ACTIVE LEARNING PROCESS Prepared By : Dishant Panchal 13BECEG112 Neeshit Kaushik 13BECEG122 Neel...

ACTIVE LEARNING PROCESS

Prepared By :Prepared By :

Dishant Panchal 13BECEG112Neeshit Kaushik 13BECEG122Neel Panchal 13BECEG116

Guided By :Guided By : Prof. Jugal Panchal

Branch: Computer Engineering

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Training Agenda: Refrigeration & Training Agenda: Refrigeration & Air ConditioningAir Conditioning

Introduction

Type of refrigeration

Ref ri gerat ion &

AC

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IntroductionIntroduction

How does it work? Refrigeration and air conditioning is used to cool products or a building environment.

Ref ri gerat ion &

AC

High Temperature Reservoir

Low Temperature Reservoir

R Work Input

Heat Absorbed

Heat Rejected

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Thermal energy moves from left to right through five loops of heat transfer:

How does it work?

Ref ri gerat ion &

AC

(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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• 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

Ref ri gerat ion &

AC

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Introduction


Types Of Air Conditioner

Ref ri gerat ion &

AC

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Types of RefrigerationTypes of Refrigeration

• Vapour Compression Refrigeration (VCR): uses mechanical energy

• Vapour Absorption Refrigeration (VAR): uses thermal energy

Refrigeration systemsRef ri gerat ion &

AC

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Type of RefrigerationType of Refrigeration

Vapour Compression RefrigerationRef ri gerat ion &

AC

• 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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AC

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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AC

Refrigeration cycle

Condenser

Evaporator

High Pressure

Side

Low Pressure

Side

CompressorExpansion Device

1 2

3

4

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Vapour Compression Refrigeration/Refr iger ation &

AC

Refrigeration cycle

Low pressure liquid refrigerant in evaporator absorbs heat and changes to a gas

Condenser

Evaporator

High Pressure

Side

Low Pressure

Side


1 2

3

4

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AC

Refrigeration cycle

The superheated vapour enters the compressor where its pressure is raised

Condenser

Evaporator

High Pressure

Side

Low Pressure

Side


1 2

3

4

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AC

Refrigeration cycle

The high pressure superheated gas is cooled in several stages in the condenser

Condenser

Evaporator

High Pressure

Side

Low Pressure

Side


1 2

3

4

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AC

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


1 2

3

4

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AC

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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AC

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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Vapour Absorption RefrigerationRef ri gerat ion &

AC

Condenser Generator

Evaporator

AbsorberCold Side

Hot Side

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AC

Evaporator

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AC

Absorber

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Vapour Absorption Refrigeration

Ref ri gerat ion &

AC

High pressure generator

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AC

Condenser

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Introduction


Type Of Air Conditioner

Ref ri gerat ion &

AC

Types Of Air ConditionerTypes 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

Ref ri gerat ion &

AC

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Ref ri gerat ion &

AC

• Window Air Conditioner

• Split Air Conditioners

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Window Air Conditioner

Ref ri gerat ion &

AC

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Window Air Conditioner

Ref ri gerat ion &

AC

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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Split Air Conditioner

Ref ri gerat ion &

AC

Split Air ConditionerSplit Air ConditionerThe 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 Training Session on Energy EquipmentEquipment

Refrigeration & Air Refrigeration & Air Conditioning SystemsConditioning Systems

THANK YOUTHANK YOU

FOR YOUR ATTENTIONFOR YOUR ATTENTION

Ref ri gerat ion &

AC

ACTIVE LEARNING PROCESS Prepared By : Dishant Panchal 13BECEG112 Neeshit Kaushik 13BECEG122 Neel...

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