Regenerative cooling system

A regenerative cooling system (100) designed for a regenerative heat engine (1), the latter comprising at least one regenerative heat exchanger (5) having a high-pressure regeneration duct (6) in which a working gas (81) circulates to be preheated there, having been previously compressed by a compressor (2), while at the outlet of said duct (6) the gas (81) is superheated by a heat source (12) before being introduced into a gas expander (78) in which it is expanded to perform work on a power takeoff shaft (17), said gas (81) being then expelled at the outlet of the gas expander (78) and introduced into a low-pressure regeneration duct (7) of the regenerative heat exchanger (5), said gas (81)—by circulating in said duct (7)—surrendering a large portion of its residual heat to the working gas (81) circulating in the high-pressure regeneration duct (6), said system (100) being characterized in that it comprises:

• At least one cooling chamber (79) which surrounds entirely or partly the gas expander (78) and/or the heat source (12) and/or a hot gas intake duct (19) which connects said source (12) to said expander (78), while leaving open a gas circulation space (80) between said chamber (79) on the one hand and/or said expander (78) and/or said source (12) and/or said duct (19) on the other hand;
• At least one chamber inlet port (82) which is directly or indirectly connected to the outlet of the gas expander (78) and by which some or all of the working gas (81) expelled from said expander (78) via said outlet can enter into the gas circulation space (80);
• At least one chamber outlet port (83) which is directly or indirectly connected to the low-pressure regeneration duct (7) and by which the working gas (81) can leave the gas circulation space (80) before being introduced into said low-pressure duct (7).