Method for exhaust waste energy recovery at the internal combustion engine polygeneration plant
OwnerStanislav Sinatovinventor
Life of this patent
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Abstract
A method for exhaust waste energy recovery at the internal combustion engine polygeneration plant with the gas engine or gas turbine prime movers which includes supplying this plant with any on-site available methaneous gas (MG), converting from 20 to 30% of supplied MG into electric or mechanical power and producing a liquefied MG (LMG) co-product from the other 80-70% of supplied MG at a rate of 0.5-0.9 ton/h for each MW of engine output through converting and harnessing an engine exhaust as an effective refrigerant.
Claims8
A method for an exhaust waste energy recovery at an internal combustion engine (ICE) polygeneration plant, comprising in combination:
- supplying said polygeneration plant with a methaneous gas (MG) at a rate exceeding an amount of a fuel required for the ICE operation;
- processing all the supplied MG to meet the parameters and quality standards specific by its following liquefaction;
- selecting a type of the ICE for installation at the polygeneration plant from a group comprising a twin-shaft gas turbine and a lean burn supercharged reciprocating gas engine;
- supplying the polygeneration plant with an atmospheric air which is at least partially used as a combustion air in a selected ICE;
- pressurizing the combustion air with use of at least one compression means so providing a high pressure (HP) combustion air required for operation of the selected ICE;
- burning a mixture of said fuel with the HP combustion air and following expanding a formed combustion gas down to a low-pressure (LP) in said selected ICE, resulting in producing a first part of a gross power output of said polygeneration plant and releasing a low-pressure (LP) exhaust gases stream comprising a mixture of nitrogen, oxygen, carbon dioxide and water vapor at a high temperature;
- recovering an exhaust waste energy through producing the remainder of the gross power output of said polygeneration plant, converting the LP exhaust gases stream into a useful refrigerant and using said refrigerant for producing a liquefied MG (LMG) co-product from a major part of a processed MG;
- harnessing a minor non-liquefied part of the processed MG as the fuel for the selected ICE;
- providing a net power output of the polygeneration plant at a level which is equal to or above a power output of the selected ICE operated in a simple cycle mode;
- and
- providing a power output of the polygeneration plant re-counted with consideration of a power equivalent of the LMG co-product at a level which is above a power output of the selected ICE operated in a conventional combined cycle mode.
Dependencies are inferred from the claim text.