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 language | English |
|---|---|
| Pages (from-to) | 642-649 |
| Number of pages | 8 |
| Journal | KSME International Journal |
| Volume | 13 |
| Issue number | 8 |
| Publication status | Published - 1999 Aug 1 |
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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 journal › Article
}
TY - JOUR
T1 - Performance evaluation of a water-to-water heat pump with a floor panel heating system
AU - Min, Man Ki
AU - Kim, Yong Chan
AU - Lee, Sang Hyeok
AU - Ko, Cheol Soo
PY - 1999/8/1
Y1 - 1999/8/1
N2 - 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.
AB - 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.
KW - Cyclic performance
KW - Floor panel heating system
KW - Water-to-water heat pump
UR - http://www.scopus.com/inward/record.url?scp=0033177241&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033177241&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0033177241
VL - 13
SP - 642
EP - 649
JO - Journal of Mechanical Science and Technology
JF - Journal of Mechanical Science and Technology
SN - 1738-494X
IS - 8
ER -