Energy Conservation And Waste Heat Recovery

By Prof. Prasanta Kumar Das, Prof. A Bhattacharya   |   IIT Kharagpur
Learners enrolled: 1046
Estimates from analyses and audits from various industries suggest that 20 to 50% of industrial energy input is lost as waste heat. This waste heat can be in the form of hot exhaust gases, water/fluid streams (from condensers in power plants) or heat lost from hot equipment and surfaces. As the world strives for higher energy efficiencies, it is imperative that along with better equipment we focus on recovering the energy stored in this “waste heat” and utilize it for useful purposes.The proposed course introduces us to various methods of Waste Heat Recovery that has been employed by the industry to harness the energy stored in waste heat and use it for generation of additional electric power.

INTENDED AUDIENCE : Energy Science and Engineering,Mechanical Engineering,
                                                        Electrical Engineering students

PRE-REQUISITES : Basic Thermodynamics

INDUSTRY SUPPORT  : BHEL,NTPC,CESC,WBSEB,DVC and other power companies,
Course Status : Completed
Course Type : Elective
Duration : 12 weeks
Category :
  • Metallurgy and Material science & Mining Engineering
  • Energy and Environment
  • Energy Systems
Credit Points : 3
Level : Undergraduate/Postgraduate
Start Date : 25 Jul 2022
End Date : 14 Oct 2022
Enrollment Ends : 08 Aug 2022
Exam Date : 29 Oct 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 : Introduction to Waste Heat, Importance of Waste Heat Recovery, Review of
                        Thermodynamics – Introduction to First and Second Laws
Week 2 : Review of Thermodynamics – Entropy, Entropy Generation, First and 
                        Second Law efficiency
Week 3 : Power Plant Cycles - Energy Cascading, Rankine Cycle, modification
                        of Rankine cycle, examples
Week 4 : Gas Turbine Cycle, Combined Cycle, Combined Gas Turbine-Steam
                        Turbine Power Plant, Heat Recovery Steam Generators
Week 5 : Thermodynamic cycles for low temperature application, Cogenerations,
                         Introduction to Heat Exchangers, Analysis – LMTD and ε-NTU method
Week 6 : Analysis of Heat Exchanger – continued, Problem solving, Special Heat
                        Exchangers for Waste Heat Recovery, Synthesis of Heat Exchanger
Week 7 : Heat pipes & Vapor Chambers, Direct conversion technologies –
                        Thermoelectric Generators. 
Week 8 : Direct conversion technologies – Thermoelectric Generators (contd.),
                        Thermoionic conversion, Thermo-PV, MHD 
Week 9 : Heat Pump; Heat Recovery from Incinerators, Energy Storage – Introduction.
Week 10 : Energy Storage Techniques – Pumped hydro, Compressed Air, Flywheel,
                        Superconducting Magnetic storage
Week 11 : Energy Storage Techniques – Thermal storage (Sensible & Latent), Battery,
                        Chemical Energy Storage, Fuel cells.
Week 12 : Energy  Economics

Books and references


Instructor bio

Prof. Prasanta Kumar Das

IIT Kharagpur
Prof. Prasanta Kumar Das is a Professor of Mechanical Engineering and presently the Dean Post Graduate Studies and Research at IIT Kharagpur. He possesses a vast experience in teaching and research. His research interests lie in the broad area of thermal engineering with a special emphasis on two phase flow. Apart from teaching many fundamental subjects he offered applied courses like Power Plant Engineering, Thermal System Design, Waste Heat Recovery etc. He has also conducted tailor-made courses for industries. He contributed actively in sponsored research and offered consultancy to different Government and private industries. He contributed more than 190 publications in international journals, a vast number of publications in national and international conferences and 10 patents. He has supervised more than 20 scholars for their doctoral degree. He is fellows of Indian National Academy of Engineering and National Academy of Sciences India.

Prof. A Bhattacharya

Prof. Anandaroop Bhattacharya is an Associate Professor of Mechanical Engineering at IIT Kharagpur. His research interests lie in the areas of electronics cooling, transport in porous media and gas turbine heat transfer. Prior to joining IIT, Anandaroop spent 12 years in the industry in USA and India working at Intel, General Motors and General Electric Research Centers.

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: 29 October 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 8 assignments out of the total 12 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 Kharagpur. 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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