| 引用本文: | 肖益民,刘希臣,张华廷,付祥钊.竖直地埋管换热器的结构改进与性能试验[J].哈尔滨工业大学学报,2015,47(2):92.DOI:10.11918/j.issn.0367-6234.2015.02.017 |
| XIAO Yimin,LIU Xichen,ZHANG Huating,FU Xiangzhao.Contrast experiments on three different types of underground heat exchangers of GSHP system[J].Journal of Harbin Institute of Technology,2015,47(2):92.DOI:10.11918/j.issn.0367-6234.2015.02.017 |
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| 摘要: |
| 为了改进竖直埋管岩土换热器型式的换热性能,提出减小换热器热阻的结构改进设计方案,由三根进水管和一根较大管径的保温出水管构成．推导了结构改进后的换热器热阻理论计算式,计算结果表明,改进后换热器的热阻值比单U和双U型明显减小．在深度约96 m的钻孔内对改进型换热器和单U型、双U型换热器进行了多组加载热负荷试验, 结果显示: 改进后换热器的热阻比单U型减小29%～34%,比双U型减小10%～15%；系统循环水温升比双U型平均小1.5 ℃,换热性能有较明显提高． |
| 关键词: 地埋管换热器 土壤源热泵 热阻 温升 |
| DOI：10.11918/j.issn.0367-6234.2015.02.017 |
| 分类号:TK02 |
| 基金项目:国家自然科学基金(51178482). |
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| Contrast experiments on three different types of underground heat exchangers of GSHP system |
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XIAO Yimin1, LIU Xichen2, ZHANG Huating1, FU Xiangzhao1
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(1.Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment(Chongqing University), Ministry of Education, 400045 Chongqing, China; 2.China Southwest Architectural Design and Research Institute Co.,Ltd. 610041Chengdu, China)
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| Abstract: |
| Based on the deficiencies of existing ground heat exchangers, a new type energy-storage heat exchanger is proposed, which consists of three inlet pipes and one thermal insulation outlet pipe. Thermal resistance of this new type heat exchanger is calculated, which shows a much smaller value over conventional ones. Experimental measurements to evaluate the performance of single-U, double-U and the new design, were carried out in boreholes about 96 meters deep, which showed superior performance of the new type. The thermal resistance of the new type was 29%-34% and 10%-15% smaller than that of single-U and double-U respectively. The circulation water temperature rise of new type was 1.5 ℃ lower than double-U. |
| Key words: underground heat exchangers GSHP thermal resistance temperature rise |
