Design and Test of a Domestic Heat Pump with Ammonia as Refrigerant
2011 (English)In: 4th IIR Conference: Ammonia Refrigeration Technology, France: International Institute of Refrigeration, 2011Conference paper (Other academic)
Among alternative refrigerants, ammonia with zero Ozone Depleting Potential (ODP) and Global Warming Potential (GWP), and favorable thermodynamic properties is a sensible choice as a replacement for the synthetic refrigerants, which are powerful greenhouse gases.
In this paper, the results of experiments done on a new ammonia water-to-water heat pump prototype at different evaporation temperatures and compressor speeds are reported. The heat pump is designed to deliver 7 kW heat at evaporation temperature of -5°C and condensation temperature of 40°C. The hot discharge gas from compressor is utilized to provide sanitary hot water, and the rest of the heat is used for preheating the tap water and space heating of a single-family house. The compact design of the heat pump helps reducing the refrigerant charge. To reduce the charge further and to prevent oil accumulation at the bottom of evaporator, a minichannel aluminum heat exchanger is used as evaporator.
Place, publisher, year, edition, pages
France: International Institute of Refrigeration, 2011.
ammonia, heat pump, COP, performance, minichannel heat exchanger, tap water heating, domestic hot water
IdentifiersURN: urn:nbn:se:kth:diva-76029OAI: oai:DiVA.org:kth-76029DiVA: diva2:490666
4th IIR Conference: Ammonia Refrigeration Technology, Ohrid, Macedonia, April 14-16, 2011
QC 201204132012-02-062012-02-062012-04-13Bibliographically approved