溶液除湿空调系统的性能分析与实验研究

发布时间：2018-01-03 16:30

本文关键词：溶液除湿空调系统的性能分析与实验研究　出处：《南京航空航天大学》2015年硕士论文　论文类型：学位论文

【摘要】：当前在全球能源危机的大背景下,建筑节能尤其暖通空调领域的节能越来越不可忽略。凭借出色的节能效果和空气处理能力,温湿度独立控制系统(THICS)作为一个新的理念被提出后受到了很广泛的关注,而其中的溶液除湿系统节能效果最为显著,湿度控制能力也最好。在总结了前人提出的溶液除湿空调系统,综合考虑可行性,简易性和投入产出比后本文提出了一种预冷式全新风溶液除湿空调系统。在夏季工况下,外界的高温高湿空气先由高温冷却水预冷后送入除湿器,经除湿降温后送入空调室。除湿溶液温度由蒸气压缩制冷系统调控,溶液再生的热量由冷凝废热提供,充分利用溶液的除湿能力和蒸气压缩制冷的可靠性,稳定性。论文的主要工作有:首先对除湿器/再生器建立物理模型,对出口参数进行了数值求解,得到了沿程空气和溶液状态参数的分布规律,运用MATLAB软件编程计算得到传热效率和传质效率随进口参数的变化关系。其次搭建了溶液除湿空调实验平台,对机组进行了实验研究,得到了进口参数对处理空气和再生空气出口参数的影响,实验数据和软件计算结果的误差在10%以内。对于整个机组,空气参数对其性能影响比溶液参数的影响更大,处理空气质量流量、温度、含湿量增大时,机组的三个性能系数均提高。最后,基于热力学第二定律对系统进行了火用分析,得到各部件的火用损,找到系统不可逆损失最大的部件—冷凝器和蒸发器,并提出了改进措施。
[Abstract]:Under the background of the global energy crisis, building energy saving, especially in the field of HVAC, is becoming more and more important. As a new idea, the independent temperature and humidity control system (THICS) has been widely concerned, among which the solution dehumidification system has the most remarkable energy saving effect. The humidity control ability is also the best. After summing up the solution dehumidification air conditioning system, the feasibility is considered synthetically. After the simplicity and input-output ratio, a new pre-cooling air desiccant air conditioning system is proposed in this paper. In summer, the high temperature and high humidity air from outside is precooled by high temperature cooling water and then fed into the dehumidifier. The temperature of dehumidified solution is controlled by vapor compression refrigeration system, and the regenerated heat of solution is supplied by condensing waste heat. The dehumidification capacity of the solution and the reliability of steam compression refrigeration are fully utilized. The main work of this paper is as follows: firstly, the physical model of dehumidifier / regenerator is established, the outlet parameters are numerically solved, and the distribution of air and solution state parameters along the range is obtained. The relationship between heat transfer efficiency and mass transfer efficiency with inlet parameters was calculated by using MATLAB software. Secondly, the experimental platform of solution dehumidification air conditioning was built, and the experimental research on the unit was carried out. The effect of the inlet parameters on the outlet parameters of the treated and regenerated air is obtained. The error between the experimental data and the calculation results of the software is less than 10% for the whole unit. The effect of air parameters on its performance is greater than that of solution parameters. When the air mass flow, temperature and moisture content increase, the three performance coefficients of the unit are all increased. Based on the second law of thermodynamics, the exergy analysis of the system is carried out, and the exergy loss of each component is obtained. The condenser and evaporator, which have the greatest irreversible loss, are found, and the improvement measures are put forward.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU834.9

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