Cogeneration - joint parallel production of electricity and heat. During primary production of electrical energy occurs disposal of generated heat in passing through the heat exchangers. This heat energy is used to heat the production cycles or district heating.
The fuel can be used natural gas, biogas (m. E. The gas generated by the decomposition of domestic waste) passing gas oil, propane-butane, coke oven gas, coal mine gas and other fuels.
The main feature of each cogeneration unit is the type of power unit, which is used in the work. Currently, most two main types of plants common: gas-turbine and gas-fired power plant. The choice depends on the type, generally on many factors, such as the customer's requirements, installation location, technical capabilities to establish teplozabora system and so on.
Advantages of cogeneration units:
- increase in fuel efficiency due to a higher efficiency;
- reducing harmful emissions into the atmosphere as compared with the separate production of heat and electricity;
- reducing the cost of electric power transmission, since cogeneration plants are placed in areas of thermal and electrical energy consumption, network losses are virtually absent;
- possibility of working with biofuel and other alternative fuels.;
- quiet and environmentally friendly equipment;
- providing its own boiler house's electricity needs.
As practice shows, the use of such systems it is advisable to connect to large energy systems. It is beneficial to both the energy company and the owner of the installation. The first has at its disposal an additional cheap electricity, which is sold to end users at affordable rates for themselves, and the owner at the expense of the plant in a continuous duty cycle is able to recoup the cost of its installation and operation has for the first three or four years of use.
Thus, to date, cogeneration units are an excellent alternative to the large energy networks, which are often simply unable to provide an uninterrupted supply of consumers with electricity and heat. A number of economic advantages, coupled with the availability of cogenerators makes these units almost ideal for virtually any energy facilities from residential complexes to the factory premises.