TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Components: The fuel cell is a direct methanol fuel cell. A permeable membrane is provided through which only the methanol is permeable or the methanol is permeable together with water, so that the permeable membrane can extract the methanol from the windshield washer fluid. A permeable membrane unit (2) incorporating the permeable membrane is provided in the windshield washer container. It is disposed horizontally in the vicinity of a bottom of the windshield washer container. It has a width that is smaller than a width of the windshield washer container, and an inside space connected via a pipe (21,22) to a methanol tank (12) provided outside the windshield washer container, and the methanol extracted through the permeable membrane unit is supplied into the fuel cell via the metal methanol tank. The methanol tank has a volume smaller than that of the windshield washer container. A circulating pump (4,15) is provided in a passage of the pipe to forcibly draw and convey the methanol into the methanol tank. A controller (30) is provided to control the circulating pump to adjust the concentration of the methanol stored in the methanol tank. The permeable membrane is provided on a side surface of the windshield washer container. A diffusion layer, the fuel cell, and an air filter (17) are successively disposed on an outer side surface of the windshield washer container where the permeable membrane is provided. The windshield washer container has a partition to divide the inside space into a methanol container and a surfactant container. The permeable membrane is provided on a side surface of the methanol container.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Materials: The permeable membrane is porous zeolite membrane, porous silica membrane, or porous organic membrane.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The liquid fuel contains liquid organic compound. The liquid fuel is ether, or alcohol such as methanol.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Materials: The permeable membrane is porous zeolite membrane, porous silica membrane, or porous organic membrane.