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How do Heat Pumps Work?
How do Heat Pumps Work?
    All heat pumps use the principle of Boyles law – that the temperature and vapour pressure of a substance are directly and proportionately related at a constant volume.Boyles Law: PV/T = constantWith most heat pumps the overall heat pump itself has a fixed volume hence as pressure is changed the temperature changes proportionately and vice versa.The Vapour Compression CycleBy far the most common form of heat pump uses a vapour compression cycle and hence has some form of compressor installed in the circuit which is most usually powered by electricity but can be driven by a gas internal combustion engine.Gas Absorption Heat PumpsThese use the principle of applying heat –
What is a Heat Pump?
What is a Heat Pump?
    It does just what it suggests, it pumps heat, taking energy from a (relatively) low temperature source and forces that heat to a higher temperature making it more useful. It is analogous to a water pump which raises water from low level to a higher level, a heat pump does the same – but with heat! This diagram is purely illustrative of the effect of a heat pump and not its operation.Even ice still has some heat energy, in fact energy is always present until the value of "absolute zero" is reached some –273.16°C, which is why the Kelvin scale has its start point at absolute zero (and hence freezing point is +273.16 Kelvin).We should all be familiar with
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