Abstract

Previously, a methodology was developed for modeling the dynamic and steady-state behavior of Solar Sea Power Plants (SSPP). Here, 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 evaporators operated in the turbulent flow regime. It is concluded that, for all practical purposes, the local heat transfer coefficient on the working fluid side of the evaporator tube is constant for both fixed and +-10% changes in the inlet working fluid flow rate. The overall objective is to develop simulation models of a complete SSPP as tools of design and optimization.

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