李素芬

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:女

毕业院校:大连理工大学

学位:硕士

所在单位:能源与动力学院

办公地点:能源与动力学院718室

联系方式:13084159090

电子邮箱:lisuf@dlut.edu.cn

扫描关注

论文成果

当前位置: 中文主页 >> 科学研究 >> 论文成果

Intermittent experimental study of a vertical ground source heat pump system

点击次数:

论文类型:期刊论文

发表时间:2014-12-31

发表刊物:APPLIED ENERGY

收录刊物:SCIE、Scopus

卷号:136

页面范围:628-635

ISSN号:0306-2619

关键字:Ground source heat pump system (GSHPS); Intermittent operation; Soil temperature; Multiple nonlinear regressions

摘要:In this paper, the intermittent experiment of a vertical ground source heat pump (GSHP) system is investigated and the corresponding geo-temperature variations are studied. The performance of the GSHP system under intermittent operation and the comparisons of different intermittent modes are presented in the paper. The parameters of soil backfill material, air temperature and inlet volume flow rate are also investigated. Experimental results suggest that, due to the recovery in ground thermal energy in intermittent time, the heat exchange rate and the operation performance coefficient (COP) of the heat pump increases, and the compressor power decreases in the successive working. But an insufficient soil recovery time leads to a rapid decline of the performance parameters and the soil temperature. The temperature transports faster under large soil thermal conductivity conditions and the soil temperature decreases more quickly and recovers more slowly with larger inlet flow rate and lower weather temperature for different soil thermal diffusivities. Through multiple nonlinear regression analysis, a curve formula can be fitted to predict the soil temperature variations under intermittent operation of the ground source heat pump in winter, Dalian. It can be found that the soil temperature increases at an exponential function with each factor. (C) 2014 Elsevier Ltd. All rights reserved.