Question

Question-2 (16%): a) Write some methods to reduce ozone depletion and global warming caused by refrigeration applications. b) Explain how using absorption refrigeration system can reduce global warming. c) Give two reasons for the popularity of ammonia as a refrigerant despite the fact that it is somewhat flammable and toxic. d) Arrange the following refrigerants according to their ODP from high to low: ammonia (N2H3), R134a (C2H2 F14), R22 (CH CI Fl2), R12 (CCl2 Fl2). e) Explain effect of using absorption refrigeration system on global warming and ozone depletion. f) Explain effect of using multistage pressure cycle with flash intercooler on the Global warming g) Explain effect of using water cooled condenser on the Global warming h) Explain some compressor capacity control methods which reduced GW.

Answer 1

Question 2 ant , @ Any Methods to reduce ozone depletion and global Warming coused by mean refoigevant applications - use of air conditioning and refrigerant equipment 3 that does not cese Hits as refrigerant © By Megular inspection and maintenance of our conditioning and reefrigerantin appliances. for existing air conditioning and refrigerantion appliances that HeFCs a CFCs, the refrigerant should be recovereed or recycled © Absorption refrigeration 34s-em reduce global warming by , co). absorption refrigeration system cises waste energy (solar energy) as a heat source. which is green energy It uses two cole liquid to one refrigerant and one coolant & which act as absorbant), which is water therefore minimizing their impact on the ozone layer and global warming FC ScaIt offers heat recovery from virtually CamScannQny system

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