INTERLOCK SYSTEM BETWEEN LIQUEFIED GAS SUPPLIER AND POWER GENERATOR

摘要

PURPOSE:To widen operation range with the lower limit of a power generator load set low by restricting the lower limit of a power generator load based on a signal for the lowest amount of fuel gas charge which is calculated from a varying boil-off gas generation amount and the lowest stable load of an operating vaporizer. CONSTITUTION:The flow amount of fuel gas supplied to a power generator 7 is given as a sum of BOG gas flow amount discharged from a BOG compressor 6 and liquefied gas flow amount discharged from a vaporizer 4. BOG gas generation amount is estimated by computer simulation etc. At a liquefied gas supplier side, a signal for the lowest amount of fuel gas charge is prepared from data concerning estimated value of BOG generated gas amount, operating condition of the liquefied gas vaporizer, and whether liquefied gas is received or not etc. and its signal is transmitted to the power generator 7 side. When the power generator consumes fuel gas more than the value indicated by this signal, a vaporizer operation load will not go lower than the lowest stable load and the pressure in the main fuel gas line is satisfactorily controlled.