Devivce for liquefied gas supply

The liquefied gas supply is started. According to the invention, using the heat possessed by the cooling water for cooling the heat generated by the engine by vaporizing the liquefied gas, by reducing the steam production for the vaporization of the liquefied gas, the efficiency of energy utilization is increased, required for the steam production reducing the size of the boiler can reduce the cost and space required for the boiler installation. Vaporizer of the present invention for achieving the abovementioned objects is vaporised liquid gas; A heating medium to heat or vaporize the liquefied gas by heat exchange with the liquefied gas from the vaporizer; Through heat exchange with the heat medium, the engine cooling water and the steam for heating the heat medium; It is provided to the engine downstream of the engine cooling water heater for heating the heat medium through the heat exchange of the heat medium and the engine coolant; It is provided in the boiler downstream of the steam heater for heating the heat medium through the heat exchange of the heat medium and the steam; A heating medium tank for supplying the heat medium to the engine coolant heater and the steam heater; Engine for supplying the engine cooling water in the engine cooling water heater; Boiler for supplying the steam to the steam heater; And a fuel consumer receiving the liquefied gas vaporized in the vaporizer; It includes.