第23卷第1期2023年1月REFRIGERATIONANDAIR-CONDITIONING33-37收稿日期:2022-04-07,修回日期:2022-05-16作者简介:陈飞,硕士,主要从事低温与制冷、单螺杆压缩机方面的研究。通信作者:吴玉庭,研究员、博士生导师,主要从事高温高热流传热蓄热、低品位能源高效热功转换、先进制冷技术以及太阳能热发电等方面的研究。喷液对单螺杆压缩机性能影响的热力学分析陈飞吴玉庭沈纪东张大鹏温强宇(北京工业大学环境与生命学部,传热强化与过程节能教育部重点实验室)摘要通过Excel软件计算,对螺杆直径为117mm的单螺杆压缩机进行了热力学计算,使用的工质为R22制冷剂,绘制了压缩机在设定工况下工作的压焓图,模拟计算了压缩机在开启喷液的情况下,压缩机的排气温度,制冷量,压缩机功率和COP的变化情况。计算结果表明:喷液量从主路流量的0%增加到5%,排气温度从102.26℃降低到86.6℃,降低15.31%;蒸发器的制冷量从32kW下降到30.4kW,制冷量下降了5%;压缩机功率从12.87kW降低到10.85kW,下降15.6%;系统的制冷系数COP从2.48增加到2.80,COP提升了12.9%。关键词喷液;COP;单螺杆压缩机;排气温度Thermodynamicanalysisoftheeffectofsprayontheperformanceofsingle-screwcompressorChenFeiWuYutingShenJidongZhangDapengWenQiangyu(FacultyofEnvironmentandLife,BeijingUniversityofTechnology,KeyLaboratoryofHeatTransferEnhancementandEnergyConservationofEducationMinistry)ABSTRACTThethermodynamiccalculationofsinglescrewcompressorwithscrewdiam-eterof117mmwascarriedoutbyexcelcalculationsoftware.TheworkingfluidwasR22refrigerant,andthepressureenthalpydiagramofthecompressorunderthesetwork-ingconditionwasdrawn.Thechangesofexhausttemperature,refrigeratingcapacity,com-pressorpowerandCOPofthecompressorundertheconditionofopeninginjectionweresimulated.Thecalculationresultsshowthattheinjectionvolumeincreasesfrom0%ofthemainflowto5%,andtheexhausttemperaturedecreasesfrom102.26℃to86.6℃,whichdecreasesby15.31%.Thecoolingcapacityoftheevaporatordecreasedfrom32kWto30.4kW,andthecoolingcapacitydecreasedby5%.Compressorpowerdecreasedfrom12.87kWto10.85kW,down15.6%;theCOPofthesystemincreasedfrom2.48to2.80andincreasedby12.9%.KEYWORDSinjection;COP;singlescrewcompressor;dischargetemperature近年来,我国对冷链设施的需求在不断加...
