地层初始温度及结构对地埋管换热能力影响分析
|
摘要
不同地质条件下,地埋管的换热能力有所不同,热能采集和扩散能力存在差异。为给地埋管地源热泵系统工程提供科学合理的设计依据,本文利用现场热响应测试数据分析了地层初始温度以及地层结构对地埋管换热能力的影响。结果表明:地埋管换热能力与地层初始温度呈较好的线性相关性,地埋管夏季延米换热量随地层初始温度的升高而减少,冬季延米换热量随地层初始温度的升高而增加;不同地层结构,地埋管换热能力有所不同,在富水性相对较好、岩性颗粒粗、地下水径流速度快的区域,地埋管换热效果要优于富水性相对较差、岩性颗粒细、地下水径流速度慢的区域。
Under different geological conditions, the heat transfer capacity of the buried pipe is different, and the ability of thermal energy collection and diffusion is different too. In order to provide scientific and rational design basis for ground source heat pump system engineering, this paper studied the influence of initial temperature and structure of stratum on the heat transfer capacity of the buried pipe. The results show that the heat transfer capacity of the buried pipe is linearly related to the initial temperature of stratum. The heat exchange per meter decreases with the initial temperature of the stratum in summer and increases with the initial temperature of the stratum in winter. Under different structural conditions, the heat transfer capacity of the buried pipe is different. The heat transfer effect of the buried pipe is better in areas with higher water-richness, thicker lithologic grains and faster groundwater runoff than those with relatively poor water-richness, fine lithologic grains and slow groundwater runoff.
Under different geological conditions, the heat transfer capacity of the buried pipe is different, and the ability of thermal energy collection and diffusion is different too. In order to provide scientific and rational design basis for ground source heat pump system engineering, this paper studied the influence of initial temperature and structure of stratum on the heat transfer capacity of the buried pipe. The results show that the heat transfer capacity of the buried pipe is linearly related to the initial temperature of stratum. The heat exchange per meter decreases with the initial temperature of the stratum in summer and increases with the initial temperature of the stratum in winter. Under different structural conditions, the heat transfer capacity of the buried pipe is different. The heat transfer effect of the buried pipe is better in areas with higher water-richness, thicker lithologic grains and faster groundwater runoff than those with relatively poor water-richness, fine lithologic grains and slow groundwater runoff.
引文
蔡向民,郭高轩,栾英波,等,2009.北京山前平原区第四系三维地质结构调查方法研究[J].地质学报,83(7):1047-1057.
栾英波,卫万顺,于湲,等,2014.北京平原区地源热泵换热能力现场测试研究[J].现代地质,28(5):1046-1052.
唐凯,张旭,周翔,等,2011.不同地质气候条件对地埋管换热器的影响及其适宜性评价[C].中国制冷学会学术年会论文集,上海.
徐伟,刘志坚,2013.中国地源热泵技术发展与展望[J].建筑科学,29(10):26-33.
杨俊伟,冉伟彦,佟红兵,2011.地埋管换热孔换热系数及其在工程设计中的应用研究[J].技术应用,6(2):45-48.
岳丽艳,2012.垂直地埋管换热性能影响因素分析[D].
卫万顺,李宁波,冉伟彦,等,2010.中国浅层地温能资源[M].1版.北京:中国大地出版社.
栾英波,卫万顺,于湲,等,2014.北京平原区地源热泵换热能力现场测试研究[J].现代地质,28(5):1046-1052.
唐凯,张旭,周翔,等,2011.不同地质气候条件对地埋管换热器的影响及其适宜性评价[C].中国制冷学会学术年会论文集,上海.
徐伟,刘志坚,2013.中国地源热泵技术发展与展望[J].建筑科学,29(10):26-33.
杨俊伟,冉伟彦,佟红兵,2011.地埋管换热孔换热系数及其在工程设计中的应用研究[J].技术应用,6(2):45-48.
岳丽艳,2012.垂直地埋管换热性能影响因素分析[D].
卫万顺,李宁波,冉伟彦,等,2010.中国浅层地温能资源[M].1版.北京:中国大地出版社.