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Cogeneration

BHKW Umweltamt © Stadt Frankfurt am Main
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Cogeneration integrates electricity and heat generation. The heat which develops during the electricity generation is also used. Cogeneration uses energy sources in a perfect way: up to 90% of the engaged energy is used. Compared to the conventional production of heat and electricity, cogeneration saves up to 40% primary energy. As a consequence, combined heat and power helps to reduce CO2 emissions in a crucial way.
Ordinarily combined heat and power units are run on natural gas or fuel oil. Particularly cogeneration units based on alternative or renewable fuels are very lucrative and ecofriendly. Possible alternative or renewable fuels are: landfill gas, biogas, sewage gas, wood pellets, biodiesel.

Blockheizkraftwerk Windthorststraße
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CHP is also advisable for industry

Combined heat and power units are profitable when they often run. 5000 hours per year are considered as a benchmark.
With more than 10.000 kWh of heat demand it is very advisable to use CHP for office buildings.
If there is also a constant electricity requirement besides the heat demand, it is economically reasonable to use CHP. It is especially interesting to implement a cogeneration unit for the following businesses: bakeries/meat markets, laundries/printers, greenhouses/farming, office blocks, hotels/asylums, multi-family houses.

CHP - exchange of experience

By now Frankfurt operates more than 200 decentralized facilities of combined heat and power. In 2005 Frankfurt’s CHP facilities delivered a highly satisfactory annual result since their average availability surpassed the conventional ones.
Since 1997 Frankfurt’s municipal energy agency gathers the CHP’s factory data and discusses it with the CHP operators in an annual meeting.
This exchange of experience is very important for the operators in order to socialize, profit from other’s know-how, to inform about new general conditions for CHP and to learn about new technologies.