Technical Report STEADY-STATE EVAPORATOR MODELS OF SOLAR SEA POWER PLANTS Part I.

摘要

In [1], a methodology is developed for modeling the dynamic and steady-state behavior of Solar Sea Power Plants (SSPP). Throughout [1], all material properties, and, in particular, all heat transfer coeffi¬cients are assumed to be constant numbers. Because of the complexity of a Solar Sea Power Plant, dynamic modeling is an essential step prior to the design and construction of a prototype plant.nIn this report, the pertinent physical laws of heat transfer and mass balance are applied to develop a lumped parameter, steady-state model for tube-and-shell evaporators incorporating falling films. This model is analyzed to investigate the assumption of constant heat transfer coefficients in modeling the steady-state behavior of smooth-tube evapora¬tors operated in the turbulent flow regime. It is concluded that, for all practical purposes, the local heat transfer coefficient on the work¬ing fluid side of the evaporator tube is constant for both fixed and ±10% changes in the inlet working fluid flow rate.nThe overall objective of this research is to develop simulation models of a complete SSPP as tools of design and optimization. The steady-state evaporator model developed in this report is designed to become an integral component of this simulation model.