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IIR document

Mini heat pumps for highly insulated residential houses.

Number: pap. ID: 834

Author(s) : PEDERSEN P. H., JACOBSEN E. E., MADSEN C., et al.

Summary

A small heat pump has been developed and tested. The heat pump utilises a variable speed compressor, which originally was developed for plug-in supermarket cabinets. The heating capacity of the prototypes can vary between 1.0 and 2.1 kW. The refrigerant charge is 150 grams of R290 (propane). Another similar prototype is charged with 375 grams of R134a. Tests were conducted according to EN14511 at 0/+35°C and COP was measured to between 3.2 and 3.6 depending on the compressor speed and the type of plate heat exchanger that was used. That is quite good for such small machines. One of the prototypes was installed in EnergyFlexHouse, which is a new, highly insulated house where tests can be carried out. The house is equipped with two small heat pumps: 1. An exhaust air heat pump that takes energy from the exhaust air and produces hot tap water and heats the intake air. 2. A mini heat pump for floor heating that takes energy from a ground source outside the house.

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Pages: 8 p.

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Details

  • Original title: Mini heat pumps for highly insulated residential houses.
  • Record ID : 30001821
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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