of high temperature and pressure application_number US 25873281 A description the cycles of types i ii iii and iv of the present invention will be described in detail below with reference to the accompanying drawings fig2 illustrates the cycle of type i of the present invention in terms of a p v diagram first it is assumed that in the circulation cycle 1 34 u2192 1 u2192 1 34 which operate under the pressure p 1 the heat q 1 for superheating the steam during the transformation of state 1 34 u2192 1 is derived from the counterflow heat exchange between the waste gas and the steam and this heat exchange proceeds ideally then tw t 1 and tw 1 t 1 34 are always satisfied in the diagram of fig3 a because this a gas gas heat exchange which entails no transformation of phase here t 1 34 represents the temperature of the saturated steam and t 1 the temperature of the superheated steam under the pressure p 1 and tw represents the temperature of the waste gas before the heat exchange and tw 1 the temperature of the waste gas after the first heat exchange as soon as the waste gas has supplied heat to the superheater and has consequently undergone a temperature drop it begins to exchange heat with the condensed cold water which has been given an increased pressure by a pump again in this case tw 1 t 1 39 and tw 0 t 0 are satisfied in the diagram of fig3 b on the assumption that there proceeds an ideal gas liquid heat exchange without entailing any phase change here.