US 9,810,102 B2
System and method for generating electric energy
Timo Erämaa, Helsinki (FI); and Heikki J. Salminen, Vaasa (FI)
Assigned to Finno Energy Oy, Lahti (FI)
Appl. No. 15/110,644
Filed by Finno Energy Oy, Lahti (FI)
PCT Filed Jan. 7, 2015, PCT No. PCT/FI2015/005007
§ 371(c)(1), (2) Date Jul. 8, 2016,
PCT Pub. No. WO2015/104458, PCT Pub. Date Jul. 16, 2015.
Claims priority of application No. 20145010 (FI), filed on Jan. 8, 2014.
Prior Publication US 2016/0326913 A1, Nov. 10, 2016
Int. Cl. F01K 21/04 (2006.01); F01D 15/10 (2006.01); F01K 23/10 (2006.01); F02C 5/12 (2006.01); F02C 9/16 (2006.01); F02C 9/50 (2006.01); H02K 7/18 (2006.01)
CPC F01K 21/04 (2013.01) [F01D 15/10 (2013.01); F01K 21/047 (2013.01); F01K 23/10 (2013.01); F02C 5/12 (2013.01); F02C 9/16 (2013.01); F02C 9/50 (2013.01); H02K 7/1823 (2013.01); F05D 2210/12 (2013.01); F05D 2210/13 (2013.01); F05D 2220/76 (2013.01); F05D 2260/964 (2013.01); F05D 2270/14 (2013.01); F05D 2270/16 (2013.01); Y02E 20/16 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An electric generator system having:
a turbine in connection with a generator and a compressor for converting energy fed to the turbine into electric energy with the generator and for using the energy fed to the turbine to compress air with the compressor,
a combustion chamber outside said turbine, wherein the combustion chamber is arranged to receive compressed air from the compressor and fuel from a fuel tank to initiate a combustion process and output combustion products into the turbine for rotating the rotor of the turbine, the combustion process within the combustion chamber being a cyclic combustion process, each cyclic combustion process comprising a compression phase and an expansion phase,
wherein the combustion chamber is pistonless,
one or more fuel input valves for providing fuel to the combustion chamber,
one or more air input valves for providing compressed air to the combustion chamber,
one or more output regulators exhausting the combustion products from the combustion chamber,
a heat exchanger in thermal interaction with the combustion products exhaust from the turbine for transferring heat from the exhaust combustion products into steam,
one or more steam input valves for providing steam to the combustion chamber,
an electrical control unit for controlling said one or more fuel input valves, said one or more air input valves, and said one or more out put regulators for running the cyclic combustion process in the combustion chamber and for controlling said one or more steam input valves for generating a time-dependent steam injection into the combustion chamber, such that during the compression phase of the cyclic combustion process, the one or more input valves are instructed open to provide the compressed air to the combustion chamber, and the one or more output regulators are instructed to build up pressure in the combustion chamber before the ignition of the fuel,
wherein the electrical control unit is arranged to control said one or more steam input valves for generating a plurality of steam injection pulses of the length of 1 to 100 milliseconds into the combustion chamber within a single cycle of the cyclic combustion process.