Transcription of UNIT 4 REFRIGERANTS - IGNOU
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UNIT 4 REFRIGERANTS - IGNOU
unit 4 REFRIGERANTS Structure Introduction Objectives Primary and Secondary REFRIGERANTS Classification of REFRIGERANTS Designation of REFRIGERANTS Desirable Properties of REFRIGERANTS Thermodynamic Properties Chemical Properties Physical Properties Safety Criteria Economic Criteria Common REFRIGERANTS Ozone Depletion Potential and Global Warming Potential Secondary REFRIGERANTS Illustrative Problems Summary Answers to SAQs INTRODUCTION The working agent in a refrigerating system that absorbs carries or releases heat from the place to be cooled or refrigerated can be termed as a refrigerant .
55 Halocarbon compounds Refrigerants These are obtained by replacing one or more hydrogen atoms in ethane or methane with halogens. Azeotropes These are the mixtures of two or more refrigerants and behave as a
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