热源塔换热性能研究与应用

发布时间：2018-07-05 00:57

本文选题：开式横流热源塔 + 数值模拟　；参考：《南京师范大学》2015年硕士论文

【摘要】：能源是社会发展的基础,但随着能耗的增加,能源问题也开始暴露出来。人们一方面开始节约能源的消耗,另一方面发展新兴技术来代替原有能源消耗大的技术问题。目前,暖通空调的节能研究已成为一个重要的课题。结合我国长江以南区域的气候特点,新型换热设备一热源塔的研究也发展起来。本文结合当前暖通空调系统领域常见的几种冷热源方案与热源塔进行对比,并简单介绍了热源塔与冷却塔之间的不同之处,对热源塔及其系统进行了综合阐述。通过对热源塔进行分类,重点以热源塔中的开式横流热源塔为例介绍了塔内的热质交换原理及冬夏两季塔内的空气变化状态。通过国内学者在热源塔及国外其相关方面的研究,结合实际工程应用对热源塔及其系统的技术对研究的热源塔有一定的认知。热源塔作为由冷却塔改造而来的产物,在一定程度上与冷却塔有相似之处,故本文在借鉴冷却塔换热性能研究的基础上,以某厂家的方形开式横流热源塔作为研究对象,利用FLUENT软件中的DPM模型对开式横流热源塔内冬夏两季换热过程进行数值模拟。通过计算,获得了热源塔塔内空气速度分布图、空气温度分布图、压力分布图、密度分布图以及塔内水／溶液温度分布图。采用定风量与定溶液量两种方式,对比分析得到了冬季工况下热源塔气液比优值。基于厂家的进行的热源塔性能测试实验数据进行整理计算,得到了冬季工况下的热源塔气液比实验数值,并将实验获得的气液比优值与模拟结果相验证,其两者误差较小。最后,本文以某医院综合病房大楼冷冻机房改造工程为案例,分析热源塔在其改造工程中的设计选型方案及冬夏两个季节下热源塔系统运行过程,为热源塔工程应用提供了有价值的参考。
[Abstract]:Energy is the foundation of social development, but with the increase of energy consumption, energy problems are also exposed. On the one hand, people are beginning to save energy consumption, on the other hand, to develop new technology to replace the original energy consumption technology. At present, the energy saving research of HVAC has become an important subject. The climate characteristics of the region and the research of a new heat exchanger, a heat source tower, are also developed. In this paper, several common cold and heat source schemes in the field of HVAC system are compared with the heat source tower, and the difference between the heat source tower and the cooling tower is briefly introduced, and the heat source tower and its system are expounded comprehensively. The principle of heat and mass exchange in the tower and the air change in the two Pagoda in the winter and summer are introduced with emphasis on the principle of the heat and mass exchange in the tower and the state of the air in the summer and summer. As the product of the cooling tower, the heat source tower is similar to the cooling tower to some extent. Therefore, on the basis of the study of the heat transfer performance of the cooling tower, this paper takes a square open crossflow heat source tower as the research object, and uses the DPM model in the FLUENT software to heat the two season heat exchange in the open crossflow heat source tower in winter and summer. Through the calculation, the air velocity distribution map of the tower tower, the air temperature distribution map, the pressure distribution map, the density distribution map and the temperature distribution diagram of the water / solution in the tower are obtained. The gas and liquid ratio of the heat source tower under the winter season condition is compared and analyzed with two ways of the fixed air volume and the fixed solution quantity. The experimental data of the performance test of the heat source tower are arranged and calculated, and the experimental numerical value of the gas and liquid ratio of the heat source tower under the winter condition is obtained, and the results of the gas and liquid ratio obtained by the experiment are verified by the simulation results. Finally, the paper takes the reconstruction project of the cold freeze machine room of a Hospital Comprehensive Ward Building as a case, and analyzes the heat source tower in its case. The design and selection scheme in the reconstruction project and the operation process of the heat source tower system in the two seasons in winter and summer provide valuable reference for the application of the heat source tower.
【学位授予单位】：南京师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU83

【参考文献】