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TRANSCRIPT
ACTIVE LEARNING PROCESS
Prepared By :
Dishant Panchal 13BECEG112
Neeshit Kaushik 13BECEG122
Neel Panchal 13BECEG116
Guided By :Prof. Jugal Panchal
Branch: Computer Engineering
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Training Agenda: Refrigeration &
Air Conditioning
Introduction
Type of refrigeration
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
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Introduction
Thermal energy moves from left to right through five
loops of heat transfer:
How does it work?
(Bureau of Energy Efficiency, 2004)
1)
Indoor air
loop
2)
Chilled
water loop
3)
Refrigerant
loop
4)
Condenser
water loop
5)
Cooling
water loop
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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
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Training Agenda: Refrigeration &
Air Conditioning
Introduction
Type of refrigeration
Types Of Air Conditioner
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Types of Refrigeration
• Vapour Compression
Refrigeration (VCR): uses
mechanical energy
• Vapour Absorption Refrigeration
(VAR): uses thermal energy
Refrigeration systems
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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
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Type of Refrigeration
Vapour Compression Refrigeration
Two advantages
• Lot of heat can be removed (lot of
thermal energy to change liquid to
vapour)
• Heat transfer rate remains high
(temperature of working fluid much
lower than what is being cooled)
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Type of Refrigeration
Vapour Compression Refrigeration
Refrigeration cycle
Condenser
Evaporator
High
Pressure
Side
Low
Pressure
Side
CompressorExpansion
Device
12
3
4
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Type of Refrigeration
Vapour Compression Refrigeration
Refrigeration cycle
Low pressure liquid
refrigerant in evaporator
absorbs heat and changes
to a gas
Condenser
Evaporator
High
Pressure
Side
Low
Pressure
Side
CompressorExpansion
Device
12
3
4
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Type of Refrigeration
Vapour Compression Refrigeration
Refrigeration cycle
The superheated vapour
enters the compressor
where its pressure is
raised
Condenser
Evaporator
High
Pressure
Side
Low
Pressure
Side
CompressorExpansion
Device
12
3
4
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Type of Refrigeration
Vapour Compression Refrigeration
Refrigeration cycle
The high pressure
superheated gas is cooled
in several stages in the
condenser
Condenser
Evaporator
High
Pressure
Side
Low
Pressure
Side
CompressorExpansion
Device
12
3
4
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Type of Refrigeration
Vapour Compression Refrigeration
Refrigeration cycle
Liquid passes through expansion
device, which reduces its pressure
and controls the flow into the
evaporator
Condenser
Evaporator
High
Pressure
Side
Low
Pressure
Side
CompressorExpansion
Device
12
3
4
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Type of Refrigeration
Vapour Compression Refrigeration
Type of refrigerant
• Refrigerant determined by the
required cooling temperature
• Chlorinated fluorocarbons (CFCs) or
freons: R-11, R-12, R-21, R-22 and R-
502
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Type of Refrigeration
Vapour Compression Refrigeration
Choice of compressor, design of
condenser, evaporator determined by
• Refrigerant
• Required cooling
• Load
• Ease of maintenance
• Physical space requirements
• Availability of utilities (water, power)
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Type of Refrigeration
Vapour Absorption Refrigeration
Condenser Generator
Evaporator
AbsorberCold
Side
Hot
Side
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Type of Refrigeration
Vapour Absorption Refrigeration
Evaporator
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Type of Refrigeration
Vapour Absorption Refrigeration
Absorber
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Type of Refrigeration
Vapour Absorption Refrigeration
High pressure generator
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Type of Refrigeration
Vapour Absorption Refrigeration
Condenser
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Training Agenda: Refrigeration &
Air Conditioning
Introduction
Type of refrigeration
Type Of Air Conditioner
Types Of Air Conditioner
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• An air conditioning system is an assembly of different part of the
system used produce a specified condition of air within a require space or building.
• The basic elements of air conditioning system:--
• Fans : For circulation of air
• Filters : For cleaning air
• Heating Elements : Heating of air(It may be electric heater , steam , hot water.
• Control System : It regulates automatically the amount of cooling or heating.
• Grill : It adjust the direction of the conditioned air to the room.
• Tray : It collects condensed water.
• Refrigerating Plant : provide cooling . It consist of compressor/generator and absorber,eveporator,condensor,expansion device(capallary tube).
Air Conditioning System
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Types Of Air Conditioner
• Window Air Conditioner
• Split Air Conditioners
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Types Of Air Conditioner
Window Air Conditioner
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Types Of Air Conditioner
Window Air Conditioner� Working:--The air circulation system of the window air conditioner comprises of
the following parts (please refer fig 4 & 5).
� 1) Blower:This is the small blower that is fitted behind the evaporator or cooling coil inside the assembly of the window air conditioner system. The blower sucks the air from the room which first passes over the air filter and gets filtered. The air then passes over the cooling coil and gets chilled. The blower then blows this filtered and
chilled air, which passes through the supply air compartment inside the window air conditioner assembly. This air is then delivered into the room from the supply air grill of the front panel.
� 2) Propeller fan or the condenser fan: The condenser fan is the forced draft type of propeller fan that sucks the atmospheric air and blows it over the condenser.
The hot refrigerant inside the condenser gives up the heat to the atmospheric air and its temperature reduces.
� 3) Fan motor:The motor inside the window air conditioner assembly is located between the condenser and the evaporator coil. It has double shaft on one side of which the blower is fitted and on the other side the condenser fan is fitted. This
makes the whole assembly of the blower, the condenser fan and the motor highly compact.
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Types Of Air Conditioner
Split Air Conditioner
Split Air Conditioner� The Split Air Conditioner divided in two parts:--
� (1)First part:-Include the evaporator,filter,evaporator fan and grill. They placed inside the room.
� (2)Second part:-Include Condensor ,fan,compressor.This placed out side the room.diameter tubes.therefore,small hole rquired in wall of installation of split air condition.The split air conditioning units are available in capacity range of 1 to 3 tons.
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Training Session on Energy
Equipment
Refrigeration & Air
Conditioning Systems
THANK YOU
FOR YOUR ATTENTION
�