| 摘要 |
Improvements in startup time for an electrochemical fuel cell system from freezing and sub-freezing temperatures are obtained by utilizing an insulate d fuel cell stack in combination with an thermal control subsystem. Temperatur e of the insulated electrochemical fuel cell stack, as well as temperature of the ambient environment, are monitored and a heating fluid is heated by thermal transfer with the environment under appropriate thermal conditions. The heated fluid is then passed to the insulated fuel cell in order to increase the temperature of the same, typically to a temperature at or near the temperature of the ambient environment. In this manner, ambient heat fro m the environment is utilized to increase the temperature of the insulated fue l cell stack, thus improving conditions for subsequent cold start of the insulated fuel cell stack. |
