Abstract
The design scheme of closed two-phase thermosyphon were suggested that can provide standard thermal operation of blades of high-temperature steam turbine. The method for thermosyphon calculation is developed. The example of thermal calculation was implemented, it showed that to cool the steam turbine blades at their heating by high-temperature steam, the heat can be removed in the rear part of the blades by air with the temperature of about 440°C.
Highlights
To produce electrical power at thermal power stations, the steam turbines with operating temperatures of up to 600qC and gas turbines with operation temperatures of up to 1500qC are used mainly
The example of thermal calculation was implemented, it showed that to cool the steam turbine blades at their heating by hightemperature steam, the heat can be removed in the rear part of the blades by air with the temperature of about 440qC
The closed two-phase thermosyphons are the devices that can provide standard thermal operation of turbine blades without any additional costs for the work of blowers and without a noticeable reduction in the temperature of operating vapors in the turbine circuit by blowing air, which cools the blade [6] using a part of the internal volume of blades as a thermosyphon
Summary
To produce electrical power at thermal power stations, the steam turbines with operating temperatures of up to 600qC and gas turbines with operation temperatures of up to 1500qC are used mainly. The most promising methods of cooling include internal liquid evaporative cooling in the hollow blades by a secondary refrigerant: a two-phase thermosyphon of the closed circuit. The closed two-phase thermosyphons are the devices that can provide standard thermal operation of turbine blades without any additional costs for the work of blowers and without a noticeable reduction in the temperature of operating vapors (gases) in the turbine circuit by blowing air, which cools the blade [6] using a part of the internal volume of blades as a thermosyphon. EPJ Web of Conferences high-temperature steam is supplied to the refrigerant, and it (the refrigerant) is turned into vapor, which moves towards the cooling surface in the rear part under the effect of the pressure drop between the zones of evaporation and condensation. The study is aimed at the development of the method for calculating a two-phase thermosyphon as a tool for cooling the blades of the high-temperature steam turbine
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