| 摘要 |
PURPOSE:To eliminate losses in energy conversion to enhance the rate of heat- recovery rate, by operating a volumetric type expander by means of steam produced from an evaporator, and by connecting a load to the expander through a clutch. CONSTITUTION:A heat recovery device is composed of an evaporator 16 through which heat source water such as factory effluent or the like is introduced,a volumetric type expander 18 such as a screw expander or the like, a condenser 20 and a pump 22, which are all connected through pipe lines 24 to form a close circuit. The outlet of the evaporator 16 is communicated with a high- pressure steam header 28 through a pipe line 24, and the inlet of the condenser 20 is communicated with a low pressure steam header 28. Further cooling water from a river or the like is fed through the condenser 20 to cool down the steam. Further, the volumetric expander 18 is coupled to a load 32 through a clutch 38 which is disengaged when a pressure sensor disposed in a pipe line 24 up stream of the expander 18 detects a pressure of working fluid which is lower than a predetermined value.
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