Improved method and case study of thermal response test for borehole heat exchangers of ground source heat pump system

2010 ◽  
Vol 35 (3) ◽  
pp. 727-733 ◽  
Author(s):  
Huajun Wang ◽  
Chengying Qi ◽  
Hongpu Du ◽  
Jihao Gu
Keyword(s):  
Heat Exchangers ◽  
Thermal Response ◽  
Ground Source Heat Pump ◽  
Thermal Response Test ◽  
Improved Method ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source ◽  
Borehole Heat Exchangers

Introduction of a Thermal Response Test (TRT) Apparatus Used for Measuring Underground Heat Exchanger Characteristics

2014 ◽  
Vol 937 ◽  
pp. 381-385
Author(s):  
Yi Liu ◽  
Yang Shi ◽  
Ya Ning Zhang
Keyword(s):  
Heat Exchanger ◽  
Thermal Response ◽  
Heilongjiang Province ◽  
Ground Source Heat Pump ◽  
Thermal Response Test ◽  
Pump System ◽  
Heat Pump System ◽  
Response Test ◽  
Ground Source

Abstract. A thermal response test (TRT) apparatus is introduced in this paper for determination of the performance of underground heat exchanger in ground-source heat pump system. The inlet and outlet temperatures of the underground heat exchanger can be real-time tested to obtain the heat transfer data. The apparatus was used to test a underground heat exchanger for its inlet and outlet temperatures in Red Star farm, Beian City, Heilongjiang province, China. The inlet and outlet temperatures varied in the ranges of 10.62~13.57°C and 9.01~11.88°C within 24 hours, respectively.

Thermal response test and numerical analysis based on two models for ground-source heat pump system

2013 ◽  
Vol 66 ◽  
pp. 657-666 ◽  
Author(s):  
Xiaohui Yu ◽  
Yufeng Zhang ◽  
Na Deng ◽  
Jianshuan Wang ◽  
Dongwen Zhang ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Heat Pump ◽  
Thermal Response ◽  
Ground Source Heat Pump ◽  
Thermal Response Test ◽  
Pump System ◽  
Heat Pump System ◽  
Response Test ◽  
Ground Source

Numerical Simulations of a Ground Source Heat Pump System With Pile Heat Exchangers

2014 ◽  
Vol 7 (1) ◽  
Author(s):  
Masahito Oguma ◽  
Takeshi Matsumoto ◽  
Takao Kakizaki
Keyword(s):  
Numerical Simulation ◽  
Numerical Simulations ◽  
Heat Pump ◽  
Heat Exchangers ◽  
Heat Supply ◽  
Ground Surface ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source

Feasibility of a ground source heat pump (GSHP) system with pile heat exchangers for use in houses is evaluated through a numerical simulation. This GSHP system differs from ordinary borehole-type GSHP systems because short foundation piles installed at close intervals are used as heat exchangers. It is shown that the annual heat supply provided by this GSHP system is able to satisfy the demand of a house due to the air-source exchange at ground surface.

Heat Transfer Analysis of Groundwater Flow for Ground Heat Exchangers in the Multi-Borehole Field of Ground Source Heat Pump under the Intermittent Operation

2014 ◽  
Vol 548-549 ◽  
pp. 595-600
Author(s):  
Can Can Zhang ◽  
Yue Jin Yu
Keyword(s):  
Groundwater Flow ◽  
Heat Pump ◽  
Heat Exchangers ◽  
Heat Transfer Analysis ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Heat Exchangers ◽  
Ground Source ◽  
Thermal Interference

In order to analyze the influence of groundwater flow on ground heat exchangers with different arrangements, with a project in Nanjing the access temperature field in the multi-borehole field was simulated after the ground source heat pump system had been performed for a year. Simulation results show that the access temperature is higher in the ground surrounding the borehole than the center of the corresponding borehole, thus forming a thermal barrier surrounding the borehole. Groundwater flow helps relieve temperature imbalance owing to the imbalance of heating and cooling load. The performance of the ground heat exchangers is better in staggered arrangement than in aligned arrangement. In the borehole field, the boreholes upstream have thermal interference on those downstream. And the extent of thermal interference depends on the direction of the groundwater flow when the locations of the boreholes are fixed in the borehole field.

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