应用气溶胶水喷雾提高翅片管的冷却效率

A. Shlepkin, A. Morozov, A. Sorokin
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引用次数: 0

摘要

本文概述了使用水-空气混合物从受热表面去除热量过程的实验和计算研究工作。即使在空气中加入质量含量为0.1%的水,传热系数也会急剧增加。列举了决定换热过程效率的因素:喷水射流的形状、水气流动出口点到换热表面的距离、换热表面的特性、射流形成的方法、液滴的大小和液滴流动出口点的位置。文献中可用数据的弱适用性表明,用于计算使用水-空气混合物的工业热交换器翅片管的冷却。研究表明,由于换热过程的复杂性和影响因素的大量存在,为了对单个换热表面建立最优的冷却方式,有必要进行实验研究。研究表明,WWER-1200被动排热系统换热器翅片管具有一些影响其水气混合冷却效率的重要特性。建立了一个实验装置,并提出了一种技术来进行实验,研究这些过程,并将其应用于被动WWER安全系统的热交换器。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
APPLICATION OF AEROSOL WATER SPRAY TO INCREASE THE EFFICIENCY OF COOLING OF FINNED TUBES
The article presents an overview of works on the experimental and computational study of the processes of heat removal from heated surfaces using a water-air mixture. A sharp increase in the heat transfer coefficient is shown even when adding water with a mass content of 0.1 % to the air flow. The factors that determine the efficiency of the heat exchange process are listed: the shape of the water spray jet, the distance from the outlet point of the water-air flow to the heat exchange surface, the characteristics of the heat exchange surface, the method of jet formation, the size of droplets and the location of the outlet points of the gas-droplet flow. The weak applicability of the data available in the literature is shown for calculating the cooling of finned tubes of industrial heat exchangers using a water-air mixture. It is substantiated that in order to establish the most optimal cooling modes for each for a separate heat exchange surface, it is necessary to conduct experimental studies, due to the complexity of heat transfer processes and the presence of a large number of influencing factors. It is shown that the finned tubes of heat exchangers of the passive heat removal system of WWER-1200 have a number of important features that affect the efficiency of their cooling using a water-air mixture. An experimental setup has been developed and a technique has been proposed for performing experiments to study these processes as applied to heat exchangers of a passive WWER safety system.
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