The economic viability of stand-alone heat pumps for space heating is limited by the achievable coefficient of performance. By combining the heat pump with a plate recuperator in full fresh air systems the average heating season efficiency can be increased to the equivalent of a COP of 6. The system works both as a heating and cooling system and will provide over 90% of annual energy requirement, making the use of central heating plant for back-up heating uneconomical. The resulting capital cost saving can be used to offset in part or in full the extra capital cost of the heat pump equipment.
Frequency Analysis for London Weather Centre, 1.10.74 to 31.12.82 (London: Meteorological Office ) (1983)
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Reference Year Frequency Data (Copenhagen : Meteorologisk Institut) (1981 )
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Letherman K M. and Dewsbury J.The Bin Method-A procedure for predicting seasonal energy requirements in buildingsBuilding Serv. Eng. Res. Technol.7(2) 55-64 (1986)
