Refrigeration and Air-Conditioning

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Refrigeration and Air conditioning is generally referred as RAC. According to University of Pune syllabus, we study it in third year second semester of Mechanical Engineering. Now, I will discuss details of RAC.

Methods of Refrigeration:

This is somewhat theory part of RAC. It starts from basic evaporation type refrigeration method and covers up basic requirements of the subject. Some of the common terms are COP (Coefficient of Performance of System),  EER, SEER, IPLV, steam jet refrigeration, thermoelectric refrigeration, ultrasound refrigeration, air refrigeration system, carnot cycle, reverse carnot cycle, boot strap system etc.

Vapor Compression System:

This is most common refrigeration technique in the world. It contains most basic 4 processes. This system needs very good refrigerants. So along which VCC (Vapor Compression Cycle) we need to study refrigerants, their properties like classification, ODP (Ozone Depletion Potential), GWP (Global Warming Potential), TEWI (Total Equivalent Warming Impact), recycling methods, merits, demerits. After Vapor compression we study Vapor absorption system and multipressure system.

Psychrometry and Air Conditioning:

It deals with air conditioning. It is similar to that of steam table in Applied Thermodynamics. Again we face some more shortforms like RSHF, GSHF, ERSHF, ADP. All of them are related to air conditioning part of the subject.

Components of RAC Systems and Ducts:

Actually duct is different part. Its kinda easy and have own type of calculations. In components part we get to study compressors, their types, merits and demerits over each other, thermostatic expansion valves, capillaries, charging of refrigerant, maintenence etc.

Its really good subject but I feel it somewhat hard. It is also good for further career. Many people do post graduation in RAC.

Thanks for Reading.