Device for coolant cooling in a gas turbine and gas and steam turbine with said device

Abstract

The aim of the invention is a device (100) for coolant cooling in a gas turbine (2) which, with a relatively simple construction and low plant complexity permits a particularly high degree of efficiency in using the heat produced on cooling the coolant from a gas turbine (2). Said aim is achieved, whereby a number of interconnected evaporator tubes (140, 150, 160, 170) for a flow medium, are arranged in a coolant channel (102), connected to the gas turbine (2), to form a forced throughflow steam generator. Said device (100) is preferably used in a gas and steam turbine unit (1, 1′, 1″) with a waste heat steam generator (30) on the exhaust gas side of a gas turbine (2), the heating surfaces of which are connected into the water-steam circuit (24) of a steam turbine (20). The evaporator tubes (140) of the device (100) are thus connected on the inlet side by means of a supply line (112) to the feed water train of the water-steam circuit (24) of the steam turbine (20).

Dependencies are inferred from the claim text.