PURPOSE: To improve the coefficient of performance of an absorption type refrigerator operated by the exhaust heat of a fuel cell while the life of a battery cell is kept the same as before.
CONSTITUTION: The refrigerator cooling water temperature of an absorption type refrigerator 21 operated by the heat energy of the cell cooling water of a fuel cell 3 is measured by a refrigerator cooling water temperature detecting means 30 and inputted to a controller 31. The controller 31 calculates the optimum temperature set value of the cell cooling water of the fuel cell 3 from the refrigerator cooling water temperature and controls the steam flow fed to the absorption type refrigerator 21 via the valve opening of a steam flow control valve 6. The battery cooling water temperature of the fuel cell 3 is changed in response to the cooling water temperature of the absorption type refrigerator 21, and the coefficient of performance of the absorption type refrigerator 21 throughout the year is improved while the deterioration is made equal throughout the year and the life is kept at the same value as that in the past.
UEKUSA TSUNEO
SUDO ISAMU
WARATANI SHISEI
TAMURA TOYOICHI
NISHIZAKI KUNIHIRO
TOKYO GAS CO LTD