTAL ENGINEERING, Energy and fuels
This paper presents an assessment of the energy, economic and greenhouse gas emissions performances of a WhisperGen Mk IV Stirling engine μ-CHP unit for use in a conventional house in the Republic of Ireland. The energy performance data used in this study was obtained from a field trial carried out in Belfast, Northern Ireland during the period June 2004 - July 2005 by Northern Ireland Electricity and Phoenix Gas working in collaboration with Whispertech UK. A comparative performance analysis between the µ-CHP unit and a condensing gas boiler revealed that the µ-CHP unit resulted in an annual cost saving of €180 with an incremental simple payback period of 13.8 years when compared to a condensing gas boiler. Electricity imported from the grid decreased by 20.8% while CO2 emissions decreased by 16.1%. The µ-CHP unit used 2,889 kWh of gas more than the condensing gas boiler.
Conroy, G., Duffy, A. & Ayompe, L. (2014) Economic, Energy and GHG Emissions Performance Evaluation of a WhisperGen Mk IV Stirling Engine μ-CHP Unit in a Domestic Dwelling, Energy Conversion and Management, Vol. 81, pp. 465-474, ISSN 0196-8904, doi:10.1016/j.enconman.2014.02.002