Heating device with irreversible thermodynamic cycle for heating installations having high delivery temperature

Abstract

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.

1 . Heating device with irreversible thermodynamic cycle, comprising:
 a first circuit for the circulation of a first operating fluid, said first circuit comprising:   evaporating means of said first operating fluid, said evaporating means removing thermal energy from a supply water flow for evaporating said first operating fluid;   compression means of said first operating fluid which compress said first fluid after the evaporation thereof;   condensation means of said first operating fluid which condense said first fluid after the compression thereof;   expansion means of said operating fluid;   a second circuit for the circulation of a second operating fluid, said second circuit comprising:   evaporating means of said second fluid which evaporate said second fluid by means of the thermal energy deriving from the condensation of said first fluid of said first circuit;   compression means of said second fluid which compress said second operating fluid after the evaporation thereof;   condensation means of said second fluid) which condense said second operating fluid after the compression thereof, said condensation means of said second fluid heating a delivery water flow (Hman) by means of the thermal energy deriving from said condensation of said second fluid;   expansion means of said second operating fluid;   
       wherein:
 said first circuit comprises first cooling means operatively provided between said condensation means and said expansion means of said first circuit, said first cooling means cooling said first operating fluid and heating a first partial flow of said supply water flow; 
 said second circuit comprises second cooling means operatively provided between said condensation means and said expansion means of said second fluid so as to cool said second fluid after the condensation thereof and so as to heat a second partial flow of said supply water flow independent from said first partial flow. 
 
     
     
         2 . Device according to  claim 1 , wherein said device comprises a delivery manifold and a return manifold of said supply water, and wherein:
 said delivery manifold comprises at least a first inlet for said supply water flow, a first outlet for said first partial flow of said supply water flow and at least a second outlet for said second partial flow of said supply water flow;   said return manifold comprises at least an inlet for said first partial flow and at least a second inlet for said second partial flow coming from said second cooling means, said return manifold comprising a main outlet for said supply water flow.   
     
     
         3 . Device according to  claim 2 , wherein said delivery manifold comprises a third outlet for a third partial flow of said supply flow independent from said first partial flow and from said second partial flow, said first compression means of said first circuit being configured so as to exchange thermal energy with said third partial flow for heating the same, said return manifold comprising a third inlet for said third partial flow heated by means of the thermal exchange with said compression means of said first circuit. 
     
     
         4 . Device according to  claim 2 , wherein said delivery manifold comprises a fourth outlet for a fourth partial flow of said supply flow independent from said first partial flow and from said second partial flow, said second compression means of said second circuit being configured so as to exchange thermal energy with said fourth partial flow for heating the same, said return manifold comprising a fourth inlet for said fourth partial flow heated by means of the thermal exchange with said compression means of said second circuit. 
     
     
         5 . Device according to  claim 2 , wherein said delivery manifold and said return manifold are hydraulically connected by means of a compensating hydraulic line. 
     
     
         6 . Device according to  claim 1 , wherein said second operating fluid has a density lower than that of said first operating fluid. 
     
     
         7 . Device according to  claim 1 , wherein said second operating fluid circulating in said second operating circuit is a water solution or even water alone. 
     
     
         8 . Device according to  claim 1 , wherein said first operating fluid is R600 and wherein said operating fluid is (Z)-2-Butene. 
     
     
         9 . Device according to  claim 1 , wherein said evaporating means of said second fluid and said condensation means of said first fluid are integrated in a same heat exchanger so that the thermal energy deriving from the condensation of the first fluid is directly transferred to the second fluid without intermediate passages. 
     
     
         10 . A heating installation, characterized by comprising a heating device according to  claim 1 .