Air Conditioning Clinic TRG-TRC005-EN
Centrifugal Fan Air-Cooled Condenser
condenser coil
centrifugal fan
© American Standard Inc. 1999 Air Conditioning Clinic TRG-TRC005-EN
Water-Cooled Condenser
95ºF hot, refrigerant vapor
[35ºC]
cooling water 85ºF
[29ºC]
subcooled, liquid refrigerant
© American Standard Inc. 1999
subcooler
Air Conditioning Clinic TRG-TRC005-EN
© American Standard Inc. 1999
Air Conditioning Clinic TRG-TRC005-EN
Evaporator Control

Evaporator capacity is influenced by:
Temperature Flow Flow
variablespeed drive
cooling tower
condenser
cooling tower
bypass pipe
diverting valve
condenser
© American Standard Inc. 1999 Air Conditioning Clinic TRG-TRC005-EN
Evaporative Condenser
fan
refrigerant vapor
condenser coil pump subcooler
Air Conditioning Clinic TRG-TRC005-EN
sump
© American Standard Inc. 1999
liquid refrigerant
subcooler
Air Conditioning Clinic TRG-TRC005-EN
Effect of Subcooling
subcooling
D
pressure
C
{
DI
AI B refrigeration effect enthalpy
A
© American Standard Inc. 1999
Air Conditioning Clinic TRG-TRC005-EN
Finned-Tube Evaporator Control
expansion valve evaporator
liquid refrigerant
refrigerant vapor
© American Standard Inc. 1999
Condenser Control

Condenser capacity is influenced by:
Temperature Flow Flow
difference between refrigerant and cooling media
rate of cooling media through condenser rate of refrigerant through condenser
refrigerant vapor liquid/vapor refrigerant
Air Conditioning Clinic TRG-TRC005-EN
tube bundle
© American Standard Inc. 1999
Shell-and-Tube Evaporator
baffles
Air Conditioning Clinic TRG-TRC005-EN
Face-Split Arrangement
distributors
© American Standard Inc. 1999
Air Conditioning Clinic TRG-TRC005-EN
Face-Split Arrangement
refrigerant vapor
© American Standard Inc. 1999 Air Conditioning Clinic TRG-TRC005-EN
Turbulent Flow
© American Standard Inc. 1999
Air Conditioning Clinic TRG-TRC005-EN
© American Standard Inc. 1999
Air Conditioning Clinic TRG-TRC005-EN
Air-Cooled Condenser
propeller fan
outdoor air condenser coil
© American Standard Inc. 1999
condenser
condenser water pump
© American Standard Inc. 1999 Air Conditioning Clinic TRG-TRC005-EN
Vary Condenser Water Flow Rate
cooling tower
cooling tower
Condenser Flooding Control
B C A liquid receiver
condenser
expansion valve
evaporator
discharge line
© American Standard Inc. 1999
compressor
Air Conditioning Clinic TRG-TRC005-EN
© American Standard Inc. 1999
Air Conditioning Clinic TRG-TRC005-EN
Condenser Capacity
full load condenser heat rejection capacity full load pressure
part load
Refrigeration System Components
© American Standard Inc. 1999
Air Conditioning Clinic TRG-TRC005-EN
Vapor-Compression Refrigeration
condenser
expansion device
difference between refrigerant and air or water being cooled
rate of air or water through evaporator rate of refrigerant through evaporator
© American Standard Inc. 1999
Cooling Tower
propeller fan sprays
fill
outdoor air
sump
[29ºC]
© American Standard Inc. 1999
85ºF
to condenser
from connditioning Clinic TRG-TRC005-EN
Superheat
B A
B A C
© American Standard Inc. 1999
C superheat
Air Conditioning Clinic TRG-TRC005-EN
{
Shell-and-Tube Evaporator
chilled water supply baffles chilled water return
80ºF
[27ºC]
55ºF 80ºF 30ºF
[-1.1ºC]
[13ºC]
[27ºC]
© American Standard Inc. 1999
Air Conditioning Clinic TRG-TRC005-EN
D pressure
condenser
C compressor
A
evaporator
B
enthalpy
© American Standard Inc. 1999 Air Conditioning Clinic TRG-TRC005-EN
Refrigeration Cycle
D pressure expansion device A
Finned-Tube Evaporator
liquid/vapor refrigerant
airflow
liquid distributor
suction header
© American Standard Inc. 1999
refrigerant vapor
Air Conditioning Clinic TRG-TRC005-EN
compressor
evaporator
© American Standard Inc. 1999 Air Conditioning Clinic TRG-TRC005-EN
Refrigeration System Components
period one
Refrigeration Cycle
© American Standard Inc. 1999
Air-Cooled Condenser Control
damper condenser airflow