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作 者:汤昌福[1,2] 罗万静 黄骏玮 TANG Changfu;LUO Wanjing;HUANG Junwei(Exploration Research Institute,Anhui Provincial Bureau of Coal Geology,Hefei,Anhui 230088,China;Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei,Anhui 230026,China;School of Energy Resources,China University of Geosciences,Beijing 100083,China)
机构地区:[1]安徽省煤田地质局勘查研究院,安徽合肥230088 [2]中国科学技术大学热科学和能源工程系,安徽合肥230026 [3]中国地质大学(北京)能源学院,北京100083
出 处:《现代地质》2022年第5期1440-1446,共7页Geoscience
基 金:安徽省重点研究与开发计划项目(201904a07020105)
摘 要:从地下传热基本原理出发,考虑地温梯度影响,建立了中深层套管换热器进出口流体平均温度解析解和长时间近似解,推导了中深层套管换热器短期无干扰名义取热量计算解析公式,并通过与文献中结果对比进行了验证。研究结果表明,中深层套管换热器短期无干扰名义取热量是地温梯度的线性函数。短期无干扰名义取热量计算解析公式简单实用,可以实现中深层套管换热器短期换热性能快速评价。Based on basic underground heat transfer mechanism,an analytical solution of the mean inlet and outlet fluid temperature,accounting for the geothermal gradient effect is formulated for deep coaxial heat exchanger.An approximate solution is also derived.Furthermore,a method for calculating short-term non-interference nominal heat rate of deep coaxial heat exchangers is developed and validated by comparison with published results.It is revealed that the nominal heat rate is a linear function of geothermal gradient.The analytical method proposed here is very practical and requires less computation cost,which enables rapid evaluation of short-term thermal capacity of deep coaxial heat exchangers.
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