Abstract: An energy recovery system for a process means (100) comprises a compressor (1), a turbine (2) and a generator (4) being arranged to be driven by a main shaft (3). It also comprises a heat exchanger (5) on a first side being fluidly arranged between the compressor (1) and the turbine (2) and on a second side being fluidly arranged downstream of a process means (100). Heat emanating from exhausts of said process means (100) is transferred to an airflow of the compressor turbine (1, 2) assembly, which airflow is expanded in the turbine (2) which then powers the compressor (1) and the generator (4). Energy is thus recovered from the process, which energy is transformed into electricity so that the overall efficiency of the process is increased.

Abstract: The present invention relates to a heating device for generating heat and electricity, and it comprises a compressor, at least one heat exchanger for heating air of a working flow leaving the compressor, a turbine where the heated air of the working flow is expanded, and a generator. The device further comprises a fluidly separate burner circuit with a burner for providing hot combustion gases which circuit is connected with the at least one heat exchanger, and which parts are arranged in a way known per se and where the turbine during operation powers the compressor and the generator. The generator supplies electrical energy to a domestic or local electrical system and/or powers auxiliary devices of the heating device, and at least a part of the air of the working flow leaving the turbine and/or at least a part of the combustion gases of the burner flow are/is used for heating a building or a process.