Patent ID: 6955052

Claim:
A method for producing power from combustion of a fuel which comprises: a. feeding a pressurized Oxygen-containing gas and then a combustible fuel to a first combustion zone of constant volume to form a combustible mixture therein combusting said combustible mixture in said first combustion zone under substantially adiabatic conditions to form gaseous combustion products and exhausting said gaseous combustion products from said first combustion zone at a first predetermined range of elevated temperature and pressure in a first cycle; b. feeding a pressurized Oxygen-containing gas and then a combustible fuel to a second combustion zone of constant volume to form a combustible mixture therein combusting said gaseous combustible mixture in said second combustion zone under substantially adiabatic conditions to form gaseous combustion products and exhausting said gaseous combustion products from said second combustion zone at said first predetermined range of elevated temperature and pressure in a second cycle; c. feeding said exhausted gaseous combustion products from each of said combustion zones to a mixing zone, forming in said mixing zone an admixture of said exhausted gaseous combustion products and a secondary gas at a second predetermined range of temperature and pressure lower than said first predetermined range; and expanding said admixture in a work-producing zone whereby work is generated by said expansion; d. alternately repeating said first and second cycles, each of said cycles being operated to provide a substantially continuous stream of exhausted gaseous combustion products sequentially from said first and second combustion zones to said mixing zone; and e. feeding the admixture of said exhausted gaseous combustion products and said secondary gas to said work producing zone.