ME340A: Introduction to Refrigeration and Air Conditioning


Welcome to ME340A


Rudolf Clausius: Heat can never pass from a colder to a warmer body without some other change, connected therewith, occurring at the same time


Lord Kelvin: It is impossible, by means of inanimate material agency, to derive mechanical effect from any portion of matter by cooling it below the temperature of the coldest of the surrounding objects.


Course File

Lecture Date Download Topics covered
Lecture #1 29.07.2019 Lecture Notes #1

Course outline, semester plan, grading policy, books, introduction to Refrigeration and HVAC systems, Industrial scope, Examples

Lecture #2 01.08.2019 Lecture Notes #2

Basic thermodynamics, Units and conversion, Conservation laws, Temperature, Pressure, Enthalpy, Intrinsic and extrinsic properties

Lecture #3 08.08.2019 -

Steady flow processes, First law applied to Nozzles, diffusers, heat exchangers, turbines, compressors, Examples in RAC

Lecture #4 09.08.2019 Lecture Notes #3

Basic elements of a vapor-compression refrigeration system, Phase-change processes, PVT representation, Thermodynamic property tables, Charts

Holiday due to Id (12/08/19) and
Independence day (15/08/2019)
Lecture #5 16.08.2019 Lecture Notes #4 Phase-change processes, Representation, Refrigeration effect, COP, Refrigeration and Heat Pump operation
Lecture #6 19.08.2019 Practice Problem Set #1

Supplementary Questions
Carnot cycle, Ideal VCR cycle, Real;/Practical VCR cycle, Pressure drops, sub-cooling and superheating, Household refrigerator, Heat Pump System
Lecture #7 22.08.2019 Lecture Notes #5 Modes of heat transfer, Conduction, Insulation, Heat Convection, Internal and external flows, Boundary layers
Lecture #8 23.08.2019 - Assignment #1 Problem solving tutorial session
Lecture #9 26.08.2019 - Estimation of transfer coefficients, Newtons law of cooling, Laminar and turbulent flows, Heat transfer coefficient
Lecture #10 29.08.2019 - Phase-change heat transfer, Boiling/Condensation, Discussion on practical design considerations
Lecture #11 30.08.2019   Quiz #1 conducted
Lecture #12 02.09.2019 Lecture Notes #6 Type of heat exchangers, Overall heat transfer coefficient in heat exchangers,  fouling resistance, estimation of fouling, Examples: Scaling and rating problems
Lecture #13 05.09.2019 Lecture Notes #7 Introduction to heat exchanger analysis, LMTD method, Arithmatic mean, Simple geometries and complex designs, Correction factor
Lecture #14 06.09.2019 Lecture Notes #8 NTU - Effectiveness method, Derivation and characteristics
Work #1
Given on 09.09.2019 To be submitted


Student topics and PPT instructions

Presentation Template (PPT)

Lecture #15 09.09.2019 - Introduction to type of evaporators, Flooded tank, Shell and Tube, Beudelot, Finned tube systems, Defrosting, Type of condensers, Evaporative cooling systems
Lecture #16 12.09.2019   Problems solving class: Overall heat transfer coefficient and LMTD methods
Lecture #17 13.09.2019 Lecture Notes #9 Introduction to compressors (Part 1), types of compressors, reciprocating, centrifugal, scroll, construction and their operation
END OF TERM #1: Mid Semester Exam on Wednesday, September 18, 2019 | L12 | 13:00 hrs
Lecture #18 23.09.2019 Lecture Notes #10 Introduction to two-phase flows, flow boiling and flow condensation, different flow patterns, flow patterns maps, adiabatic/non-adiabatic systems
Lecture #19 26.09.2019 - Various definitions, relation between mass fraction and void fraction, slip ratio; ways of flow acceleration, heating/cooling, flashing, phase- compressibility and area change
Lecture #20 27.09.2019 Lecture Notes #11 Development of 1D basic homogeneous flow model, assumptions, two-phase frictional, acceleration and gravitational components,
Lecture #21 30.09.2019 Lecture Notes #12 Refrigerants, types, thermodynamic properties, ASHRAE nomenclature, classification, new developments, Comparison of refrigerants
Lecture #22 03.10.2019 Lecture Notes #13 Comparison between different refrigerants, Alternate refrigerants, replacement of phased out refrigerants, Environmental impact of refrigerants
Lecture #23 04.10.2019 Lecture Notes #14 Compressor Analysis - Part 1: COP, EER, SEER rating, Ideal and real systems, Volumetric efficiency, Isentropic efficiency, actual cycles, Compressor oil, other sub-systems, Introduction to EES (Solver), Compressor performance simulation
Mid Semester Break from 05.10.2019 to 13.10.2019
Lecture #24 14.10.2019 Lecture Notes #15 Overview of all R/HVAC systems installed in IIT Kanpur (Central AC, Microscope Building, Core Labs, Library, DX-Units, Water coolers, Chilled rooms, Animal House, Computer Centre etc.
Lecture #25 17.10.2019 Lecture Notes #16 Compressor Analysis - Part 2: recent advances in compressor designs, performance data, modelling thermal performance of a compressor, design and selction
Lecture #26 18.10.2019 FIELD VISIT Visit to the Central AC plant, Environmental science building, Air handling units, Maintenance Shop, Chillers, Cooling tower, etc.
Lecture #27 21.10.2019 Lecture Notes #17 Introduction to Psychrometric processes, Saturation and thermodynamics, Vapor pressure, Relative humidity, WBT, DBT, Psychrometric Chart
Lecture #28 24.10.2019 Lecture Notes #18 Air conditioning processes, Heating, Cooling, Humidification and Dehumidification, Isenthalpic saturation, Use of Psychrometric Chart, Human Comfort
Lecture #29 25.10.2019   Problem solving exercise on the use of Psychrometric Chart
Lecture #30 28.10.2019 Lecture Notes #19 Introduction to Radiation heat transfer fundamentals, black body radiation, emissivity, absorptivity, transmisivity, Color, Solar spectrum, Gray and diffused bodies, Radiation and building air conditioning
Lecture #32 31.10.2019 Lecture Notes #20 Vapor Absorption Refrigeration System, thermal compression, NH3-water system, construction,
Lecture #33 01.11.2019   COP of absorption systems, Comparison with VCR, Advantages and limitations
Lecture #34 04.11.2019   Innovative Refrigeration Systems, Cascade, Multi-stage and Multi-purpose systems,
Lecture #35 07.11.2019 Lecture Notes #21 Gas liquefaction, Linde-Hampson cycle, Joule-Thomson Coefficient, Gas refrigeration, Reverse Brayton cycle, COP,
Lecture #36 08.11.2019   Solving problems on innovative refrigeration systems
Lecture #37 14.11.2019 Quiz #2 was conducted during regular class hour

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All rights reserved: Dr. Sameer Khandekar, Department of Mechanical Engineering, IIT Kanpur, Kanpur, 208016 India.