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1、第33卷第8期中国电机工程学报Vol.33No.8Mar.15,20132013年3月15日ProceedingsoftheCSEE©2013Chin.Soc.forElec.Eng.1文章编号:0258-8013(2013)08-0001-08中图分类号:TK264文献标志码:A学科分类号:470⋅20回收循环水余热的热泵供热系统热力性能分析张学镭,陈海平(华北电力大学能源动力和机械工程学院,河北省保定市071003)ThermodynamicAnalysisofHeatPumpHeatingSupplySystemsWit
2、hCirculatingWaterHeatRecoveryZHANGXuelei,CHENHaiping(SchoolofEnergy,PowerandMechanicalEngineering,NorthChinaElectricPowerUniversity,Baoding071003,HebeiProvince,China)ABSTRACT:Heatrecoveryfromcirculatingwaterbasedon热方式进行了热力性能评价。结果表明,设计工况下,热泵absorptionheatpumpcanachie
3、vetheenergycascade性能系数为1.706,热泵供热方式的火用效率比传统供热方式utilization.Takeacertain300MWregulatedextractionsteam提高了11.17个百分点,机组功率增加4.63MW;冷凝器出turbineasanexample,thispaperstudiedthefeasibilityofheat口热网水温度的升高使热泵性能系数下降,但热泵供热方式pumpheatingsupplysystem(HPHSS)withcirculatingwater火用效率逐
4、渐增加;热网返回水温的降低使热泵性能系数升heatrecovery.Thethermodynamicmodel,whichconsidered高,但热泵供热方式火用效率呈先增大后减小的趋势;蒸发theinfluenceofheatrecoveryoncondenservacuum,was器出口循环水温度的升高或蒸发器内循环水温降的减小均proposedtosimulatetheHPHSSdesignandoff-design使热泵性能系数、机组功率增加量和热泵供热方式火用效率performancefromtheperspect
5、iveoftheoverallsystem.The增大。回收循环水余热的热泵供热方式具有良好的热力性能resultsindicatethatatdesigncondition,theheatpump和社会效益。coefficientofperformance(COP)is1.706,andHPHSSincreasesexergyefficientby11.17percentagepointsand关键词:热泵;循环水;余热利用;热力性能;供热系统increasestheunitoutputpowerby4.63MWcompar
6、edto0引言traditionalmode.Withtheincreaseincondenseroutletheatingnetworkwatertemperature,itdeclinestheheatpumpCOP,but能源危机已逐渐成为全球所面临的重要问题。increasesHPHSSexergyefficientgradually.Withthereduction由于煤炭、石油、天然气等储量有限以及燃用这些ofreturnwatertemperature,itincreasestheheatpumpCOP,能源所带
7、来的环境问题,近年来人们越来越重视能butincreasesfirstlyandthendecreasesHPHSSexergyefficient.量梯级利用及余热回收。我国北方城市季节性特征Enhancingtheevaporatoroutlettemperatureofcirculating明显,采暖期一般为4~6个月,因此该地区采暖供waterorreducingthecirculatingwatertemperaturedropinthe热的需求较大,利用大型区域性热电厂进行集中供evaporatorincreaseh
8、eatpumpCOP,unitoutputpowerand热,可节约能源、减少环境污染,具有较高的热经HPHSSexergyefficient.HPHSSwithcirculatingwaterheatrecoverypossessesthegoodthermodynamic