A SYSTEM FOR RECOVERY OF ENERGY FROM A RESIDUAL GAS

The present invention relates to a system (1) for conversion of energy in a residual gas generated in an industrial process. The system (1) of the present invention comprises a combustion chamber (2) having a fuel inlet (3) configured to receive a flow of residual gas for combustion in the combustion chamber (2). The combustion chamber (2) further comprises an air inlet (4). The system (1) according to the present invention comprises a Stirling engine (5) configured to convert heat from the combustion chamber into mechanical energy, the Stirling engine having a heat exchanger (6) having a cross-section, wherein at least a portion of the heat exchanger (6) extends into the combustion chamber (2). According to the present invention, the system (1) further comprises a residual gas duct (7) being arranged for transporting the residual gas at atmospheric or near atmospheric pressure and an air duct (8) being arranged for transporting air at atmospheric or near atmospheric pressure. The system (1) of the present invention further comprises a gas diffusion chamber (9) comprising a residual gas inlet (10) through which the residual gas enters the gas diffusion chamber (9) from the residual gas duct (7), and a residual gas outlet (11) being in fluid communication with the fuel inlet (3) of the combustion chamber (2), wherein the residual gas is transported in a diffusion direction from the residual gas inlet (10) to the residual gas outlet (11). The gas diffusion chamber (9) has such a shape that the flow of residual gas at the fuel inlet (3) is substantially laminar and has a symmetric velocity profile.