Patent ID: 6799425
Filing Date: 2004-10-05
Classification: F01K,F02C,F23L,F28D,Y02E

Abstract:
A method for converting thermal energy into mechanical work, a first (4) and a second means (9) for storing thermal energy being connected alternately into a turbine branch (T), comprising the steps of:a) compressing an oxidizing gas (11) such that a temperature of the oxidizing gas is raised from ambient temperature RT to a first temperature T1 and the pressure of the oxidizing gas is raised to a first pressure P1, b) cooling the oxidizing gas (11) down to a second temperature T2, c) leading the oxidizing gas (11) through the first means (4) for storing thermal energy, the temperature of the gas (11) being raised to a third temperature T3 in one step, d) expanding the oxidizing gas in a gas turbine (3) to substantially atmospheric pressure, the oxidizing gas (11) being cooled down from the third temperature T3 to a fourth temperature T4, e) feeding the oxidizing gas (11, 14) to a combustion chamber (6) connected downstream, f) burning biomass (7) together with the oxidizing gas (14), and g) leading flue gases (19) through the second means (9) for storing thermal energy.