(57) Process for generating mechanical power by premixing a gaseous fuel with steam, burning
the fuel/steam mixture and expanding the hot combustion gas in a turbine. Preferably
the expanded gas is cooled to a temperature in the range of from 150°C to 250°C, and
then used for heating water by indirect heat exchange to a temperature in the range
of from 130°C to 200°C. The hot water may be evaporated into the gaseous fuel by contacting
it therewith countercurrently. Steam is thus generated at a relatively low temperature
by evaporating preheated water into the fuel gas stream to be burned in the combustion
chamber of a gas turbine. In this way waste heat of a low temperature level can be
put to good use.
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