FORCED-FLOW STEAM GENERATOR

摘要

A forced-flow steam generator (1) having a surrounding wall (4) formed from steam generator pipes (2) which are welded in a gas-tight fashion and traversable by flow in the vertical direction, in which within the surrounding wall (4) there is arranged a passage collector (14) by means of which the outlet side of a first multiplicity of steam generator pipes (2) in parallel configuration is connected at the flow medium side to the inlet side of a second multiplicity, in series configuration with and downstream of the first multiplicity, of steam generator pipes (2) in parallel configuration, should have a particularly long service life and particularly low susceptibility to faults, independently of the operating state. For this purpose, the design parameters of the steam generator pipes (2) downstream of the passage collector (14) are selected such that the mean mass flow density in the steam generator pipes (16), in parallel configuration, of the surrounding wall (4) at full load of the steam generator (1) does not lie below 1200 kg/m2s.