Transcription of Refrigeration and Air conditioning
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Refrigeration and Air conditioning
Introduction to Refrigeration and Air conditioning Refrigerationisaprocessofachievingandmai ntainingalowtemperaturebelowthatofsurrou ndingsWhich of the following can be called as a Refrigeration process??a)Coolingofhotingotfrom10000 Ctoroomtempb)Coolingofapotofwaterbymixin gitwithalargeblockoficec)Coolingofhumanb eingsusingaceilingfand)Coolingofhotwater bymixingitwithtapwatere)Coolingofwaterby creatingvacuumoveritf)Coolingofahotcupof coffeebyleavingitonatableSYLLUBUSMODULE 1 Introduction , Airrefrigerationsystems-ReversedJoulecyc le,Aircraftrefrigerationsystems, 2 Vortextuberefrigeration-Verylowtemperatu rerefrigerationsystems(conceptonly).Adia baticdemagnetizationofparamagneticsalts. methodsofimprovingCOPofsimplecycle-super heating,undercooling,Liquidsuctionheatex changer, 3 Refrigerantsandtheirproperties-Eco-frien dlyRefrigerants,mixedrefrigerants,select ionofrefrigerantsfordifferentapplication s.
•Cold air at the exit of the turbine flows into a room or cabin and cold HX doesn’texist. •Will take fresh air for next cycle. •In such a case, the low side pressure will be atmospheric. Closed systems •The same gas (air) flows through the cycle. •Low side pressure can be above atmospheric. •These systems are known as denseairsystems.
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