A Study on Dynamic Characteristics of Combined Cogeneration Boilers(1st Report,Experimental Results at Cold and Warm Starts)

摘要

In a system constructed by combining a gas turbine with a generator and an unfired waste-heat-recovery boiler,the exhausted gas becomes the heat input to the boiler and thus,the characteristics of this heat input obviously differ from those of the heat input to a conventional boiler system. To clarify the dynamic characteristics of the unfired waste-heat-recovery boiler,a simple naturalcirculation loop tube was manufactured to simulate an actual boiler. The experiments on dynamic responses with step changes in heat input were carried out for the cold start of about 10℃ and the warm start of 50℃ or 90℃. Dynamic responses such as the drum pressure,the drum water level and the natural-circulation velocity were clarified experimentally.