Cooling water

Report
BROAD Absorption Chiller Working Principle
and
Central A/C System
Lecturer-Bob
Absorption chiller Working Principle
Working Process
Elements
LiBr Solution


Boiling points are 1265℃ and 100℃
Concentrated LiBr solution has a
strong ability to absorb water vapor

Boiling point of water is only 4℃ in
6mmHg

Water evaporation absorbs a lot of
heat from chilled W. copper tubes
High Vacuum Condition
Evaporate Cooling
Circle
Cooling water heat = Cooling capacity + driving heat
Driving Heat
Generator
Hot, High
Pressure
Vapor
Cooling water
Condenser
Refrigerant water
Weak
Strong
Solution Solution
Absorber
Cooling water
Water vapor
Cool, Low
Pressure
Vapor
Evaporator
Heat
Chilled water
Condenser
LTG
HTG
(57mmHg)
(57mmHg, 90℃)
(690mmHg, 155℃)
heating
source
63%, 90℃
63%, 155℃
HTHE
LTHE
41℃
38℃
42℃
57%, 38℃
Evaporator
Absorber
(6mmHg, 4℃)
(6mmHg, 42℃)
38℃
concentrated
solution
diluted solution
refrigerant vapor
refrigerant water
cooling water
chilled water
Absorption Chiller Advantages
Environment friendly
No Freon
Take advantage of waste heat
Reduce CO2 emission
Quiet
long life span &
Low maintenance cost
Few moving parts
Life span is 25 years
Central A/C System
Schematic Diagram
Atmosphere
Chiller
Indoor
Terminal
Cooling Tower
Element
Chiller
Cooling Tower
Water Pump
Elements:
• Water pipe (seamless, zinc-plated steel…)
• Air duct (zinc-plated steel, glass fiber reinforced plastic…)
• Water/ Air valve:regulate/ cut off water/Air flow
• Water/ Air filter
• Others:
reduce heat loss / prevent surface dewing / avoid scalding
Terminals
Thank you!

similar documents