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) |
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| 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 |
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Home Work #1 |
Given on 09.09.2019 |
To be submitted 14.10.2019 |
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| 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 | |
All rights reserved: Dr. Sameer Khandekar, Department of Mechanical
Engineering, IIT Kanpur, Kanpur, 208016 India.