A method for calculating the moisture load in the tailrace surge tank of underground hydropower station based on field tests

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2023-11-01 DOI:10.1016/j.ijthermalsci.2023.108538

Shengjie Wang , Xiangkui Gao , Zhili Ren , Yimin Xiao

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引用次数: 0

Abstract

As an important part of a hydropower station, the tailrace surge tank is usually buried deep underground. The indoor air is in contact with a large area of water, resulting in excessive air humidity, especially in the summertime when the hot and humid environment is harsh. Therefore, the moisture exchange process in the tailrace surge tank is first analyzed in this research. Based on this analysis, a method for calculating the moisture load is proposed. After that, the hot and humid environment in the tailrace surge tank at the Xiluodu hydropower station is tested for a year. The test results show that the relative humidity of the air at the tailrace surge tank's entrance is negatively correlated with the amount of moisture dissipation. Meanwhile, the rate of moisture dissipation exhibits a law of low in the summer and high in the winter, with summer lows of −103.2 kg/h and winter highs of 1404.7 kg/h. In addition, the fitting formula for moisture load in the tailrace surge tank is obtained in this paper by combining test data with mass transfer theory, and the relative error between the calculation results and the test results is less than 9.32%. The study's findings can be utilized as a reference when creating a ventilation and mechanical dehumidification plan for the tailrace surge tank's hot and humid environment.

查看原文本刊更多论文

提出了一种基于现场试验的地下水电站尾水调压池水荷载计算方法

尾水调压池作为水电站的重要组成部分，通常埋在地下较深的地方。室内空气与大面积的水接触，导致空气湿度过大，特别是在湿热环境恶劣的夏季。因此，本研究首先对尾水调压箱内的换水过程进行分析。在此基础上，提出了一种计算湿荷载的方法。之后，对溪洛渡水电站尾水调压池内的湿热环境进行了为期一年的试验。试验结果表明，尾水调压箱入口空气相对湿度与消湿量呈负相关。水汽耗散速率呈现夏低冬高的规律，夏低为−103.2 kg/h，冬高为1404.7 kg/h。此外，本文结合试验数据和传质理论，得到了尾水调压舱水分负荷的拟合公式，计算结果与试验结果的相对误差小于9.32%。研究结果可为尾水调压箱湿热环境下的通风机械除湿方案的制定提供参考。

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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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.