HEATING DEVICE WITH IRREVERSIBLE THERMODYNAMIC CYCLE FOR HEATING INSTALLATIONS HAVING HIGH DELIVERY TEMPERATURE

The present invention relates to a heating device with irreversible thermodynamic cycle. The device comprises a low temperature circuit and a high temperature circuit in which respectively a first and a second operating fluid circulate. Each circuit comprises evaporating, compression, condensation and expansion means of the respective operating fluid. The low temperature circuit absorbs thermal energy from a supply water flow for evaporating the first operating fluid. The thermal energy deriving from the condensation of the first operating fluid is used for evaporating the second fluid. Instead, the thermal energy deriving from the condensation of the second fluid is used for heating a delivery water flow. According to the invention, the two operating circuits each comprise cooling means interposed between the corresponding condensation and expansion means. Such cooling means are in thermal contact with independent partial flows of the supply water flow so as to heat the latter overall by means of thermal energy removed from the operating fluids circulating in the two circuits.