Performance evaluation of a water-to-water heat pump with a floor panel heating system

Man Ki Min, Yong Chan Kim, Sang Hyeok Lee, Cheol Soo Ko

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The performance of heat pump is severely degraded as the temperature of the heat source is decreased. For air source heat pumps, this results in a serious mismatch of heat pump output and space heating demand. Although the outdoor temperature is below 0°C, the use of a water-to-water heat pump with a floor panel heating system can operate for extended periods of time without frost-defrost cycling and therefore at a high seasonal efficiency. This paper focuses on the performance of a water-to-water heat pump that uses well water as a heat source and a floor panel heating system as a sink. Field tests of a water-to-water heat pump combined with the floor panel heating system in a heavily insulated miniature test house were conducted to obtain its cyclic performance as well as the seasonal performance. The test house, which had a floor area of 27.5 m2, consisted of three rooms that were equipped with panel heating coils under floor surface. The heating capacity of the water-to-water heat pump was 3.95 kW with double tube heat exchangers. The averaged COP of the water-to-water heat pump system was measured for every cycle throughout the intermediate season and analyzed as a function of outdoor temperature. The cyclic performance such as part load factor, cyclic operation performance, and degradation coefficient degraded as the outdoor temperature increased, because of relatively increasing off-cycle duration in the cycle as well as lengthening of the cycle duration.

Original languageEnglish
Pages (from-to)642-649
Number of pages8
JournalKSME International Journal
Volume13
Issue number8
Publication statusPublished - 1999 Aug 1

Fingerprint

Pumps
Heating
Water
Hot Temperature
Air source heat pumps
Temperature
Heat pump systems
Space heating
Tubes (components)
Degradation

Keywords

  • Cyclic performance
  • Floor panel heating system
  • Water-to-water heat pump

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Performance evaluation of a water-to-water heat pump with a floor panel heating system. / Min, Man Ki; Kim, Yong Chan; Lee, Sang Hyeok; Ko, Cheol Soo.

In: KSME International Journal, Vol. 13, No. 8, 01.08.1999, p. 642-649.

Research output: Contribution to journalArticle

Min, Man Ki ; Kim, Yong Chan ; Lee, Sang Hyeok ; Ko, Cheol Soo. / Performance evaluation of a water-to-water heat pump with a floor panel heating system. In: KSME International Journal. 1999 ; Vol. 13, No. 8. pp. 642-649.
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