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Indian Institute of Technology, Kharagpur

Energy Conservation and Waste Heat Recovery

Indian Institute of Technology, Kharagpur and NPTEL via Swayam


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 studentsPRE-REQUISITES : Basic ThermodynamicsINDUSTRY SUPPORT : BHEL,NTPC,CESC,WBSEB,DVC and other power companies,GE,Siemens,Alstom



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

Taught by

Prof. Prasanta Kumar Das & Prof.Anandaroop Bhattacharya

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