Water-to-water heat pump test facility

T. Y. Bong, K. C. Ng*, K. O. Lau

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


A novel facility for testing water-to-water heat pumps of residential size for heat recovery has been developed. It makes use of a mixing tank and a cooling tower and does not require any heating or other external cooling. Programmable PID controllers are used to maintain the temperatures of water supplied to the evaporator and condenser constant within a tolerance of ±0.2°C. The heating capacity can reach a steady state in less than 60 min for each set of water temperature settings. The facility has been used to test a heat pump, which makes use of a semi-hermatic compressor with a displacement volume of 26.8 m3 h-1 and the test results are presented. By using the same principle, a similar test facility for heat pumps of larger capacities can be designed.

Original languageEnglish (US)
Pages (from-to)133-141
Number of pages9
JournalHeat Recovery Systems and CHP
Issue number2
StatePublished - 1989
Externally publishedYes

ASJC Scopus subject areas

  • General Engineering
  • General Energy


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