Engineering application analysis on ground-coupled heat pump system in hot summer and cold winter region

CHEN Jinhua; XIA Lei

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Engineering application analysis on ground-coupled heat pump system in hot summer and cold winter region

CHEN Jinhua 1 * #,XIA Lei 2

1.Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment of Ministory of Education, Chongqing 400045

2.School of Urban Construction & Environmental Engineering, Chongqing University, Chongqing 400045

*Correspondence author

#Submitted by

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Funding: none

Opened online:30 December 2013

Accepted by: none

Citation: CHEN Jinhua,XIA Lei.Engineering application analysis on ground-coupled heat pump system in hot summer and cold winter region[OL]. [30 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4577793

The performance and energy efficiency of seven ground-coupled heat pump (GCHP) systems in hot summer and cold winter region are analyzed on the basis of summer and winter testing data and compared with that of air source heat pump system as well as screw water chiller with boiler system. The results demonstrate that: the cooling energy efficiency ratio reaches 3.5~4.2 for units and 2.8~3.3 for systems, the heating energy efficiency reaches 3.2~4.0 for units and 2.2~3.3 for systems. Rates of improvement in energy efficiency of GCHP system are 8.2%~28.8% for cooling and 5.0%~40.4% for heating compared with air source heat pump system. The cooling energy efficiency ratio of GCHPs is a little bit higher than that of water chiller, whereas the heating energy efficiency ratio is 5.8%~47.5% higher than that of boiler. The energy saving rate is obvious.

Keywords:ground-coupled heat pump; hot summer and cold winter; energy efficiency ratio for unit; energy efficiency ratio for system; energy saving rate

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