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Abstract

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.

Additional information

Authors: SMITH I E SCHOOL OF MECHANICAL ENGINEERING, CRANFIELD, BEDFORD (UK), SCHOOL OF MECHANICAL ENGINEERING, CRANFIELD, BEDFORD (UK)
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
Category: PUBLICATION
Available languages: en
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