Vapour Compression Refrigeration Dr. M. Zahurul Haq Professor Department of Mechanical Engineering Bangladesh University of Engineering & Technology (BUET) Dhaka-1000, Bangladesh [email protected]http://teacher.buet.ac.bd/zahurul/ ME 415: Refrigeration & Building Mechanical Systems c Dr. M. Zahurul Haq (BUET) Intro to VC Refrigeration ME 415 (2011) 1/8 Working Principle of Vapour Compression Refrigeration Evaporation & Condensation of Refrigerant, R134a -50 -40 -30 -20 -10 0 10 20 30 40 50 0 200 400 600 800 1000 1200 1400 P sat (kPa) T sat ( o C) e492 e480 Refrigerant boils & condenses at different temperatures at different pressures. During boiling/condensation it absorbs/rejects latent heat. c Dr. M. Zahurul Haq (BUET) Intro to VC Refrigeration ME 415 (2011) 2/8 Working Principle of Vapour Compression Refrigeration e481 e482 c Dr. M. Zahurul Haq (BUET) Intro to VC Refrigeration ME 415 (2011) 3/8 Working Principle of Vapour Compression Refrigeration e483 Float Valve to maintain liquid level e484 TXV to regulate liquid flow c Dr. M. Zahurul Haq (BUET) Intro to VC Refrigeration ME 415 (2011) 4/8
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Vapour Compression Refrigeration
Dr. M. Zahurul Haq
Professor
Department of Mechanical Engineering
Bangladesh University of Engineering & Technology (BUET)