HEAT PUMPS HEATING FROM NATURAL SOURCES
Heat pumps extract heat from a natural source (air, ground or water) and concentrate it to obtain a higher temperature. This gathered heat is usually then applied to water for space heating.
The device which does this can be thought of as a refrigerator operating in reverse. It is powered by electricity, but the amount of heat energy delivered is several times more than the electrical energy consumed. The ratio of output to input energy is called the Coefficient of Performance (COP), with air source heat pumps achieving heat outputs of roughly 2.5 times the electrical input and ground source 3-3.5 the electrical input.
Heat pumps can be more efficient than traditional heating systems, provided they are coupled with larger radiators or under floor heating. A good standard of building insulation is also essential.
Heat pumps are ‘fit and forget’ technologies, meaning there’s no need for fuel deliveries and only minimal maintenance requirements.
MANIFESTO ASKS
• Give industry post-2016 certainty - Maintain and expand the RHI to at least 2020, confirming budgets from 2016-2020
• Future-proof new buildings - Focus on on-site solutions by ensuring carbon compliance standards in building regulations promote integrated heating solutions to protect new housing from future retrofitting
• Focus on efficiency - The RHI needs a better mechanism to promote more efficient heat pump systems. Currently there is a fear in the industry that less efficient cheaper systems are indirectly favoured, which could cause customer dissatisfaction in the medium to long term
Ground source heat pump 11
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