【作者】 张舸；

【导师】 张于峰； 房磊；

【作者基本信息】 天津大学 ， 热能工程， 2007， 博士

【摘要】 本研究旨在考察硅胶除湿转轮的空气净化能力,并找出影响净化能力的因素和优化转轮净化能力的方法,为开发以硅胶转轮除湿机为核心的热湿处理及空气净化技术提供一些依据。硅胶转轮的空气净化能力首先用两个实验进行了考察。一个实验测量了转轮改善可察觉空气品质的能力,另一个实验测量了转轮清除室内各种VOC类污染物的能力。两个实验的结果都证明了硅胶转轮具有显著的净化空气的能力,而且对各种性质的VOC类污染物没有选择性,还证实了硅胶转轮除湿机在运行参数会随时变化的除湿冷却空调系统中能够保持它的净化作用。针对室内VOC的多样性和实验的局限性,研究中还建立了各种VOC类污染物和热量、水分在转轮中的综合传递模型,用理论的方法来分析转轮对各种污染物的净化机理。经研究发现,延长普通除湿转轮的再生时间有利于VOC污染物的充分脱附。另外,从整体上来说,当再生温度处于常用除湿再生温度范围内的较高值时,转轮对于VOC有较好的净化能力。研究中还提供了选择有利于发挥空气净化效果的除湿冷却空调设备的方法,并推荐了两种有良好空气净化效果的除湿冷却空调系统,然后又将这些系统的能耗与传统的压缩冷却空调系统进行了比较。经计算发现,在新风量一样时,以热能形式为基准的两种系统的能耗已经低于压缩冷却系统。当新风量降为压缩冷却系统的25%时,两种系统的能耗分别降为原来的74%和65%,而且从理论上讲此时的室内空气品质仍然优于压缩冷却系统。但是如果都是以电能形式比较,则仍然是压缩冷却系统具有优势。更多还原

【Abstract】 This research aims to investigate the air cleaning effect of silica gel rotors, find and optimize the factors impacting on the air cleaning effect, and provide technical support for developing air processing technology with silica gel rotor as a component to offer thermal comfort environment and clean air.Two experiments were conducted to investigate the air cleaning effect of silica gel rotors. One experiment measured a rotor’s ability to improve perceived air quality, and the other measured its ability to remove VOC pollutants. The results of both the experiments showed that the silica gel rotor was very effective to clean the indoor air. It was also reflected that the rotor was not selective to VOCs which had different chemical properties, and the rotor kept its air cleaning effect in parameters-changing desiccant cooling systems.Seeing to the variety of VOCs and the limit of experiments, a comprehensive transfer model of VOCs, heat and water in the rotor was built, so that the transfer mechanism and performance of all kinds of VOCs in the rotor could be predicted. It is suggested by the calculated results that the regeration time needs to be longer than the rotor only used to dehumidify air to fully desorb the VOCs on the rotor, and the regeneration temperature should as well be kept higher to get better air cleaning effect in the premise that thermal comfort indoor is ensured.The strategy to choose desiccant cooling equipment to get better air cleaning effect is offered at the end. Two kinds of desiccant cooling system which can take full advantage of the rotor’s air cleaning effect are recommended, and the energy consumption of them is compared with traditional refrigeration air conditioning systems. It is found by calculation that the energy consumption based on heat of the desiccant cooling systems is lower than that of refrigeration air conditioning systems. When the fresh air rate of desiccant cooling systems is lowered to 25% of the original rate, the energy consumption of the two desiccant cooling systems reduced to 74% and 65% of the origin, while they can offer better air quality than the refrigeration system. But the two desiccant cooling systems consume more energy based on electricity than the refrigeration system.更多还原