多效蒸馏/多级闪蒸太阳能海水淡化系统数值模拟：第2部分——系统工作特性及影响因素分析

Numerical Simulation of Multi-Effect Distillation/Multi-Stage Flash Desalination System Powered by Solar Energy: Part 2——The System Operation Characteristics and Analysis

摘要: 在按设计工况确定的太阳能海水淡化系统及换热设备结构参数的基础上，根据广东地区夏至日环境温度和太阳能辐射情况，采用数值模拟的方法对所设计的五效太阳能海水淡化系统运行参数进行分析。在太阳能集热面积和蒸馏器结构参数不变的条件下，通过改变启动温度、浓海水再循环比、冷却海水温度及大气透明度，得到储热水箱热水温度、系统瞬态产水率、系统瞬态性能系数等参数随时间变化的关系，以及对系统日产水量的影响，从而为太阳能海水淡化系统运行提供依据。

Abstract: Based on the determined desalination system driven by solar energy and the structure parameters of the dis- tillatory in the system, the system operation characteristics were analyzed by numerical simulation under the conditions of solar intensity and ambient temperatures at June solstice in Guangdong. The system has five effect distillations. By changing the system starting temperature, strong brine circulation ratio, cooling seawater temperature and atmosphere transparency, the operation parameters of the system like the hot water temperature in the hot water reservoir, transient water produced rate and performance coefficient of the system were obtained by simulation, in which the solar collector area and structure parameters of the distillatory are invariant. The results are helpful for the system operation.