Abstract
Dynamic behaviors of through-flow boiler are considered as serial connection of those of economizer, evaporator and superheater. Behaviors of economizer and superheater have been already analysed in several papers. This paper deals with the dynamic analysis of through-flow evaporator in case its pressure drop is negligible. Boundary points of evaporator are considered to be the ones fixed to the starting and terminating points of evaporation under the standard equibrium condition. Conclusion obtained from the analysis my be summerized as follows:
Dynamic behavior of pressure is represented by:
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This equation shows that through-flow boiler and drum type boiler are similar each other in dynamic behavior of pressure. Dynamic behavior of enthalpy at outlet point is represented by: ie=Fi (s) ii+Fr (s) r2+Fq (s) qi+Fp (s) P
Due to the change of outlet enthalpy, the pressure has self-regulation characteristic.
