Subject Syllabus
ME-801 - Refrigeration & Air Conditioning
ME · Semester 8
Course Modules
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Principles and methods of refrigerationFreezingMixture cooling by gas reversible expansion, throttling, evaporationJoule Thomson effect and reverse Carnot cycleUnit of refrigerationCoefficient of performanceVortex tube and thermoelectric refrigerationAdiabatic demagnetizationAir refrigeration cycles: Joule's cycle, Boot-strap cycle, reduced ambient cycle and regenerative cooling cycles
Vapor compression cyclep-h and t-s diagramsDeviations from theoretical cycleSub-cooling and super heatingEffects of condenser and evaporator pressure on COPMulti-pressure system: removal of flash gasMultiple expansion and compression with flash inter coolingLow temperature refrigeration: production of low temperaturesCascade systemDry ice and production of dry iceAir liquefaction system
Vapour absorption system: theoretical and practical systems such as aqua-ammonia, Electrolux and other systemsSteam jet refrigeration: principles and workingSimple cycle of operationDescription and working of simple systemRefrigerants: nomenclature and classificationDesirable propertiesCommon refrigerationComparative studyLeak detection methodsEnvironment friendly refrigerants and refrigerant mixturesBrine and its properties
Calculation of psychrometric properties of air by table and chartsPsychrometric processes: sensible heating and coolingEvaporative coolingCooling and dehumidificationHeating and humidificationMixing of air streamSensible heat factorPrinciple of air conditioningRequirements of comfort air conditioningVentilation standardsInfiltrated air loadFresh air loadHuman comfortEffective temperature and chartHeat production and regulation of human body
Calculation of summer and winter air conditioning loadBypass factor of coilCalculation of supply air rate and its conditionRoom sensible heat factorGrand sensible heat factorEffective sensible heat factorDehumidified air quantityProblems on cooling load calculationAir distribution and ventilation systems