| 摘要 |
PURPOSE:To make uniform temperature distribution within a cell stack by gathering cooling media of gas and liquid mixture from each cooling body in a common gathering compartment, and commonly applying gas pressure in the compartment to cooling media in each cooling body. CONSTITUTION:Cooling bodies 3 in each of which a cooling pipe 4 is buried are arranged in a fuel cell. Each cooling pipe 4 is connected to a common inlet gathering pipe line 6 through pipe 4b, and connected to a common outlet gathering pipe line 16 through pipe 4c. Liquid medium 5a within a cooling medium reservoir 18 is supplied to each cooling pipe 4 with a pump 8 through the inlet gathering pipe 6. Two phase mixed media of gas and liquid generated by boiling are supplied to the outlet gathering pipe 16, and liquid phase is sent to the reservoir 18 and gas phase is to a vapor exhaust pipe 17. Since operating temperature of each cooling body 3 is set by only pressure of gas phase of the outlet gathering pipe 16, temperature of each part is uniformly kept even if the number of stacks of the cell is increased. |
