板式海水淡化装置变负荷调节特性研究  

Study on regulation characteristics of the plate type seawater desalination unit under different load conditions

作　　者：杨洛鹏 赵一鸣 田永生 YANG Luopeng;ZHAO Yiming;TIAN Yongsheng(School of Thermal Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学热能工程学院,山东济南250101

出　　处：《山东建筑大学学报》2024年第3期26-30,54,共6页Journal of Shandong Jianzhu University

基　　金：国家自然科学基金项目(51976022)。

摘　　要：传统板式海水淡化装置无调节结构,难以适应船舶柴油机变负荷做功,而变负荷调节是拓宽其工作温度范围的关键,研究其变负荷调节特性对于开发高效的船用海水淡化装置具有重要意义。文章采用以可调式射流泵代替固定式射流泵的方式实现变负荷调节,依据结垢实验给定的最小海水浓缩因子,在射流泵方程中引入浓海水液位变量,将热力学方程与射流泵方程耦合为板式海水淡化装置变负荷调节模型。结果表明:调整调节锥行程可有效调节可调式射流泵的引射流体状态参数;海水淡化装置工作的热源热水温度范围从固定式结构的66~84℃扩展到可调式结构的29~84℃,相比于单纯依靠调节流量的固定式结构,可调式结构海水淡化装置具有更高的热效率。Traditional plate-type seawater desalination unit has no regulating structure,which is challenging to adapt to the variable load of marine diesel engine.Studying on its regulation characteristics under different load conditions is of great significance to develop efficient seawater desalination units.Adjusting the variable load of the unit plays a key role in broadening its operating temperature range.This study adopts the method of replacing the fixed jet pump with an adjustable jet pump to achieve variable load regulation.This model is validated by scaling experiments that determined the minimum seawater concentration ratio.The thermodynamic equation and the jet pump equation are coupled to form a variable load regulation model for the plate-type seawater desalination unite,which is established by introducing the liquid level variable of concentrated seawater to analyze its regulation characteristics under different loads.The findings demonstrate that by adjusting the spindle position,the state parameters of the ejecting fluid in the adjustable jet pump can be effectively adjusted.The operational temperature range of the heat source for the desalination unit expanded from 66~84℃ in fixed pump setups to 29~84℃ with the adjustable pump,which proves the higher thermal efficiency of the one with the adjustable jet pump.

关 键 词：海水淡化 板式换热器 可调式射流泵 调节特性 

分 类 号：P747.13[天文地球—海洋科学]