重庆地区垂直双U地埋管换热器保温性能研究

发布时间：2018-05-04 23:22

本文选题：层换热理论 + 土壤源热泵　；参考：《湖南大学学报(自然科学版)》2014年11期

【摘要】：以层换热理论为基础,重庆某示范楼工程土壤源热泵系统为对象,建立实验系统,测试了实际运行状况下的地埋管换热器供回水管不同深度的水温.从地埋管不同时刻的平均水温和换热能效两个方面分析了实测数据,研究了回水管保温与不保温时垂直双U地埋管换热器的换热情况.结果表明,在冬季,保温地埋管典型日不同时刻的换热能效比不保温的高出14.09%,月平均换热能效比不保温的高出23.08%,季平均换热能效比不保温的高出40.54%.在夏季,保温地埋管典型日不同时刻换热能效比不保温的高出10.76%,月平均换热能效比不保温的高出28.57%;季平均换热能效比不保温的高出41.48%,回水管保温有利于加大地埋管换热器的换热能力.
[Abstract]:Based on the theory of layer heat transfer, the ground-source heat pump system of a demonstration building in Chongqing was established, and the water temperature of different depths of the backwater pipe was tested under the actual operation condition of the ground-buried tube heat exchanger. The measured data are analyzed from the two aspects of average water temperature and heat transfer efficiency of buried pipes at different times. The heat transfer of vertical double U ground heat exchangers with or without backwater pipes is studied. The results show that, in winter, the heat transfer energy efficiency of thermal insulation buried pipe at different times on typical days is 14.09 higher than that without heat preservation, the monthly average heat transfer energy efficiency is 23.08 higher than that without heat preservation, and the seasonal average heat transfer energy efficiency is 40.54 minutes higher than that without heat preservation. In summer, The heat transfer energy efficiency of the buried tube at different times is 10.76 higher than that of the one without heat preservation, and the monthly average heat transfer energy efficiency is 28.57 higher than that of the one without heat preservation, and the seasonal average heat transfer energy efficiency is 41.48% higher than that of the one without heat preservation, and the heat transfer capacity of the ground buried tube heat exchanger is increased by the backwater pipe heat preservation.
【作者单位】：重庆大学低碳绿色建筑国际联合研究中心;重庆大学三峡库区生态环境教育部重点实验室;宿迁市建设工程质量安全监督站;
【基金】：“十二五”国家科技计划项目(2013BAJ11B05)
【分类号】：TU83;TK172

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