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地埋管地源热泵系统的设计监控及测评重庆大学硕士学位论文学生姓名：邢鼎鼎指导教师：卢军教授专业：供热、供燃气、通风及空调工程学科门类：工学重庆大学城市建设与环境工程学院二O一一年四月Design，Monitoring,TestingandAssessmentforGround-sourceHeatPumpSystemAThesisSubmittedtoChongqingUniversityinPartialFulfillmentoftheRequirementfortheDegreeofMasterofEngineeringByXingDingdingSupervisedbyProf.LuJunMjor:Heating,Gassing,VentilatingandAir-conditioningEngineeringFacultyofUrbanConstruction&EnvironmentalEngineeringofChongqingUniversity,Chongqing,China.Apr.2011中文摘要I摘要随着社会的发展，能源紧缺对人类经济社会的发展和资源环境的制约越来越显著。可持续发展已经成为全球关注的焦点之一。由于地埋管地源热泵系统高能效无热污染等优点，越来越受到人们的广泛关注。介绍了岩土热响应测试的原理及方法，用自行设计研发的岩土热响应测试装置，对重庆地区2个单U型地埋管进行了不同加热量热响应测试，采用线热源理论计算了土壤导热系数。并对不同换热量下地埋管的换热特性及运行进行了分析研究，得出采用线热源模型，以符合地源热泵高效运行的加热量进行热响应测试至少要进行40h才能计算得到稳定合理的土壤导热系数;地源热泵运行前期热量主要用于钻孔内循环水、回填材料及管壁的温升，加热量越大，温度上升越快；运行后期以钻孔内的热量向钻孔外热容量较大的土壤传递释放为主，传热量稳定，钻孔内温度上升减缓；合适的换热量才有利于地源热泵的长期稳定运行。从逐时负荷模拟得出重庆大学农学院工程全年累计热负荷为81671.05kW•h，全年累计冷负荷为1315562.76kW•h，属于典型的冷负荷占主导的建筑，若夏季机组能效比取4.4，冬季机组能效比取3.5，则负荷不平衡率达96%。为平复冬夏释热量设计采用冷却塔地埋管复合式地源热泵系统，并给出优化控制策略。通过对中国人民银行重庆营业管理部附属用房及其它特殊用房的地源热泵系统的冬夏季检测，该系统运行性能良好，室内温湿度稳定满足人体舒适度，系统能效比在夏季达到4.4，冬季达到3.6。本建筑为办公建筑，属于间歇运行模式。在夏季冷负荷大于冬季热负荷的情况下，此工程的地埋管换热器满足夏季为主进行设计，并且双U埋管选取保守值70w/m,进行计算。因此，地温恢复良好，在夏季和冬季进行测试的第二天，在负荷相同的情况下，冷凝水均能达到和前一天运行的相同温度。但此自控系统的灵敏度和精确度都不高，对工作人员精确的了解本系统的工作特性有一定的影响。地埋管地源热泵系统设计及控制策略具有因地制宜的特点，需要考虑具体建筑所处地的气候特征，建筑功能的负荷特性，地质特点等因素进行设计及优化控制策略。协助编制重庆市地埋管地源热泵系统技术规程，本文所涉及的设计检测和验收均依照规程，适应重庆地区的特点。关键词：地埋管地源热泵，热响应测试，能效检测，运行特性，技术规程重庆大学硕士学位论文II英文摘要IIIABSTRACTWithsocietydeveloping,itisnotablethateconomydeveloping,sourcesandenvironmentalarerestrictedbyenergysourcesshortage.Sustainabledevelopmenthasbeentooneoftheglobalfocuses.Owningtotheadvantageofthehighenergyefficiencyandzeroheatpollutionandsoon,researchershavepaidcloseattentiontotheGroundSourceHeatPump.ThistexthascalculatedthegroundphysicalpropertyparametersinChongqingbythermalcorrespondingtest,whichisrecommendedbynationalstandard.Then,thistexthascalculatedthelengthofthegroundsourceheatpumpexchangerintheprojectofChongqingUniversityAgricultureCollegeusingthesetestingvalues.Twodrillholeshavebeentested.Thermalconductivitycalculatingwithline-heat-resourcemodelare2.97W/m•Kand2.83W/m•K.Engineeringdesigncalculationusetheaverageofthesetwovalues.Withtheincreasingoftheheatexchangebetweentheheatexchangerandsoil,thewatertemperaturewentuprapidly.Afterstabilizing,watertemperaturescontinuetoriseandtheheatpumphaslowefficiencywithsystemhavingbadstability.Thethermalcorrespondingtestshouldbeperformed40htocalculateasteadyreasonablecoefficientofheatconductivitywithline-heat-resourcemode.AccumulativetotalheatingloadofChongqingUniversityAgriculturalCollegeis81671.05kW•h.Accumulativetotalcoolingloadis1315562.76kW•h.itisacoolingloadleadingarchitecture.Theimbalanceratiocomesto96%.ThehybridGSHPisdesignedtobalancetheheatreleasingandheataccumulating.DetectingtheGroundSourceHeatPumpinChongqingadministrativedepartmentbranchofPeople'sBankofChina,thissystemperformancewaswell.Indoortemperatureandhumiditymeetthecomfortlevel.Thesystemenergyefficiencyreachesto4.4insummerand3.6inwinter.Officebuildingsystemisintermittentoperation.Thisgroundsourceheatpumpexchangerwasdesignedaccordingtocoolingloadontheconditionofcoolingloadisgreaterthanheatingloadanddouble-Uheatexchangerpipewascalculatingaccordingto70w/m.Therefore,groundtemperaturerecoveredverywellontheseconddaytestinginsummerorwinter.However,thisautomaticcontrolsystemhaslowsensitivityandaccuracy.Thiscanaffecttheworkertoknowtheperformancecharacteristicofthissystem.TheGroundSourceHeatPumpsystemdesignshavethecharacteradjusting重庆大学硕士学位论文IVmeasurestolocalconditions.Thedesignershouldconsidertheclimatecharacter,loadcharacteristicsofdifferentbuildingfunction,geologicalconditionsandsoontooptimizedesignandcontrolstrategy.ThisauthorhaveassistedsupervisortocompilethegroundsourceheatpumpcodeinChongqing.ThedesignandtestinginthistextallaccordedtothiscodeandadapttothecharacteristicsinChongqing.Keywords:GroundSourceHeatPump,ThermalResponseTest,EnergyEfficiencyDetection,PerformanceofOperation,GroundSourceHeatPumpCode目录V目录中文摘要..........................................................................................................................................I英文摘要.......................................................................................................................................III1绪论.........................................................................................................................................11.1引言......................................................................................................................................11.1.1能源危机的出现......................................................................................................11.1.2可再生能源的开发和利用......................................................................................11.2土壤源热泵的起源和发展..................................................................................................21.2.1地埋管地源热泵在国外的发展情况......................................................................21.2.2地埋管地源热泵在国内的发展情况......