竹材在循环水冷却系统中的应用

淋水填料是循环水冷却系统的重要组成部分,其散热性能占冷却塔整体散热性能的60%～70%,直接影响循环水冷却系统的工作效率。因此,合理的填料选择对冷却系统的节能优化有非常重要的作用。概述了淋水填料的发展历程,重点介绍了竹材作为新型降温材料在循环水冷却系统中的应用,总结了竹填料的特点、热力性能及技术研究现状,并对其进一步应用提出几点建议:竹材的传热传质性能、耐老化和耐久性等应进行深入研究; 提高竹填料的设计和加工自动化规模化水平,合理开发以竹质复合材料为原材料的填料,在保证良好的热力性能的同时,提高抗腐蚀效果。
The core of an evaporative cooling tower is fill. As an important unit in the circulating water cooling system, the thermal performance of fill is account for 60% to 70% of cooling tower. It provides a vastly expanded air-water interface for heating of the air and evaporation to take place, and increases the contact time between two fluids. The cooling tower will supply cool water with fixed amount and temperature if the fill is in good condition and clean. But if the packing is damaged or plugged, or some of it is missing, the tower will not produce adequate cooling water. Therefore, it is important to choose reasonable fill material for energy-saving optimizing of water cooling system. In this paper, the main objective was to compare the fill characteristics of the cooling tower and introduce a new type of fill―bamboo fill. The various types of cooling tower fill and their advantages and limitations were described. With the development tendency of effective energy saving mode in the application of the fill material, a new type of energy-saving fill material was introduced, which was composed of bamboo and metal accessories. The characteristics and status of bamboo fill were summarized in aspects of shorter growing duration, lower planting cost and excellent physical performance. The bamboo fill had not only good dimension stability and ageing resistance but also some disadvantages at the same time. The following recommendations were made by the authors:the heat and mass transfer as well as the aging resistance should be further investigated; the design and manufacture of bamboo fill should be improved to realize good thermodynamic performance and corrosion-resistant; the mechanization degree and level of automation in the manufacturing of bamboo fill should be developed in order to raise the productive efficiency