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42 REFRIGERATION AND AIR CONDITIONING, LT P, 5 1 2, RATIONALE, , The diploma holders in Mechanical Engineering are responsible for supervising and maintenance of RAC, system. For this purpose, the knowledge and skill covering basic principles of refrigeration and air, conditioning is required to be imparted to the students. Moreover, RAC industry is expanding and, employment opportunities in this field are good., , LEARNING OUTCOMES, After undergoing this course, the students will be able to:, , e explain the working and construction features of refrigeration and air conditioning, systems, , ¢ draw and interpret various refrigeration cycles., , ¢ make basic calculation of psychometric properties and processes., , ¢ calculate heating and cooling load requirements of a room., , ¢ explain latest developments in the field of refrigeration and air conditioning., , ¢ calculate the properties ofair by using psychometric chart., , * detect faults in an air-conditioner/refrigerator., , © carry out charging of air conditioner., , DETAILED CONTENTS, , REFRIGERATION, , 1. Fundamentals of Refrigeration (07 Periods), Introduction to refrigeration, air conditioning, necessity of refrigeration meaning of, refrigerating effect, units of refrigeration, COP, difference between COP and efficiency,, methods of refrigeration, Reversed carnot cycle and its representation on P-V and T-S, diagram. Major application areas of refrigeration and air conditioning., , 2. Vapour Compression System (10 Periods), Introduction, principle, function, parts and necessity of vapour compression system, T- S, and p— h charts, dry, wet and superheated compression. Effect of sub cooling, super, , heating, mass flow rate, entropy, enthalpy, work done, Refrigerating effect and COP., actual vapour compression system, , CORRECTED AND APPROVED BY BOARD OF TECHNICAL EDUCATION,U.P,LUCKNOW IN MEETING HELD ON, 10.07.2019 @RASHMI SONKAR, , , , Page 109, , @ Scanned with Oken Scanner

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3. Refrigerants (07 Periods), , Functions, classification of refrigerants, Nomenclature of refrigerant, Desirable properties, of refrigerant, selection of refrigerant, , 4. Air Refrigeration System (08 Periods), , Introduction, advantages and disadvantages of air-refrigeration system over vapour, compression system, bell — Collemann cycle, Boot strap system, calculation of mass flow, rate, work done and COP, , Sy Vapour Absorption System (08 Periods), , Introduction, principle and working of simple absorption system and domestic electrolux, refrigeration systems. Solar power refrigeration system, advantages and disadvantages of, , solar power refrigeration system over vapour compression system.,, 6. Refrigeration Equipment (08 Periods), , 6.1 Compressors- Function, various types of compressors, , 62 Condensers - Function, various types of condensers, , 63 Evaporators- Function, types of evaporators, , 64 Expansion Valves - Function, various types such as capillary tube, thermostatic, expansion valve, low side and high side float valves, application of various, expansion valves, , 65. Safety Devices-Thermostat, overload protector LP, HP cut out switch., , AIR CONDITIONING, , 7. Psychrometry (08 Periods), , Definition, importance, specific humidity, relative humidity, degree of saturation, DBT,, WBT, DPT, sensible heat, latent heat, Total enthalpy of air., , 8. Applied Psychrometry and Heat Load Estimation. (08 Periods), , Psychrometric chart, sensible heating and cooling, Adiabatic cooling, Humidification and, dehumidification, cooling and humidification, cooling and dehumidification, heating and, humidification, heating and dehumidefication, by pass factor, room sensible heat factor,, effective room sensible heat factor, grand sensible heat factor, ADP, room DPT. Heating, and cooling load calculation., , CORRECTED AND APPROVED BY BOARD OF TECHNICAL EDUCATION,U.P,LUCKNOW IN MEETING HELD ON, 10.07.2019 @RASHMI SONKAR, , , , Page 110, , G Scanned with Oken Scanner

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Heating and humidification, cooling and dehumidification, window air-conditioning, split, type air-conditioning, car air-conditioning, central air-conditioning., , Latest development in refrigeration and air conditioning:- (06 Periods), , Inverter technology, auto-de frosting, blast cooling, star rating., , LIST OF PRACTICALS, , Pig, , eer ams, , 10., Il., , Demonstration of various refrigeration tools and equipment., , Practice in cutting, bending, flaring, swaging and brazing of tubes., , Study of thermostatic switch, LP/HP cut out overload protector filters, strainers and filter, driers., , Identify various parts of a refrigerator and window air conditioner., , To find COP of Refrigeration system, , To measure air flow using anemometer., , Charging ofa refrigerator/ air conditioner., , To detect faults in a refrigerator/ air conditioner, , Visit to an ice plant or cold storage plant. or central air conditioning plant., Demonstration and working of window type air-conditioner., Demonstration and working of split type air-conditioner., , MEANS OF ASSEESSMENT, , Assignments and quiz/class tests, Mid-term and end-term written tests, Actual Practical Performance, Report Writing, , Viva-voce, , INSTRUCTIONAL STRATEGY, , wv, , Teaches should take the students to industry and explain the details of refrigeration and, air-conditioning systems and their components., , While imparting instructions, focus should be on conceptual understanding., , Training slides of “Carrier Fundamentals of Refrigeration Air Conditioning” to be shown, to students., , RECOMMENDED BOOKS, , 8., 9., , Refrigeration and Air Conditioning by Domkundwar; Dhanpat Rai and Sons, Delhi., Refrigeration and Air Conditioning by CP Arora; Tata McGraw Hill, New Delhi., , CORRECTED AND APPROVED BY BOARD OF TECHNICAL EDUCATION,U.P,LUCKNOW IN MEETING HELD ON, 10.07.2019 @RASHMI SONKAR, , , , Page 111, , (@ 2 Scanned with Oken Scanner