Numerical Simulation of Ammonia-Water Solution Based Heat Absorber

Michal Volf, M. Jeřábek, M. Demianenko
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Abstract

: This article provides an insight into the numerical simulation of an ammonia-water solution-based plate heat absorber, which is a crucial part of an absorption chiller. These chillers could be used as part of a stratified chilled-water storage tank configuration for coupling to a small modular reactor. The common approach utilized in the process of designing the chiller is to call the absorber a “black box” without considering the processes inside. It follows that the resulting design must be highly oversized to ensure reliable operation of the system. This article focuses on the obstacles that needs to be overcome in order to simulate the processes inside the absorber, such as stream breakup into separate droplets or absorption of ammonia. Unfortunately, we do not have any experimental data we could use to validate our simulations and thus this article should be looked at as a “proof of concept” and a possible guideline for simulations of similar phenomenon.
氨-水溶液型吸热器的数值模拟
本文对吸收式制冷机的关键部件——氨-水溶液型板式吸热器的数值模拟进行了深入研究。这些冷却器可以用作分层冷冻水储存罐配置的一部分,以耦合到小型模块化反应堆。在设计冷却器的过程中,通常采用的方法是将吸收器称为“黑盒子”,而不考虑内部的过程。因此,最终的设计必须非常超大,以确保系统的可靠运行。本文的重点是需要克服的障碍,以便模拟吸收器内部的过程,如流分解成单独的液滴或氨的吸收。不幸的是,我们没有任何实验数据可以用来验证我们的模拟,因此这篇文章应该被视为“概念证明”和类似现象模拟的可能指导方针。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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