1. By:- DeVesH GaHLoT
Final Year Mechanical 2011 Batch
Guided by:-Mr. Ranjeet Singh Rathore
SEMINAR On :-

2. Reduces operational costs of facilities.
Reduces dependency on fossil energy supply
and/or electricity.
Contributes to a healthy environment by cooling
without the use of toxic gases.
Use of renewable energy contributes to the
reduction of CO2 emissions.

3. The reduction of CO2 emissions
was agreed at Kyoto and adopted
by the EU 50% of the green house
effect is caused by burning of
fossil fuels (CO2) and 22% by
“CFCs & HFC” gases used in
conventional cooling A reduction
can only be achieved if:-
=>Renewable energy systems are
used
=>Cooling systems are used
which do not use toxic gases
(absorption cooling)
Gasses Responsible for the Green
House Effect
N2O
5%
Methan
13% CO2
50%
H2O
10%
CFC&HFC
*
22%
CO2 CFC&HFC* Methan H2O N2O

4. ..…is similar to a vapour compression cycle in that
it relies on 3 basic principals:-
When liquid is heated it vaporizes (boils) and
when gas is cooled it condenses.
Lowering the pressure of a liquid reduces its
boiling point.
Heat flows from warmer to cooler mediums.

5. Instead of mechanically compressing a gas, the
absorption cooling relies on a thermo-chemical
compressor
Two different fluids are used that dissolve easily in
one another;
water under a vacuum as refrigerant
ammonia or LiBr* as an absorbent
The refrigerant (water) can change from liquid to
vapour state easily and is circulated through the
system driven by the heat of the solar plant >80
degrees

6. The ammonia used in the closed cooling system is
safe, odourless and non-toxic.
Ammonia carries no risk to the ozone layer.
The hot water heated by the sun used as the primary
energy source carries no risk to the environment.
Should a support energizer be required, waste product
combustion can be used as well as any conventional
energy source such as gas, oil or electricity.

7. 1) Solar collector
2) Separator
3) Rectifier
4) Condenser
5) Evaporator
6) Heat Exchanger
7) Absorber/generator module/s

9. 1. Solar Energy Heated Activated Carbon Bed Up to 180
C
2. Tap Water Preheating using Condenser Heat 36 C
3. Hot Water heating using Hot Module Heat Average 50 C
4. Zero Operating Cost
5. Environment Friendly

10. 1. Refrigeration Capacity, Qe 160 W
2. Evaporator Temperature, Te -10 C
3. Condenser Water Inlet Temperature, Tcw.i28 28 C
4. Concentration Ration, CR 2.1
5. Solar Irradiation, It 750 W/m 2
6. Temperature at Generator Outlet, Tg 180 C
7. Temperature at Absorber Outlet, Ta 52 C

11.  Suitable absorbent pairs.
 Optimum cycle with respect to operating
conditions.
 Enhancing mass and heat transfer
 Reducing cycle time.