| 摘要 |
PURPOSE:To prevent the freezing of instruments and instrument piping without the use of heating cable which may become an explosion firing source by controlling cooling water temperature in a branch pipe installed in an outlet exhaust water cooling pipe with a temperature control valve, and introducing the cooled water into a required part. CONSTITUTION:The cooling water heated at 170-200 deg.C by cooling a fuel cell 12 is exhausted to an outlet exhaust cooling pipe 14, and part of it is supplied to a warm water branch line 15 installed in the pipe 14. The cooling water temperature is controlled with a liquid expansion type temperature detector 20, a temperature controller 21, and a temperature control valve 17 which is controlled with the temperature controller 21 installed in the line 15 to avoid overheating. The cooling water whose temperature is controlled is introduced into instrument piping 4 through a traced line 2. The freezing of instruments and instrument piping is safely prevented without the use of heating cable which may become an explosion firing source. |
