This presentation is regarding 'Energy Conservation', presented to our respected teacher Prof. Dr. Moinuddin Ghauri. It is a small scale design of a heat recovery system made on gensets installed in CIIT Lahore Campus. This shows how heat lost to the environment can be saved. Although the quamtum of heat on a 50 kVA genset may not be significant, but it is a demo of bigger installations which, if installed in an industry with its own power generation system, can give huge monetary benefits.

2. Energy Conservation in Gensets
Installed in COMSATS Lahore

3. Group Members
• Kashif Arif SP10-BEC-020
• Muhammad Bin Abbas SP10-BEC-025
• Muhammad Hamza SP10-BEC-027
• Usman Ali SP10-BEC-034
• Raheel Wasim SP10-BEC-038
• Zaheer Mazhar SP10-BEC-052

4. Intro
• Reason of Presentation
– Energy Crisis
– Energy Loss

5. Presentation Overview
• Sankey diagram
• System’s Specifications
• Heat Losses In the System
• Solutions to Heat Losses
• Summary

6. A Sankey Diagram

8. Genset Design Specifications
• Consists of a diesel engine coupled with an
electric generator
• Specifications:
– 6 in line cylinders
– 6000 cc diesel engine
– Engine Speed: 1500 rpm
– Fuel consumption: 22.8 litres/hr

9. Gas Flow Rates
• Radiator cooling air flow: 192 ft3/min
• Combustion air flow: 6 ft3/min
• Exhaust gas air flow: 17.6 ft3/min

10. Exhaust gas temperature: 585 oC

11. Heat Losses (kJ/hr)
• Heat rejected to:
– Exhaust system: 249,000
– Water & lube oil: 251,000
– Radiation to room: 174,000

13. List of All Energy Losses
• Flue gas loss
• Loss to coolant and lubricating oil
• Radiation loss
• Vibration loss
• Sound loss

14. Solutions to Energy Losses
Heat exchanger around the exhaust pipe
Employ an absorption refrigeration system
Install micro turbines for tapping the kinetic
energy of flue gases
Buoyancy of flue gases can also be used

15. Solutions (contd.)
Use the heat of engine body

16. Heat Exchanger Around the Exhaust
Pipe

17. Heat Exchanger Around the Exhaust
Pipe

18. Heat Exchanger Around the Exhaust
Pipe
• Double pipe heat exchanger
• Can be used for making steam from water
• This steam can be subsequently used for
generating electricity using steam turbine
power plant on a small scale.

19. Employ an absorption refrigeration
system
• The relatively low heat content of flue gases
leaving the exhaust pipe can be used for
running a gas absorption refrigeration cycle.

20. Install micro turbines for tapping the
kinetic energy of flue gases
• If micro turbines are installed in the exhaust
pipe, the kinetic energy of flue gases can be
used for running that turbine.
• Buoyancy of flue gases.

21. Heat of Engine Body
• Emits more heat than carried by flue gases
– Employ a Stirling engine

22. Stirling Engine

23. Summary
• Rated power output: 100 kW (actual: 80 kW)
• Heat rejected to environment (Energy
wasted): 69.2 + 69.8 + 48.3 = 187.3 kW
• Out of 287 kW, only 100 kW is used!!!
– Which is only 35%
– Equivalent to wasting Rs. 1,630 per hr of
operation of one genset

24. Sankey Diagram

25. After installing heat exchanger

26. After employing heat exchanger and
stirling engine

27. JazakAllah Khair