制冷系统组成

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