NUMERICAL STUDY ON HEAT TRANSFER PERFORMANCE OF GEOTHERMAL PILE-FOUNDATION HEAT EXCHANGER IN GSHP SYSTEM

被引：0
|
作者：
Zhang, Hezhi
Chen, Zhenqian
机构：
来源：
FOURTH NZAAR INTERNATIONAL EVENT SERIES ON NATURAL AND BUILT ENVIRONMENT, CITIES, SUSTAINABILITY AND ADVANCED ENGINEERING | 2018年
关键词：
Ground source heat pump; Pile-foundation heat exchanger; Heat transfer performance; Temperature distribution; Numerical simulation; TUBE; SIMULATION; MODEL;
D O I：
暂无
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Targeting the heat transfer performance of geothermal pile foundation heat exchanger in ground source heat pump system (GSHP), the physical model of pile-foundation heat exchanger with treble U-shaped form of pipes in surrounding soil were established. CFD software was used to simulate heat transfer processes based on the Finite Element Method for Nanjing area. In cooling mode, heat transfer performance inside and outside of concrete pile was analyzed. Heat transfer flux per meter of the pile-foundation heat exchanger (Q, W.m(-1)) gradually decreases and eventually stabilizes at around 60 W.m(-1) with system running for one month. The higher thermal conductivity of pile foundation heat exchanger contributes to the higher heat transfer efficiency than soil. Simulation results are approximate to the actual results and can be used as theoretical basis for the design and application of pile-foundation heat exchanger in GSHP system.
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页码：102 / 111
页数：10
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