IEA-ECBCS Annex 48 : Heat Pumping and Reversible Air Conditioning

IEA-ECBCS Annex 48 : Heat Pumping And Reversible Air Conditioning

IEA-ECBCS Annex 48 : Heat Pumping and Reversible Air Conditioning

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In June 2006, the IEA Energy Conservation in Buildings and Community Systems Programme (ECBCS) executive committee decided to launch the three-year working phase of the Annex 48 on Heat pumping and reversible air conditioning.

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Substituting a heat pump to a boiler may save more than 50 % of primary energy, if electricity is produced by a modern gas-steam power plant (and even more if a part of that electricity is produced from a renewable source). “Heat Pumping” is probably today one of the quickest and safest solutions to save energy and to reduce CO<sub>2</sub> emission. Most of air-conditioned commercial buildings offer attractive retrofit opportunities, because:
  • When a chiller is used, the condenser heat can cover (at least a part of) the heating demand;
  • When a chiller is not (fully) used for cooling, it can be (at least partially) re-converted into heat pump.
The retrofit of an existing building and, even more, the design of a new one should take all possibilities of heat pumping into consideration, in such a way to make air conditioning as “reversible” as possible. Different techniques are already available, but a recent survey of monitoring results established in Germany made still appear a lot of faults, lacks of optimisation and surprisingly low COP (coefficient of performance) after, at least, one year of operation. It appears that the many mistakes...
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