Refrigeration and air-conditioning

By Prof. Ravi Kumar   |   IIT Roorkee
Learners enrolled: 2693
This Course provides a simple understanding of Refrigeration and Air-conditioning fundamentals. Ideally suited to those with a little or no knowledge of the subject. The course consists of different refrigeration cycles and understanding of psychrometry and psychrometric processes used for the purpose of air-conditioning. Further, the comfort air-conditioning and indoor environment health are also addressed in this course.

INTENDED AUDIENCE : UG & PG students of Mechanical & Civil Eng. and Architecture students

Course Status : Completed
Course Type : Core
Duration : 8 weeks
Category :
  • Mechanical Engineering
Credit Points : 2
Level : Undergraduate
Start Date : 25 Jul 2022
End Date : 16 Sep 2022
Enrollment Ends : 08 Aug 2022
Exam Date : 25 Sep 2022 IST

Note: This exam date is subjected to change based on seat availability. You can check final exam date on your hall ticket.

Page Visits

Course layout

Week-1 : Recapitulation of Thermodynamics, Introduction to Refrigeration, Air Refrigeration Cycle, Aircraft Refrigeration Cycles.
Week-2 : Aircraft Refrigeration Cycles,Vapour Compression Cycle,P-h Charts, Actual Vapour Compression Cycle
Week-3 : Actual Vapour Compression Cycle,Compound Compression with Intercooling, Multiple Evaporator and Cascade System, Problem Solving
Week-4 : Refrigerants, Vpour Absorption Systems.
Week-5 : Introduction to Air-conditioning, Properties of Moist Air, Psychrometric Chart, Psychrometric Processes.
Week-6 : Psychrometric Processes, Infiltration Design Conditions, Cooling Load.
Week-7 : Cooling Load, Air Distribution System, Problem Solving, Air-Conditioning Systems
Week-8 : Human Physiology, Thermal Comfort, Indoor Environmental Health, Problem Solving

Books and references

  1. Refrigeration & Air-conditioning, CP Arora, TMG
  2. Refrigeration & Air-conditioning, Manohar Prasad, NAI
  3. Refrigeration & Air-conditioning, Stoecker & Jons, MGH
  4. Principles of Refrigeration, RC Dosset, LPE
  5. ASHRAE Handbook (Fundamentals), ASHRAE

Instructor bio

Prof. Ravi Kumar

IIT Roorkee
Dr. Ravi Kumar is a Professor in the Department of Mechanical & Industrial Engineering, Indian Institute of Technology Roorkee. He has been teaching thermal engineering courses in the Department and is actively involved in the research related with Solar Energy. He is a member of ASME, ASHRAE and IIFIIR.

Course certificate

The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.
The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).
Date and Time of Exams: 25 September 2022 Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.
Registration url: Announcements will be made when the registration form is open for registrations.
The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.
Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.


Average assignment score = 25% of average of best 6 assignments out of the total 8 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Roorkee. It will be e-verifiable at nptel.ac.in/noc.

Only the e-certificate will be made available. Hard copies will not be dispatched.

Once again, thanks for your interest in our online courses and certification. Happy learning.

- NPTEL team

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