STRAIGHT-FLOW STREAM GENERATOR WITH EVAPORATION TUBES ARRANGED IN A SPIRAL Russian patent published in 2001 - IPC

FIELD: mechanical engineering. SUBSTANCE: steam generator tubes are welded to one another tightly through fins and are connected in parallel. Surface structure of their internal side is provided for creation of high turbulence in medium flowing through them. In heated area of gas duct tubes are arranged in the form of spiral winding. For operation of such straight-flow steam generator also at low loads of approximately 20% of rated value without occurrence of too high thermal stresses steam generator tubes are designed so that geodetic loss of flowing medium pressure during their operation makes up at least 0.5-fold value of loss of flowing medium pressure due to friction. EFFECT: enhanced efficiency. 2 cl, 3 dwg