FIELD: power plants with thermoemission conversion of thermal energy into electric energy. SUBSTANCE: vapor generator is made in form of circular container 1 filled with sintered metal fiber having capillary structure. Container 1 is divided into evaporating zone 4, of zones 4 and 6. Zone 5 is provided with channel for passage of gas mixtures. At one side, this channel is connected with inter-electrode gaps of thermoemission converters and at other side it is connected with surrounding space. Adjoining zone 5 is heat-removing section 8. Container 1 is provided with protective shield 11 and heat-removal device 9. Zone 6 is provided with holes 10. Gap between shield 11 and container 1 is filled with sintered metal fiber in heat-removing section 8. Branch pipes 13 and 14 are provided for connecting the channel with inter-electrode gaps of thermoemission converters and with surrounding space. EFFECT: enhanced reliability. 4 cl, 1 dwg
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