DESIGN AND FABRICATION OF SOLAR COOLING SYSTEM

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DESIGN AND FABRICATION OF SOLAR COOLING
SYSTEM
BATCH NO 9
TEAM MEMBERS S.Gautham 07ME13, G.Mohankumar
07ME27, S.Sakthivel 08MEL508, M.Vishnuja
yanthan08MEL509.
GUIDE BY A.BALAJI M.E., Assistant Professor (Sr.
Grade), Department of Mechanical Eng.,
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Objective

• The main aim of the project is a try to generate
  a cooling effect by using solar energy.
• To design and construct a compressor free cooling
  system.
• To use environmental friendly refrigerant for
  reduce the pollution (R134a).
• To reduce the usage of electricity for cooling
  purpose.

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Introduction

• REFRIGERATION

Refrigeration is a process by which the
temperature of a given space or substance is
lowered below than the atmosphere.

• AIR CONDITION

Air condition is a process Of controlling the
temperature, quantity, humidity quality of a air
for the required space.
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Conventional cooling system

• 1)Vapour Compression cooling System
• 2)Vapour Absorption cooling System

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Comfort cooling condition

1. Climate and seasonal differences
2. Clothing
3. Age and sex
4. Duration of stay

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Solar collector

• It can increases the pressure and temperature of
  the vapour refrigerant.
• It can acts generator cum absorber.

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Condenser
TYPE Air cooled condenser A Condenser is a
equipment built for efficient heat transfer from
one medium to another
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Evaporator

• Any of many devices in which liquid is changed to
  the vapor state by the addition of heat
• In refrigeration system element where evaporation
  proceeds at low pressure and consequent low
  temperature.

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Non Return Valve

• Function of Check Valve is to prevent the reverse
  flow of fluid in case of failure or sudden
  shut-down of Piping System.

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Refrigerant

• R134a Tetrafluoroethane
• Refrigerant is a heat carrying medium which
  absorb the heat from low temperature space and
  reject the heat to high temperature space.

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Properties of R134a
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WORKING PROCEDURE
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Experimental Results
Date 24.03.2011 PLACE THERMAL
ENGINEERING LAB
Collector Temp. (c) Suction Pressure psi Dis. Pressure psi Conditioned Air temp c Time pm Atm. Temp c
68 118 118 35 12.10 35
70 120 128 34 12.15 35
76 127 138 34 12.20 35
84 131 162 33 12.40 36
92 128 166 31 1.05 36
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TESTING RESULTS OF R134a - TetraFlouroEthane
Temperature Table (20C - 56C)
Temp C Pressure kPa
20 571.7
24 645.8
26 685.4
28 726.9
30 770.2
32 815.4
34 862.6
36 911.9
38 963.2
40 1016.6
42 1072.2
44 1130.1
48 1252.9
52 1385.4
56 1528.2
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COMPONENT TYPE
Solar collector Flat plate
Air conditioner Indoor unit
Refrigerant R134a
Condenser Air cooled
Evaporator Air cooled
Gauges Pressure vacuum gauges
Expansion Valve Capillary tube
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Specification
COMPONENTS SPECIFICATIONS
Aluminium box 3X2 ft
Copper tube 20 ft
Blower motor 240V, 2A, 50Hz
Air Conditioner 1 ton
Glass 2X3 ft, 4mm(thickness)
Hoses (Suction Discharge) 2500 psi (max.)
Refrigerant 500 Gms
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Advantages

• Environmental based
• Pollution free eco friendly
• Reduce the usage of conventional energy and
  as good alternatives.
• CFC emission is reduced.

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Contd..

• Technical based
• Refrigeration with no compressor.
• R-134a is used as refrigerant which has low
  emission of CFC.
• It does not depend upon the electrical energy.

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Future Scopes

• The electric energy to the condenser fan and
  blower to be supplied by solar photovoltaic cell.
• During night time the heat can be supplied by
  using the heating coil.
• By increasing the area of the solar collector
  performance can be improved.

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(Contd.)

• By changing the refrigerant human comfort can be
  increased.
• By replacing the normal valve to solenoid valve,
  the system can be automated.

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Conclusion

• The system works satisfactorily and reduces the
  ambient temperature considerably by 6 to 8oc. The
  results obtained from the system are tabulated.
• In future we hope that our whole world is purely
  depend on renewable energy so our project is very
  much useful for pollution free environment.
• By taking the further developments it may
  possible to produce cost free cooling.

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THANK U
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Photocopy
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