| 摘要 |
A power plant burning a fuel at a pressure exceeding the atmospheric pressure. A combustor (12) is formed with cooled walls (14) which form a feed water preheater, A by-pass conduit (104) with a control valve (106) for draining feed water is connected to a feed water conduit (82) between the feed water preheater (the combustor walls (14)) and an evaporator (66) in the combustor (12). This by-pass conduit (104) may be connected to a feed water tank (74). At very low load and in the case of a gas turbine trip, the necessary water flow for cooling the walls (14) of the combustor (12) may exceed the requirement of feed water to the evaporator (66). Under these operating conditions feed water may be drained off ahead of the evaporator (66) through said by-pass conduit (104). (Figure l) |
