Abstract: A multiple pressure condenser has heating devices for the overcooled parts of the condensate, which devices are accommodated alone or preferably in pairs in one or more of the condenser parts. The heating devices have perforated droplet plates located one above the other, from which droplet plates the overcooled condensate drips downwards in steps and is heated to at least the saturation temperature of the condenser space by high pressure exhaust steam flowing upwards. The overcooled condensate arrives at the highest droplet plate via drain and rising ducts, which are connected to the space over the intermediate floor or floors which separate the exhaust steam spaces from the hot well.

Abstract: In the apparatus for preventing blowing out of the water supply in constant pressure air storage installations of gas turbine power plants, the layer of water, which is close to the surface in a cavern and in which dissolved air is concentrated, is withdrawn through tubes of a grate arrangement and a riser tube communicating therewith which extends in a water shaft and opens into a compensation basin, by introducing compressed air into the riser tube from an aeration tube. Consequently, the water of the cavern is transported into the water layer close to the surface in the compensation basin.