The performance of the backfills of the borehole heat exchanger of the ground source heat pump system in cooling dominated region of China

W. Ma, J. Hao, C. Zhang, F. Guo, H. Wen

Research output: Chapter in Book or Report/Conference proceedingConference Proceedingpeer-review

Abstract

The ground temperature increase is the crucial problem that influences the longterm performance of Ground Source Heat Pump (GSHP) system in cooling dominated region of China. In this report, the numerical simulation model based on the heat rejection model of an insitu Thermal Response Test (TRT) is created using TRNSYS simulation tool. Seven different thermal conductivity backfills are simulated for 1, 5, 10, 15 and 20 years. The result illustrates that the higher conductivity backfills improves the heat exchange performance between BHE and surrounding ground but it also increases the ground temperature in cooling dominated regions for long terms operation. In the case of Chuzhou city of this study, when the conductivity of backfill is higher than 1.9 W/(m·K) which is closest to the thermal conductivity of the surround ground, there are little growth in ground temperature as well as the heat exchange performance.

Original languageEnglish
Title of host publicationSustainable Buildings and Structures
Subtitle of host publicationBuilding a Sustainable Tomorrow - Proceedings of the 2nd International Conference in Sustainable Buildings and Structures, ICSBS 2019
EditorsKonstantinos Papadikis, Chee S. Chin, Isaac Galobardes, Guobin Gong, Fangyu Guo
PublisherCRC Press/Balkema
Pages243-248
Number of pages6
ISBN (Print)9780367430191
DOIs
Publication statusPublished - 2020
Event2nd International Conference in Sustainable Buildings and Structures, ICSBS 2019 - SUZHOU, China
Duration: 25 Oct 201927 Oct 2019

Publication series

NameSustainable Buildings and Structures: Building a Sustainable Tomorrow - Proceedings of the 2nd International Conference in Sustainable Buildings and Structures, ICSBS 2019

Conference

Conference2nd International Conference in Sustainable Buildings and Structures, ICSBS 2019
Country/TerritoryChina
CitySUZHOU
Period25/10/1927/10/19

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