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I.F.T.M. UNIVERSITY, MORADABADSTUDY & EVALUATION SCHEMEDiploma in Mechanical EngineeringEffective from Session 2012-13DME – 501: Refrigeration L T P 3 1 0UNIT 1. REFRIGERATION: Its meaning and application, Unit of refrigeration, various methods of refrigeration.ABSORPTION REFERIGERATION: Basic system, Ammonia system, improved absorption system, Electrolux refrigerator. Simple problems onbasic and improved system.UNIT 2. VAPOUR COMPRESSION SYSTEM: Simple saturated vapor compression cycle, Standard vapor compression cycle, Study of P-h chartand T-S chart, Numerical analysis of vapor compression cycle with P-h and T-S chart, Wet and dry compression, Factor effects the COP ofsystem, Departure of actual vapor compression cycle from Theoretical cycle of vapor compression, By passing of evaporator, Flash chamber,Accumulator, Pre cooler and Sub cooler, System modification by multi compression and expression, System modification by compoundcompression with inter cooling, Dual and multi effect compression, Multi load system of refrigeration.AIR CYCLE REFERIGERATION: Ideal air cycle, boot strap system, application. Revered carnot cycle, Bell coleman cycle. Simple numericalproblems.UNIT 3. COMPRESSORS: Introduction types and classification of compressors.(a) RECIPROCATING COMPRESSORS: Construction and arrangement of cylinders, types and construction of piston, Suction and dischargevalve (types and construction), Poppet valves, ring plate valves, flexing valves, valve location, Bore and stroke relation of a compressor.Construction of cranks, connecting rod, crank shaft seal and gaskets, lubricants, their properties, Lubrication recommendations (Small systems,industrial refrigeration, miscellaneous equipment) methods of lubrication, Liquid refrigerant in compressor crank case. Method of reducing oilfoaming at the compressor start.(b) ROTARY COMPRESSORS: Construction and working, cylinder construction and fitting rotar construction, blade construction, crank shaftconstruction, valve construction, crank shaft seal and gaskets. Lubrication of rotary compressors.(c) CENTRIFUGAL COMPRESSORS: Construction and working of compressor, sealed unit rufflers and their advantages, hermatic rotarycompressors, Regulation of compressor capacity, Starting of compressor, shutting down of a compressor.UNIT 4. CONDENSORS:Definition, type of condensers, air cooled, water cooled and evaporator type. Air cooled condensers- Natural convection, Mechanically cooledfinned tube, Plate type, Wire mesh, induced and forced type, Chesis mounted and remote type, air quantity and velocity for an air cooledcondenser and rating and selection of air cooled condensers. Water cooled condensers, Evaporative condensers.UNIT 5. EVAPORATORS AND COOLERS: Definition, design, over all heat transfer co-efficient, L.M.T.D., Evaporator T.D., Effect of evaporatorT.D. on space humidity, other factors of evaporator selection. Types of evaporators, Flooded and dry expansion evaporators. Classificationaccording to type of construction, Bare tube, Plate surface and finned, Natural convection evaporators. Rating and selection of natural convectionevaporators. Forced Convection evaporators rating and selection of unit coolers, liquid chilling evaporators (Chillers), double pipe coolers,advantage, disadvantage, application.Books:1. Refrigeration and Air conditioning, by Manohar Prasad, New Age International (P) Ltd.Pub.2. Refrigeration and Air conditioning by C.P Arora.3. Refrigeration and Air conditioning by Arora & Domkundwar.4. Refrigeration and Air conditioning by stoecker & Jones.5. Refrigeration and Air conditioning by Roy J. Dossat.