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Effect of heat-saving measures on the CO2 savings attributable to micro-combined heat and power (μCHP) systems in UK dwellings

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  • Peacock, A.D.
  • Newborough, M.

Abstract

This paper considers the relationship between heat-saving and micro-combined heat and power (μCHP) technological interventions for reducing the carbon footprint of existing domestic dwellings within the UK housing stock. The relationship between the annual heat requirement of individual dwellings and the CO2 savings attributable to different μCHP systems is investigated (by means of predictive modelling based on heat and power demand datasets recorded on a 1-min time base for nine dwellings). An assessment is made of the effects of various heat-saving measures upon the annual CO2 savings predictions for candidate μCHP system implementations, when applied to ‘domestic building variants’ (as defined within the Carbon Vision TARBASE research programme). The increasing application of heat-saving interventions serves to reduce the CO2 savings solely attributable to a μCHP system. The magnitude of this effect is a function of the μCHP system's electrical efficiency and electrical power output. For example, a 1kW prime mover of 10% electrical efficiency is predicted to reduce annual CO2 emissions by 72kgCO2 for a dwelling with an annual heat requirement of 11.9MWh, but if the identified set of heat-saving measures is implemented first the demand falls to 5.0MWh and the μCHP system will actually result in an emissions increase of 100kgCO2 p.a. By comparison, relative savings of 467 and 294kgCO2 p.a. are predicted if this dwelling is fitted with a 1kW prime mover of 30% electrical efficiency. Still greater savings are predicted for higher power output systems of high efficiency, but a relatively large proportion of the generated electricity (44–75% depending on the heat and electrical demand of the dwelling) must then be exported.

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  • Peacock, A.D. & Newborough, M., 2008. "Effect of heat-saving measures on the CO2 savings attributable to micro-combined heat and power (μCHP) systems in UK dwellings," Energy, Elsevier, vol. 33(4), pages 601-612.
    • Handle: RePEc:eee:energy:v:33:y:2008:i:4:p:601-612
    DOI: 10.1016/j.energy.2007.10.016
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    1. Onovwiona, H.I. & Ugursal, V.I., 2006. "Residential cogeneration systems: review of the current technology," Renewable and Sustainable Energy Reviews, Elsevier, vol. 10(5), pages 389-431, October.
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    Cited by:

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    3. Shimoda, Yoshiyuki & Okamura, Tomo & Yamaguchi, Yohei & Yamaguchi, Yukio & Taniguchi, Ayako & Morikawa, Takao, 2010. "City-level energy and CO2 reduction effect by introducing new residential water heaters," Energy, Elsevier, vol. 35(12), pages 4880-4891.
    4. Maghanki, Maryam Mohammadi & Ghobadian, Barat & Najafi, Gholamhassan & Galogah, Reza Janzadeh, 2013. "Micro combined heat and power (MCHP) technologies and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 28(C), pages 510-524.
    5. Li, S. & Wu, J.Y., 2009. "Theoretical research of a silica gel-water adsorption chiller in a micro combined cooling, heating and power (CCHP) system," Applied Energy, Elsevier, vol. 86(6), pages 958-967, June.
    6. Hawkes, A.D. & Leach, M.A., 2008. "On policy instruments for support of micro combined heat and power," Energy Policy, Elsevier, vol. 36(8), pages 2963-2972, August.
    7. Caresana, Flavio & Brandoni, Caterina & Feliciotti, Petro & Bartolini, Carlo Maria, 2011. "Energy and economic analysis of an ICE-based variable speed-operated micro-cogenerator," Applied Energy, Elsevier, vol. 88(3), pages 659-671, March.
    8. Kazemi-Beydokhti, Amin & Zeinali Heris, Saeed, 2012. "Thermal optimization of combined heat and power (CHP) systems using nanofluids," Energy, Elsevier, vol. 44(1), pages 241-247.
    9. Wang, Yaodong & Huang, Ye & Chiremba, Elijah & Roskilly, Anthony P. & Hewitt, Neil & Ding, Yulong & Wu, Dawei & Yu, Hongdong & Chen, Xiangping & Li, Yapeng & Huang, Jincheng & Wang, Ruzhu & Wu, Jingyi, 2011. "An investigation of a household size trigeneration running with hydrogen," Applied Energy, Elsevier, vol. 88(6), pages 2176-2182, June.
    10. Jenkins, D.P., 2010. "The value of retrofitting carbon-saving measures into fuel poor social housing," Energy Policy, Elsevier, vol. 38(2), pages 832-839, February.
    11. Jenkins, D.P. & Peacock, A.D. & Banfill, P.F.G. & Kane, D. & Ingram, V. & Kilpatrick, R., 2012. "Modelling carbon emissions of UK dwellings – The Tarbase Domestic Model," Applied Energy, Elsevier, vol. 93(C), pages 596-605.

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    Keywords

    Micro-CHP; Domestic sector; Energy efficiency; CO2 savings;
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