apparatus for constant supply and drain of water tank and method for control it in fuel cell cogeneration system

摘要

PURPOSE: Quantitative supplying and exhausting apparatus of a water tank for fuel cell cogeneration system is provided to quantitively control controlling the supplying amount of tap water and the exhausting amount of stored constantly in spite of the difference of external conditions, thereby preventing unnecessary the inflow of tap water and the outflow of stored water, and minimizing the heat loss. CONSTITUTION: Quantitative supplying and exhausting apparatus of a water tank for fuel cell cogeneration system comprises a heat recovery part(1) of a fuel cell system, a water tank(2) connected to the heat recovery part through a coolant circulation pipe; a tap water supply pipe(5a) supplying tap water to the water tank; a stored water outflow pipe(5b) exhausting stored water in the water tank; a water tank drain control valve(6) installed in the stored water outflow pipe; an automatic flow control valve(7) installed in the tap water supply pipe and the stored water outflow pipe.