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Cogeneration: combined heat and power

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Christina Haas

on 22 October 2013

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Transcript of Cogeneration: combined heat and power

Cogeneration System:
combined heat and power

What is
How it works
Conventional power
Cogeneration plant
Conventional power plants

used to create electricity only
only 38% of the fuels can be turned into electricity
a bulk of the produced energy is waste heat
62% of the used resources are lost!

Cogeneration plants

create useful heat and electricity
38% of the fuel is turned into electricity, 50% of the fuel is turned into useful heat
12% of the used resources are lost!
and Disadvantages
Cogeneration or CHP is the simultaneous creation of electricity and useful heat

Cogeneration needs far less fuel than the conventional separate electricity and heat production.

Cogeneration systems can be powered with a huge variety of fuels

High efficiency
Increased reliability/ security of supply
Reduction in fuel consumption
Reduction of emission
(CO2 & greenhouse gases)


Electricity and heat demand must be high and simultaneous
Potential for high maintenance costs
High capital cost

Short explanation of topping cycle:

These systems generate electricity first, and the waste heat or exhaust is used in an alternate process.

These systems are the most commonly used CHP systems.

Short explanation of bottoming cycle:

This system is the reverse of the topping cycle system.

Heat from a manufacturing process is used to generate steam, which then produces electricity.

The excess energy from the industrial application is generated first, and then used to power an electric generator second.
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