Abstract
Test results are reported for a modern gas-turbine unit at a power plant as part of a steam-gas power generating unit. The rated power and efficiency of the gas-turbine unit under the plant operating conditions range from 250 MWand 37.5% for an ambient temperature of +28°C to 290 MWand 39% at –10°C and below. The corresponding gas temperatures at the inlet to the turbine (ISO standard) are 1230 and 1185°C. At half load, the specific heat flow rate increases by 17% and the heat flow rate with no load is 0.23 times that at full load. High efficiencies of the turbine machinery were obtained during the tests, with the highest efficiencies of the compressor and turbine at a level of 89%. At loads of 50 – 100% the combustion chamber operates without underfiring, essentially without CO formation, and with NOx emissions below 50 mg/m3. The CO emissions are much higher during no-load operation.
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