FIELD: mechanical engineering; engines. SUBSTANCE: method comes to evaporative expansion of working medium at maximum pressure, superheating of vapor to maximum temperature, expansion of vapor with takeoff for operation and drop of pressure to minimum value, regenerative cooling of vapor, condensation compression into liquid with heat takeoff, raising the pressure of liquid and its regenerative heating. Expansion of vapor with takeoff for operation is carried out isothermally by delivering external heat. Evaporative expansion of medium and superheating of vapor is carried out by regenerative heating with maximum pressure raised to supercritical value. Heat engine has cylinder 1, piston 2, external heat source 3, main regenerator 4, outlet valve 5, check valve 6, low-pressure circuit of additional regenerator 7, cooler-condenser 8, transfer pump 9, high-pressure circuit 10 of additional regenerator, boiler 11, inlet valve 12, pressure regulator 13 and boiler auxiliary circuit 14. EFFECT: enlarged operating capabilities. 2 cl, 2 dwg
