FIELD: generation of electric power. SUBSTANCE: straight-through steam generator has vertical tube system working on sliding pressure, furnace having outlet and heat exchanger surfaces made from plane tubes, finned tubes with one steam line (SLR) and finned tubes with many steam lines (MLR). All these tubes are manufactured as diaphragm walls from tubular panels. Steam generator includes fuel burners for burning fuel and air insides housing to form low-temperature, medium-temperature and high-temperature heat flows inside furnace. Fluid medium flows through tubes creating effective heat exchange. Plane tubes are located in low-temperature zones and fined tubes with one steam line (SLR) and finned tubes with many steam lines (MLR) are located in high-temperature and medium-temperature zones. EFFECT: enhanced efficiency at full and partial loads. 19 cl, 11 dwg
