制冷系统组成.ppt

Click to edit Master title style,Click to edit Master text styles,Second level,Third level,制冷系统组成,Vapor-Compression Refrigeration,expansiondevice,condenser,compressor,evaporator,第一部分,制冷循环,制冷系统组成,A,B,压力,焓,蒸发,制冷循环,A,C,compressor,pressure,enthalpy,evaporator,制冷循环,B,A,condenser,pressure,enthalpy,evaporator,制冷循环,B,C,compressor,D,expansion,device,A,D,condenser,pressure,enthalpy,evaporator,制冷循环,B,C,compressor,第二部分,冷凝器,制冷系统组成,subcooler,outdoor air,condenser coil,propeller,fan,风冷式冷凝器,A,D,pressure,enthalpy,B,C,Effect of Subcooling,A,I,subcooling,refrigeration,effect,D,I,离心式风扇,-,风冷式冷凝器,centrifugal,fan,condenser coil,蒸发式冷凝器,sump,pump,condenser coil,refrigerant vapor,subcooler,fan,liquid refrigerant,cooling water,subcooled,liquid refrigerant,subcooler,水冷式冷凝器,hot,refrigerant vapor,29C,35C,冷却塔,sprays,from condenser,to condenser,sump,propeller,fan,outdoor,air,29C,35C,fill,冷凝器控制,Condenser capacity is influenced by:,Temperature difference between refrigerant and cooling media,Flow rate of cooling media through condenser,Flow rate of refrigerant through condenser,pressure,enthalpy,full load condenser heat rejection capacity,part load,full load,Condenser Capacity,part load condenser heat rejection capacity,冷凝温度控制,condenser water pump,flow-regulating valve,condenser,可变冷凝器水流量,cooling tower,condenser,variable-speed drive,condenser,cooling tower,bypass pipe,diverting valve,cooling tower,condenser,variable-speed drive,condenser,cooling tower,bypass pipe,diverting valve,可变进水温度,condenser,bypass pipe,cooling tower,冷却塔旁通,diverting,valve,4C,18C,13C,风冷式冷凝器控制,heat rejection capacity,condenser airflow,fan,A,fan,B,fan,A,damper,A,B,冷凝器溢流控制,evaporator,compressor,liquid receiver,B,A,C,condenser,expansionvalve,discharge line,第三部分,蒸发器,制冷系统组成,Finned-Tube Evaporator,refrigerant vapor,liquid/vapor refrigerant,airflow,Turbulent Flow,Finned-Tube Evaporator,liquid/vapor refrigerant,refrigerant vapor,liquid,distributor,airflow,suction,header,Superheat,superheat,A,C,B,A,C,B,Shell-and-Tube Evaporator,refrigerant vapor,chilled water return,chilled water supply,tube bundle,baffles,liquid/vapor refrigerant,Shell-and-Tube Evaporator,baffles,Evaporator Control,Evaporator capacity is influenced by:,Temperature difference between refrigerant and air or water being cooled,Flow rate of air or water through evaporator,Flow rate of refrigerant through evaporator,Finned-Tube Evaporator Control,expansion valve,refrigerant vapor,evaporator,liquid refrigerant,Face-Split Arrangement,distributors,Face-Split Arrangement,27C,-1.1C,13C,inactive coil,active coil,27C,Intertwined Arrangement,Row-Split Arrangement,Row-Split Arrangement,27C,13C,21C,Shell-and-Tube Evaporator Control,refrigerant vapor,liquid refrigerant,expansion valve,shell-and-tube,evaporator,第四部分,膨胀装置,制冷系统组成,膨胀装置,expansion,device,A,D,condenser,pressure,enthalpy,evaporator,B,C,compressor,热力膨胀阀,热力膨胀阀,(TXV),液汽混合物,制冷剂气体,蒸发器,A,液体制冷剂,TXV Control,liquid/vapor mixture,refrigerant vapor,A,liquid refrigerant,TXV Control,liquid/vapor mixture,liquid refrigerant,过热,superheated,vapor,TXV,2 MPa,42.8C,0.59 MPa,5C,A,liquid refrigerant,过热,TXV,9.4C,0.54 MPa,2 MPa,42.8C,0.59 MPa,5C,TXV Operation,external equalizer,remote bulb,evaporator,spring,suction line,distributor,diaphragm,TXV Operation,valve pin,suction line,spring,94C,0.54 MPa,0.67 MPa,0.54 MPa,0.13 MPa,valve diaphragm,TXV Operation,TXV,external equalizer,remote,bulb,A,B,C,Superheat Setting,Too little superheat:,Risk of damage to compressor by liquid refrigerant,Too much superheat:,Reduction of system efficiency,Potential of coil frosting,Risk of compressor damage due to overheating,第五部分,附件,制冷系统组成,电磁阀电磁阀,finned-tube evaporator,solenoid,valves,expansion,valve,电磁阀,solenoid valve,expansion,valve,evaporator,liquid line,condenser,compressor,discharge,line,suction,line,液体管干燥过滤器,solenoid valve,expansion,valve,liquid-line filter drier,evaporator,liquid line,液体管干燥过滤器,replaceable core type,sealed type,core,湿度指示视液镜,sight,glass,expansion,valve,liquid line,吸气管过滤器,suction,line filter,compressor,suction line,吸气管过滤器,replaceable core type,sealed type,排气消声器,hot gas muffler,reciprocating compressor,discharge line,shell,perforated tube,截止阀,shutoff,valve,shutoff,valves,liquid line,condenser,compressor,shutoffvalve,liquid-line filter drier,evaporator,检修口,liquid line access port,suction line access ports,condenser,compressor,evaporator,第六部分,复习,制冷系统组成,复习,第一部分,expansion,device,A,D,condenser,pressure,enthalpy,evaporator,B,C,compressor,复习,第二部分,air-cooledcondenser,water-cooled condenser,evaporative condenser,复习,第三部分,finned-tube evaporator,shell-and-tube evaporator,复习,第四部分,external equalizer,remote bulb,evaporator,TXV,复习,第五部分,sight,glass,solenoid valve,access port,shutoff valve,TXV,condenser,evaporator,compressor,liquid-line filter drier,suction,line filter,