By:- DeVesH GaHLoTFinal Year Mechanical 2011 BatchGuided by:-Mr. Ranjeet Singh RathoreSEMINAR On :-
Reduces operational costs of facilities.Reduces dependency on fossil energy supplyand/or electricity.Contributes to a healthy environment by coolingwithout the use of toxic gases.Use of renewable energy contributes to thereduction of CO2 emissions.
The reduction of CO2 emissionswas agreed at Kyoto and adoptedby the EU 50% of the green houseeffect is caused by burning offossil fuels (CO2) and 22% by“CFCs & HFC” gases used inconventional cooling A reductioncan only be achieved if:-=>Renewable energy systems areused=>Cooling systems are usedwhich do not use toxic gases(absorption cooling)Gasses Responsible for the GreenHouse EffectN2O5%Methan13% CO250%H2O10%CFC&HFC*22%CO2 CFC&HFC* Methan H2O N2O
..…is similar to a vapour compression cycle in thatit relies on 3 basic principals:-When liquid is heated it vaporizes (boils) andwhen gas is cooled it condenses.Lowering the pressure of a liquid reduces itsboiling point.Heat flows from warmer to cooler mediums.
Instead of mechanically compressing a gas, theabsorption cooling relies on a thermo-chemicalcompressorTwo different fluids are used that dissolve easily inone another;water under a vacuum as refrigerantammonia or LiBr* as an absorbentThe refrigerant (water) can change from liquid tovapour state easily and is circulated through thesystem driven by the heat of the solar plant >80degrees
The ammonia used in the closed cooling system issafe, odourless and non-toxic.Ammonia carries no risk to the ozone layer.The hot water heated by the sun used as the primaryenergy source carries no risk to the environment.Should a support energizer be required, waste productcombustion can be used as well as any conventionalenergy source such as gas, oil or electricity.
1. Solar Energy Heated Activated Carbon Bed Up to 180C2. Tap Water Preheating using Condenser Heat 36 C3. Hot Water heating using Hot Module Heat Average 50 C4. Zero Operating Cost5. Environment Friendly
1. Refrigeration Capacity, Qe 160 W2. Evaporator Temperature, Te -10 C3. Condenser Water Inlet Temperature, Tcw.i28 28 C4. Concentration Ration, CR 2.15. Solar Irradiation, It 750 W/m 26. Temperature at Generator Outlet, Tg 180 C7. Temperature at Absorber Outlet, Ta 52 C
Suitable absorbent pairs. Optimum cycle with respect to operatingconditions. Enhancing mass and heat transfer Reducing cycle time.