Study on an advanced borehole heat exchanger for ground source heat pump operating in volcanic island: Case study of Jeju island, South Korea

Frontiers in Built Environment

Built Environment

Jong Woo Kim¹  Qian Chen²  Cui Xin³  Seung Jin Oh⁴  Yeong-Min Kim⁴  Yoon Jung Ko⁴ 

[1] Department of Mechanical Engineering, Jeju National University, Jeju City, Jeju Special Self-Governing Province, South Korea;Research and Development Division, Intertech Co., Ltd., Jeju City, Jeju Special Self-Governing Province, South Korea;Institute for Ocean Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, China;Institute of Building Environment and Sustainable Technology, Xi’an Jiaotong University, Xi’an, China;Korea Institute of Industrial Technology, Cheonan, Jeju Special Self-Governing Province, South Korea;

关键词: borehole heat exchanger;    ground-source heat pump;    volcanic island;    renewable energy;    thermal response test;   

DOI  :  10.3389/fbuil.2022.1061760

 received in 2022-10-05, accepted in 2022-12-19,  发布年份 2022

来源: Frontiers

【 摘 要 】

This paper presents an advanced borehole heat exchanger that has been developed in order to apply a ground source heat pump to a volcanic island where the existing borehole heat exchangers are inapplicable by local ordinance. The advanced borehole heat exchanger was fabricated and installed at a verification-test site to evaluate its heat capacity in terms of refrigeration ton (RT). The proposed heat exchanger was also compared with the conventional heat exchanger that was made of high-density polyethylene (HDPE) heat exchanger. The thermal response test was carried out by flowing water at various temperatures into the heat exchangers at the fixed flow rate of 180 L/min. The results revealed that the maximum heat capacity for the developed heat exchanger was measured at 63.9 kW, which is 160% higher than that of the high-density polyethylene heat exchanger (39.9 kW). It was also found that the developed HX has the highest heat gain achieving 94 kW as compare to 21 kW for high-density polyethylene-Hx.

【 授权许可】

Unknown   
Copyright © 2022 Kim, Kim, Ko, Chen, Xin and Oh.