Energy conservation in gensets installed in comsats lahore
Jun 27, 2015
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.
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.
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Transcript
Energy Conservation in Gensets Installed in COMSATS Lahore
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
Intro
• Reason of Presentation– Energy Crisis– Energy Loss
Presentation Overview
• Sankey diagram• System’s Specifications• Heat Losses In the System• Solutions to Heat Losses• Summary
A Sankey Diagram
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
Gas Flow Rates
• Radiator cooling air flow: 192 ft3/min• Combustion air flow: 6 ft3/min• Exhaust gas air flow: 17.6 ft3/min
Exhaust gas temperature: 585 oC
Heat Losses (kJ/hr)
• Heat rejected to:– Exhaust system: 249,000– Water & lube oil: 251,000– Radiation to room: 174,000
List of All Energy Losses
• Flue gas loss• Loss to coolant and lubricating oil• Radiation loss• Vibration loss• Sound loss
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
Solutions (contd.)
Use the heat of engine body
Heat Exchanger Around the Exhaust Pipe
Heat Exchanger Around the Exhaust Pipe
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.
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.
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.
Heat of Engine Body
• Emits more heat than carried by flue gases– Employ a Stirling engine
Stirling Engine
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
Sankey Diagram
After installing heat exchanger
After employing heat exchanger and stirling engine
JazakAllah Khair
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