POWER GENERATION SYSTEM AND METHOD WITH ORGANIC RANKINE CYCLE USING COLD SOURCE OF LNG CARRIER CARGO TANK

摘要

PURPOSE: A system and method for generating power with an organic Rankine cycle for a liquefied natural gas (LNG) carrier using cold heat from an LNG cargo are provided to improve efficiency in generating the power. CONSTITUTION: A system and method for generating power with an organic Rankine cycle for a liquefied natural gas (LNG) carrier using cold heat from an LNG cargo includes a heating medium-heat exchanger (2), an organic refrigerant evaporator (6), a gas turbine (8), and an organic refrigerant condenser (10). The heating medium-heat exchanger raises the temperature of a heating medium (3) such as steam or hot water using waste heat gas (1). The organic refrigerant evaporator allow the hot heating medium to heat-exchange with an organic refrigerant (5) which is pressurized at high pressure by an organic refrigerant pump (4), and then evaporates the organic refrigerant. The gas turbine expands the evaporated organic refrigerant (7) at the high pressure in order to generate electricity. The LNG fuel vaporizer allows the expanded organic refrigerant (9) to heat-exchange with cooled glycol-water (11), and then condenses the expanded organic refrigerant.