BROAD Absorption Chiller Working Principle and Central A/C System Lecturer-Bob.
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Transcript of BROAD Absorption Chiller Working Principle and Central A/C System Lecturer-Bob.
BROAD Absorption Chiller Working Principle
andCentral A/C System
Lecturer-Bob
Absorption chiller Working Principle
Working Process
Elements
High Vacuum Condition
LiBr Solution
Evaporate Cooling
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
Circle
Condenser
Evaporator
Heat
Generator
Absorber
StrongSolution
Driving Heat
Hot, HighPressureVapor
Cool, LowPressureVapor
Refrigerant water
Water vapor
WeakSolution
Chilled water
Cooling water
Cooling water heat = Cooling capacity + driving heat
Cooling water
concentrated solution diluted solution refrigerant vapor refrigerant water cooling water chilled water
HTG (690mmHg, 155 )℃
heating source
Evaporator(6mmHg, 4 )℃
LTHE
Absorber(6mmHg, 42 )℃
HTHE
LTG (57mmHg, 90 )℃
Condenser(57mmHg)
38℃
63%, 155℃
42℃
63%, 90℃
41℃ 38℃
57%, 38℃
Absorption Chiller Advantages
long life span & Low maintenance cost Few moving partsLife span is 25 years
Environment friendlyNo FreonTake advantage of waste heatReduce CO2 emission Quiet
Central A/C System
Schematic Diagram
Indoor Terminal
Chiller
Atmosphere
Cooling Tower
Element
Chiller Terminals
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
Thank you!