1、制冷系统组成,Vapor-Compression Refrigeration,expansion device,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
2、,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,AI,subcooling,refrigeration effect,DI,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 refrigeran
3、t,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 coolin
4、g 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,con
5、denser,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 air
6、flow,fan A,fan B,fan A,damper,A,B,冷凝器溢流控制,evaporator,compressor,liquid receiver,B,A,C,condenser,expansion valve,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,li
7、quid 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: Temper
8、ature 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 Ar
9、rangement,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,
10、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 M
11、Pa,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,
12、Too little superheat: Risk of damage to compressor by liquid refrigerantToo 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,expansio
13、n 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,compresso
14、r,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,shutoff valve,liquid-line filter drier,evaporator,检修口,liquid line access port,suction line acc
15、ess 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-cooled condenser,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,
