|What is cogeneration?
The concept of cogeneration
means the combined production of
electric energy and heat. Unlike the classic power plant, where
heat produced in the creation of energy escapes into the environment, a
cogeneration unit uses the heat produced for heating and thus saves both fuel
and money needed for its purchase.
|How does a cogeneration unit works?
in all power stations originates in the spinning of electrical generators with
the help of turbines.The heat
necessary for the production of steam, which drives the turbine, mainly comes
from the burning of coal or the fission of atomic nuclei. Most of the heat is
not used however, and is released into the atmosphere. The nuclear power plant
at Dukovany therefore
operates at 26% efficiency.
The Temelín NPP is
designed to have 32% efficiency.
The effectiveness of production in heating power stations runs at around 30%;
the most modern steam-gas power plants at around 50%, and of course, with
further losses of around 11% during the transformation and transfer of
electricity from a distance. In cogeneration units the electricity is generated
in the same way as in other power plants - the spinning of an electric
generator, and that with the aid of rotary gas-burning motors. Motors in cogeneration units are
built as standard around natural gas,
but can also burn other liquid or gas
The heat, which is
released by the burner motor, is the means of cooling the motor, oils and waste
gases are effectively used, and thus the efficiency of cogeneration units is at
around 80 - 90%.
|Why to invest in cogeneration?
- To reduce electric costs
- To increase plant efficiency
- To reduce your dependance on expensive utility power
- To earn high rate of return on your investment
|What are the areas of application for cogeneration?
Cogeneration brings energy savings to a wide range of
- Chemical Industries
- Pulp and Paper Industries
- Textile and Sugar Industries
- Food Processing Industries
- Pharmasecutical Industries
- Hotels, Universities and Hospitals
|What are the advantages of cogeneration?
Using the cogeneration method
to produce heat and electricity involves a roughly 40% saving on fuel. In money terms
this means that the same amount of energy costs the user only 60% of the price,
or for the same amount of fuel the user gains nearly twice as much energy,
of which part can be sold, thus further reducing his own costs. A range of gas
companies also provide various forms of discount on the consumption of gas
for cogeneration. Heat and
electricity are also generated at the point of consumption, by
which costs for the distribution of energy and loss from distant distribution
are cut. Heat originating in cogeneration units is used to heat buildings, to
prepare hot water or to prepare technological heat. Cogeneration units therefore can be part of emergency sources of electrical energy
at the point of its continuous consumption. With the help of absorption
exchangers it is possible to use the generated heat to produce coolants for technological
purposes or air-conditioning.
In such cases we speak of so-called tri-generation - the combined production of
electricity, heat and cold. Therefore the economic return of TEDOM cogeneration units usually
runs at around 3 - 5 years
depending on output and method of use. Because using the cogeneration method of
production for heat and electricity saves about 40% of fuel costs, from the ecological point of view
cogeneration units reduce the damage
to the environment by a similar level. Therefore cogeneration
units are currently among the most acceptable ways of producing heat and
electricity in both the ecological and economic senses.