METHOD AND DEVICE FOR PROTECTING BYPASS DEVICE IN POWER DEVICE

摘要

PURPOSE:To reduce a temperature difference between the low temperature side and the high temperature side and to improve reliability by intercommunicating the low temperature side and the high temperature side and causing fluid for cooling on the low temperature side to flow to the high temperature side, in a bypass device to intercouple the outlet side of a compressor and the inlet side of an expansion turbine. CONSTITUTION:An expansion turbine 2 is driven by means of high temperature gas from a high temperature gas generating device 4. A compressor 1 is driven by means of an expansion turbine 2 and compressed air is fed to the high temperature gas generating device 4. Further, a generator 3 is coupled to the compressor 1 and the expansion turbine 2 through a single shaft. Meanwhile, a bypass device 7 intercouples the outlet side of the compressor 1 and the inlet side of the expansion turbine 2. In this constitution, the low temperature side 78 and the high temperature side 79 of the bypass device 7 are intercoupled through a communicating pipe 80 for cooling having a flow rate control valve 8. By causing fluid on the low temperature side 78 of the bypass device 7 to flow to the high temperature side 79, a temperature difference between the low temperature side 78 and the high temperature side 79 is reduced.