Gas-turbine power station

In 50-60- X yr. 20 v. in the world practice received wide acceptance G. 3. with the gas turbine engines. Their total power to 1970 exceeded 2000 metals. Thus, in THE USA and Great Britain the thermal blocks with a power of SV. 500 MW, as a rule, are supplied with the gas-turbine units with a power of 25-35 MW for covering of loads in the hours "peak". Was received also the propagation of avtomatich. G. 3. on the base of avn. turbines with 2-4 gas turbine units (each with a power of 10-20 MW). G is structural. 3. can be placed on the semitrailer- vans or the RR platforms and are used in the places of the new developed layers of minerals, especially in the regions of layers oils, where G. 3. they can work on the casing-head gas, or in the regions of buildings as let us lie, power stations. G. 3. they can also serve as the reserve sources of power, switch oned in the case of appearance in the power systems of emergencies. G. 3., intended for covering of loads in the hours "peak", have the lightened thermal circuit of the bezregeneratsionnogo type, efficiency on the order of 20 - 25%; the cost of that established of the salmon of such power stations composes approximately 50% of cost of that established of the salmon of contemporary TES. G. 3. they have, as a rule, high degree of automation and remote control. Launching station and method of load, and also the work of vspomogat. of equipment (for example, the completion of fuel and oil tanks) usually are automated. Mobile G. 3. they adapt rarely, since they have low efficiency and relatively high cost of equipment on the comparison, for example, with the diesel power stations. There are projects atomic G. 3. (USA), in which the working gas (helium), heated to 800-y000°S, will come from high-temperature graphite-gas reactors.

Are promising the kombinirovannye steam-gas-turbine installations (PGU). In PGU of fuel- and air they bring under the combustion chamber pressure; combustion products and heated air enter gas turbine. After first stages of gas turbine the combustion products are removed into the intermediate combustion chamber, in which is burnt the part of the fuel due to excess oxygen, existing in the gases. From the intermediate combustion chamber the combustion products enter the subsequent steps of the turbine, where their further extension and cooling occur. The heat- waste gases it can be used for preheating of water or production of vapor of low pressure in the steam generator. Air into the combustion chamber will be given with the compressor, placed on one shaft with the turbine. Tech. diagram G. 3. it is characterized by simplicity, small quantity of vspo-mogat. of equipment and conduits. Kombinirovannaya PGU in the normal mode works on the steam turbine cycle, and for covering of loads in the hours "peak" in the power system it is thrown to steam-gas cycle. In this case it is possible to obtain high initial temperatures of working medium and comparatively low temperatures of the heat removal, that also determines increased efficiency in PGU with some reduction in the capital expenditures.

THE USSR'S first steam-gas-turbine installation with a total power of 16 MW was released in 1964 on Leningrad Gus -1 as the superstructure above the existing steam turbine (30 MW). Following this installation was created the project PGU with the power of 200 MW. They enter into the composition of steam-gas block: the gas turbine (35-40 MW), calculated for the temperature of the gas before the turbine of "00-""0°S; series steam turbine (160 MW) - to the parameters of vapor i3 MN/m² and of shch'shch/shch'shch°S; the high-pressure steam generator with a productivity of 450 t/h - to the parameters of vapor 14 Mn/m² and shch"0/shch"0°S.

It is cast. see with the articlesgas turbine, mobile electric generator.

In. A. prokudin.