22 September 2011

STEAM GENERATION SYSTEM USING WASTE HOT WATER


By utilizing normally 80 to 90?waste hot water as one of heat sources, we have
developed and commercialized “Steam generation system”, which generates 0.3 to 0.6MPa(G) steam to be usable for a heat source of other processes. Low temperature hot water such as 80 to 90? discharged from factories or jacket cooling water from cogeneration
system will be often wasted because its temperature is too low to utilize in factories for heating, drying and so on.
As a conventional technology, absorption heat pump can generate high temperature hot water or low pressure steam. However the pressure of the steam generated only by
absorption heat pump is too low to utilize in various ways. On the other hand, low pressure steam can be raised by steam ejector that is driven by high pressure steam. In this system, firstly absorption heat pump is driven by 80 to 90? hot water to generate 0.1 to 0.2MPa(G) low pressure steam, and then the low pressure steam is pressurized by steam ejector to 0.3 to 0.6MPa(G). We EBARA cooperated with Tokyo Gas, MIURA for this development.