DESIGN AND DEVELOPMENT OF ABSORPTION HEAT PUMPS
The aim of the research was to demonstrate an absorption heat pump capable of accepting heat from ambient air at building design temperatures, typically - 1 degrees C, and elevating it typically to 70 degrees C to supply hydronic central heating systems. An absorbent consisting of a mixture of sodium and potassium hydroxide has been investigated with water as the working fluid and it has been demonstrated that it will accept heat at -5 degrees C and deliver heat 68 degrees higher. If the condenser of the heat pump was operated at temperatures of around 80 degrees C then the heat pump system would meet the above requirement. Liquid water, containing an antifreeze component has successfully been evaporated at -5 degrees C, and heat transfer coefficients for evaporation at these, and lower temperatures, have been measured. Both film and flash evaporation have been investigated in a quantitative manner. The important matter of constructional materials has been investigated through literature review and consultation and no insuperable problems have been identified.
Bibliographic Reference: EUR 10808 EN (1986) MF, 66 P., BFR 150, BLOW-UP COPY BFR 330, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989125042100 / Last updated on: 1987-07-01
Available languages: en