Course Title:             Refrigeration and Air Conditioning

Course Code:            MT-324

Course Duration:      1 Semester

Credit Hours:            2  

 Teacher:                    Engr. Muhammad Ashiq
                                     Department of Mechanical Engineering 

                                     Phone/email:[email protected]

Objectives:

The objective of the course is to familiarize the students with the refrigeration and air-conditioning cycles and its construction and working.

Course Outline:

 Introduction to refrigeration, History of refrigeration, thermodynamic system, path and point functions, thermodynamic process, cycle, heat, work , State the four fundamental laws of thermodynamics , Apply first law of thermodynamics to closed and open systems and develop relevant equations , internal energy and enthalpy Discuss the importance of second law of thermodynamics and state Carnot theorems. Define and distinguish the differences between heat engine, refrigerator and heat pump , Obtain expressions for Carnot efficiency of heat engine, refrigerator and heat pump , State Claudius inequality and introduce the property ‘entropy’. Refrigeration Machines and reversed Carnot cycle Refrigeration machine, The Carnot cycle, Vapor as refrigerant in Reversed Carnot cycle, Gas as refrigerant in Reversed Carnot cycle, Limitation of Reversed Carnot cycle, COP. Vapor compression System Modification in Reversed Carnot cycle with Vapor as a refrigerant, Vapor compression cycle, Wet and Dry compression, Actual Vapor compression cycle, Pressure-Enthalpy diagram, Simple saturated cycle on P-H diagram, Co-Efficient of performance and Energy Efficiency Ratio,(EER),Heat of compression, Work of compression and the heat of rejection. Vapor Absorption System Simple Vapor Absorption system, Maximum Coefficient of performance of a heat operated Refrigeration machine, Common RefrigerationAbsorption systems, water and lithium bromide absorption system, Single effect and double effect absorption cycle. Psychrometry Psychrometry, Properties of Air, water vapor in the air, Relationship between pressure of air and pressure of water vapor, Humidity, Temperature, Dew point and Wet bulb Depression, Enthalpy of Moist air, Adiabatic saturation of air, Relationship between humidity ratio and dry bulb and wet bulb temperature, specific volume of moist air, Specific heat of moist air, Psychometric chart, Sensible heating and cooling, Heating with humidification, cooling with dehumidification, By Pass factor, Sensible Heat factor. Refrigerant Introduction of refrigerant, Development of refrigerant .Classification of refrigerant, Designation of refrigerant, Requirement of selection of refrigerant, Safety procedure, common refrigerant. Application of Refrigeration and Air condition Cold storage, Ice Making, Window type AC, Split AC, Package Type, Cooling Towers, Air washers, Chiller

Components of Assessment

            Assessment during the semester      = 20 marks

• Assignments / Class Participation / Attendance        =10     
• Quizzes / Semester Project                             = 10

            Mid Term /Term Paper                   = 30 marks

            End Term Examination                    = 50 marks

            Total                                                   = 100 marks

Semester Start Date:  13-01-2020

Class Timings:                      

Tuesday (Section B) :  02:00PM - 03:40PM

Thursday (Section A): 02:00PM - 03:40PM