PPT: Refrigeration & Air Conditioning | Thermodynamics - Mechanical Engineering PDF Download

 Page 1


2
Refrigeration & Air Conditioning
•Introduction
•Type of refrigeration
•Types Of Air Conditioner
Page 2


2
Refrigeration & Air Conditioning
•Introduction
•Type of refrigeration
•Types Of Air Conditioner
3
Introduction
How does 
it work?
Refrigeration 
and air 
conditioning 
is used to 
cool products 
or a building 
environment. 
High Temperature Reservoir
Low Temperature Reservoir
R
Work Input
Heat Absorbed
Heat Rejected
Page 3


2
Refrigeration & Air Conditioning
•Introduction
•Type of refrigeration
•Types Of Air Conditioner
3
Introduction
How does 
it work?
Refrigeration 
and air 
conditioning 
is used to 
cool products 
or a building 
environment. 
High Temperature Reservoir
Low Temperature Reservoir
R
Work Input
Heat Absorbed
Heat Rejected
4
Introduction
• Small capacity modular units of direct 
expansion type (50 Tons of Refrigeration)
• Centralized chilled water plants with 
chilled water as a secondary coolant (50 
– 250 TR)
• Brine plants with brines as lower 
temperature, secondary coolant (>250 TR)
Refrigeration systems for industrial 
processes
Page 4


2
Refrigeration & Air Conditioning
•Introduction
•Type of refrigeration
•Types Of Air Conditioner
3
Introduction
How does 
it work?
Refrigeration 
and air 
conditioning 
is used to 
cool products 
or a building 
environment. 
High Temperature Reservoir
Low Temperature Reservoir
R
Work Input
Heat Absorbed
Heat Rejected
4
Introduction
• Small capacity modular units of direct 
expansion type (50 Tons of Refrigeration)
• Centralized chilled water plants with 
chilled water as a secondary coolant (50 
– 250 TR)
• Brine plants with brines as lower 
temperature, secondary coolant (>250 TR)
Refrigeration systems for industrial 
processes
5
Types of Refrigeration
• Vapour Compression Refrigeration 
(VCR): uses mechanical energy
• Vapour Absorption Refrigeration 
(VAR): uses thermal energy
• Magnetic Refrigeration: remove heat 
and maintain low temperature
• Industrial Refrigeration:used in cold 
storage
Refrigeration systems
Page 5


2
Refrigeration & Air Conditioning
•Introduction
•Type of refrigeration
•Types Of Air Conditioner
3
Introduction
How does 
it work?
Refrigeration 
and air 
conditioning 
is used to 
cool products 
or a building 
environment. 
High Temperature Reservoir
Low Temperature Reservoir
R
Work Input
Heat Absorbed
Heat Rejected
4
Introduction
• Small capacity modular units of direct 
expansion type (50 Tons of Refrigeration)
• Centralized chilled water plants with 
chilled water as a secondary coolant (50 
– 250 TR)
• Brine plants with brines as lower 
temperature, secondary coolant (>250 TR)
Refrigeration systems for industrial 
processes
5
Types of Refrigeration
• Vapour Compression Refrigeration 
(VCR): uses mechanical energy
• Vapour Absorption Refrigeration 
(VAR): uses thermal energy
• Magnetic Refrigeration: remove heat 
and maintain low temperature
• Industrial Refrigeration:used in cold 
storage
Refrigeration systems
6
Type of Refrigeration
Vapour Compression Refrigeration
• Highly compressed fluids tend to get 
colder when allowed to expand
• If pressure high enough
• Compressed air hotter than source 
of cooling
• Expanded gas cooler than desired 
cold temperature