岩土热响应散热修正瞬态模拟及关键参数研究
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摘要
提出一种带散热修正的地埋管储热的TRNSYS瞬态计算模型,考虑管道散热及地表空气对流散热损失;在山东省滨州市进行实地热响应测试,通过对实验测试井供回水温度的模拟,验证模型准确性。同时,模拟分析循环流量、加热功率等关键参数对岩土导热系数、钻孔热阻、延米换热量辨识精度的影响。研究结果表明,测试持续时间对岩土导热系数辨识精度影响高达24.88%,其次分别是加热功率、初始舍弃时间、循环流量、回填材料导热系数。加热功率对延米换热量影响最高达75.01%。
Based on the duct ground heat storage model on TRNSYS software,a thermal-dissipation-corrected transient model which takes the heat dissipation from ground and testing tube surfaces into consideration is established. An experimental platform is built for in-situ thermal response test(in-situ TRT)in Shandong Province and the presented model is verified by in-situ TRT for similar inlet and outlet temperatures of borehole heat exchanger(BHE).Furthermore,the key parameters,such as injected heat power,circulation flowrate,etc. are analyzed to study the influences on identified soil thermal conductivity,borehole thermal resistance and heat flow per unit length. It is showed that test duration has largest 24.88% impact on identification precision of soil thermal conductivity,followed by injected heat power,abandoned initial time,the circulation flowrate and backfill material conductivity;The injected heat power has the biggest influence on heat flow per unit length of 75.01% than testing results.
Based on the duct ground heat storage model on TRNSYS software,a thermal-dissipation-corrected transient model which takes the heat dissipation from ground and testing tube surfaces into consideration is established. An experimental platform is built for in-situ thermal response test(in-situ TRT)in Shandong Province and the presented model is verified by in-situ TRT for similar inlet and outlet temperatures of borehole heat exchanger(BHE).Furthermore,the key parameters,such as injected heat power,circulation flowrate,etc. are analyzed to study the influences on identified soil thermal conductivity,borehole thermal resistance and heat flow per unit length. It is showed that test duration has largest 24.88% impact on identification precision of soil thermal conductivity,followed by injected heat power,abandoned initial time,the circulation flowrate and backfill material conductivity;The injected heat power has the biggest influence on heat flow per unit length of 75.01% than testing results.
引文
[1]张锦玲.基于遗传算法的岩土热物性参数确定方法研究[D].武汉：华中科技大学，2009.[1]Zhang Jinling.Studying of determination of the thermal properties of geotechnical parameters based on genetic algorithm[D].Wuhan:Huazhong University of Science&Technology,2009.
[2]赵飞.现场岩土热响应测试及数据处理分析方法研究[D].西安：西安建筑科技大学，2013.[2]Zhao Fei.In-situ soil thermal response test and its data processing methods studies[D].Xi’an:Xi’an University of Architecture and Technology,2013.
[3]Florides G,Kalogirou S.Ground heat exchangers-a review of systems,models and applications[J].Renewable Energy,2007,32(15):2461-2478.
[4]于明志，彭晓峰，方肇洪，等.基于线热源模型的地下岩土热物性测试方法[J].太阳能学报，2006,27(3):279-283.[4]Yu Mingzhi,Peng Xiaofeng,Fang Zhaohong,et al.Line source method for measuring thermal properties of deep ground[J].Acta Energiae Solaris Sinica,2006,27(3):279-283.
[5]黄光勤，卢军，陈鹏.瞬态热流岩土热响应测试研究[J].太阳能学报，2013,34(10):1787-1794.[5]Huang Guangqin,Lu Jun,Chen Peng.Thermal response test of transient heating flux soil[J].Acta Energiae Solaris Sinica,2013,34(10):1787-1794.
[6]蔡颖玲，张华，徐辉，等.基于TRNSYS的岩土热响应测试及影响因素分析[J].暖通空调，2016,46(9):135-140.[6]Cai Yingling,Zhang Hua,Xu Hui,et al.Soil thermal response test and analysis of influence factors based on TRNSYS[J].Journal of HV&AC,2016,46(9):135-140.
[7]Bandos T V,Monteroá，de Córdoba P F,et al.Improving parameter estimates obtained from thermal response tests:Effect of ambient air temperature variations[J].Geothermics,2011,40(2):136-143.
[8]刁乃仁，方肇洪.地埋管地源热泵技术[M].北京：高等教育出版社，2006,47-54.[8]Diao Nairen,Fang Zhaohong.Ground-coupled heat pump technology[M].Beijing:Higher Education Press,2006,47-54.
[9]王沣浩，颜亮，冯琛琛，等.地源热泵岩土导热系数测试影响因素分析[J].制冷学报，2012,33(4):16-22.[9]Wang Fenghao,Yan Liang,Feng Chenchen,et al.Analysis of influencing factors on soil thermal conductivity test in ground source heat pump[J].Journal of Refrigeration,2012,33(4):16-22.
[10]Nordell B,Hellstr?m G.High temperature solar heated seasonal storage system for low temperature heating of buildings[J].Solar Energy,2000,69(6):511-523.
[11]雷飞，胡平放，黄素逸，等.地埋管换热器G函数插值法及应用[J].太阳能学报，2013,34(6):1057-1062.[11]Lei Fei,Hu Pingfang,Huang Suyi,et al.Application of G-functions interpolation approach for geothermal heat exchangers[J].Acta Energiae Solaris Sinica,2013,34(6):1057-1062.
[12]王勇.动态负荷下地源热泵性能研究[D].重庆：重庆大学，2006.[12]Wang Yong.The influence of dynamic load on ground source heat pump system performance[D].Chongqing:Chongqing University,2006.
[13]Austin W A,Yavuzturk C,Spitler J D.Development of an in-situ system for measuring ground thermal properties[J].Ashrae Transactions,1998,106(1):365-379.
[14]Witte H J L,Gelder G J V,Spitler J D.In situ measurement of ground thermal conductivity:The dutch perspective[J].Ashrae Transactions,2002,108(1):263-272.
[2]赵飞.现场岩土热响应测试及数据处理分析方法研究[D].西安：西安建筑科技大学，2013.[2]Zhao Fei.In-situ soil thermal response test and its data processing methods studies[D].Xi’an:Xi’an University of Architecture and Technology,2013.
[3]Florides G,Kalogirou S.Ground heat exchangers-a review of systems,models and applications[J].Renewable Energy,2007,32(15):2461-2478.
[4]于明志，彭晓峰，方肇洪，等.基于线热源模型的地下岩土热物性测试方法[J].太阳能学报，2006,27(3):279-283.[4]Yu Mingzhi,Peng Xiaofeng,Fang Zhaohong,et al.Line source method for measuring thermal properties of deep ground[J].Acta Energiae Solaris Sinica,2006,27(3):279-283.
[5]黄光勤，卢军，陈鹏.瞬态热流岩土热响应测试研究[J].太阳能学报，2013,34(10):1787-1794.[5]Huang Guangqin,Lu Jun,Chen Peng.Thermal response test of transient heating flux soil[J].Acta Energiae Solaris Sinica,2013,34(10):1787-1794.
[6]蔡颖玲，张华，徐辉，等.基于TRNSYS的岩土热响应测试及影响因素分析[J].暖通空调，2016,46(9):135-140.[6]Cai Yingling,Zhang Hua,Xu Hui,et al.Soil thermal response test and analysis of influence factors based on TRNSYS[J].Journal of HV&AC,2016,46(9):135-140.
[7]Bandos T V,Monteroá，de Córdoba P F,et al.Improving parameter estimates obtained from thermal response tests:Effect of ambient air temperature variations[J].Geothermics,2011,40(2):136-143.
[8]刁乃仁，方肇洪.地埋管地源热泵技术[M].北京：高等教育出版社，2006,47-54.[8]Diao Nairen,Fang Zhaohong.Ground-coupled heat pump technology[M].Beijing:Higher Education Press,2006,47-54.
[9]王沣浩，颜亮，冯琛琛，等.地源热泵岩土导热系数测试影响因素分析[J].制冷学报，2012,33(4):16-22.[9]Wang Fenghao,Yan Liang,Feng Chenchen,et al.Analysis of influencing factors on soil thermal conductivity test in ground source heat pump[J].Journal of Refrigeration,2012,33(4):16-22.
[10]Nordell B,Hellstr?m G.High temperature solar heated seasonal storage system for low temperature heating of buildings[J].Solar Energy,2000,69(6):511-523.
[11]雷飞，胡平放，黄素逸，等.地埋管换热器G函数插值法及应用[J].太阳能学报，2013,34(6):1057-1062.[11]Lei Fei,Hu Pingfang,Huang Suyi,et al.Application of G-functions interpolation approach for geothermal heat exchangers[J].Acta Energiae Solaris Sinica,2013,34(6):1057-1062.
[12]王勇.动态负荷下地源热泵性能研究[D].重庆：重庆大学，2006.[12]Wang Yong.The influence of dynamic load on ground source heat pump system performance[D].Chongqing:Chongqing University,2006.
[13]Austin W A,Yavuzturk C,Spitler J D.Development of an in-situ system for measuring ground thermal properties[J].Ashrae Transactions,1998,106(1):365-379.
[14]Witte H J L,Gelder G J V,Spitler J D.In situ measurement of ground thermal conductivity:The dutch perspective[J].Ashrae Transactions,2002,108(1):263-272.