MANUFACTURING TECHNOLOGY-IIREFRIGERATION AND AIR-CONDITIONINGUNIT4 SD 2013REFRIGERATION SD 2013REFRIGERATIONRefrigerationisdefnedas theprocessofprovidingand maintainingatemperature wellbelowthatof surrounding atmosphere. SD 2013REFRIGERATOR AND HEAT PUMPS SD 2013TYPES OF REFRIGERATOR1. Ice refrigerator2. Air refrigerator3. Vapour refrigeratorA. Vapourcompression refrigeratorsB. Vapour absorption refrigerators SD 2013APPLICATION OF REFRIGERATION hemicalindustriesforseparatingand li!uif"ing gases and vapors.#anufacturing and storing of ice for cooling water$orcontrollinghumidit"ofairinthe manufactureandheattreatmentof steels%&harmaceutical industries &rinting industries SD 2013REFRIGERANTREFRIGERANTCOMPARISON VAPOUR COMPRESSION REFRIGERATORS SD 2013VAPOUR ABSORPTION REFRIGERATORS VAPOUR ABSORPTION REFRIGERATORS VAPOUR ABSORPTION REFRIGERATORS SD 2013VAPOUR ABSORPTION REFRIGERATORS SD 2013VAPOUR ABSORPTION REFRIGERATORS SD 2013COMPARISON COMPARISON REFRIGERANTS Asubstancewhichisusedto e'tractheatfromthelow temperaturebod"and deliversintothehigh temperaturebod"is(nown as refrigerant. SD 2013DESIRABLE PROPERTIES OF REFRIGERANT)*#IA+ &R,&*R-I*. It should be non/to'ic It should be non/corrosiveIt should be non/0ammableIt should be non/e'plosiveIt should react with lubricating oilIt should react with moisture to form acid SD 2013DESIRABLE PROPERTIES OF REFRIGERANTPHYSICAL AND THERMODYNAMICS PROPERTIES It should have low specifc volumeIt should have low specifc heatIt should have low boiling and free1ing pointIt should have high latent heat of vaporisationIt should have high thermal conductivit" SD 2013TYPES OF REFRIGERANTAmmoniaarbon 2i/o'ide.ulphur 2i/o'ide$reon/11$reon/12$reon/13$reon/21$reon/22 SD 2013TYPES OF REFRIGERANT SD 2013TYPES OF REFRIGERANT SD 2013APPLICATION OF REFRIGERANT SD 201323 SD 2013Type of RefrigerationEvaporative CoolingREFRIGERATION4Adapted from #unters% 25516Cold AirHot AirSprinkling WaterAir in contact with water to cool it close to wet bulb teperature!Advantage" efficient cooling at low cost#isadvantage" air is rich in oistureSPECIFIC HEAT OF WATER & ICE SD 2013SPECIFIC HEAT.pecifc heat is defned as the !uantit" ofheat re!uired to rise or lower the temperature one (g of water through one 7elvin or degree elsius in one second SD 2013SPECIFIC HEAT SD 2013REFRIGERATING EFFECT SD 2013REFRIGERATING EFFECT It is defned as the !uantit" of heat e'tracted from a cold bod" or space to be cooled in a given time. SD 2013REFRIGERATING EFFECT SD 2013It is dented !" #ette$ %N&Unit'()*s+CAPACITY OF A REFRIGERATION UNITOR TON OF REFRIGERATION SDK 2013CAPACITY OF A REFRIGERATION UNIT,ne ton of refrigeration is defned as the !uantit" of heat abstracted to free1e one ton of water in a duration of 28 hours at 59 . SDK 2013CAPACITY OF A REFRIGERATION UNIT SDK 2013He,t,!st$,-ted.$/ 0,te$ ,t 12C t -n3e$t it int i-e,t 12C 45CAPACITY OF A REFRIGERATION UNIT SDK 2013L,tent6e,t.i-e4778 ()*(9CAPACITY OF A REFRIGERATION UNIT $ TON OF REFRIGERATION SD 2013Tn.$e.$i9e$,tin4:;811 ()*6$4;:1 ()*/in 4 7COP? SDK 2013CO-EFFICIENT OF PERFORMANCE >COP?It is defned as the ratio of heat e'tracted in a given time to the wor( input. SDK 2013CO-EFFICIENT OF PERFORMANCE >COP? SD 2013CO-EFFICIENT OF PERFORMANCE >COP? SDK 2013RELATIVE C