【作者】 唐家伟；

【导师】 郑丹星；

【作者基本信息】 北京化工大学 ， 化学工程， 2007， 硕士

【摘要】 传统的空调制冷方式以消耗电能为主，随着制冷空调的普及应用，传统的制冷方法导致了目前令人们关注的两大问题：能源问题和环境问题。能源问题是由于传统的压缩式制冷空调消耗大量的电能，引起电能的紧张局势；环境问题是由于传统的氟利昂制冷剂工质造成的臭氧层破坏。液体除湿空调系统是一种环保节能的新型空调方式，液体除湿空调系统可以利用太阳能、工业余热等低品位热源作为再生热源，该系统中没有氟利昂制冷工质，对环境没有污染，能够有效地缓解空调应用引起的能源和环境问题。本文介绍了液体除湿技术的研究背景和发展现状，从液体除湿技术的基本原理出发，利用实验室现有条件，建立了液体除湿和再生实验台。进行了以氯化锂水溶液为除湿溶液的绝热填料塔除湿过程实验，考察气液各进口参数对各出口参数值的影响。空气入口温度对除湿影响最小，除湿效果与溶液温度、浓度、流量和空气流量、湿度关系密切。进行了氯化锂溶液立管降膜再生过程实验研究，在可选择的实验参数范围内，通过实验考察了空气和氯化锂溶液各进口参数变化对再生效果的影响。空气温度、流量和溶液流量对再生脱水量影响很小，随溶液温度、浓度和空气流量变化明显。分别建立了填料塔除湿和立管降膜再生模型，模拟结果与实验结果趋势一致，通过实验值与模型计算值比较，模型计算值与实验值偏差在20％内。可以利用模型考查各因素对除湿和再生的影响，指导实验和设计。除湿和再生对各参数的依赖性不尽相同。除湿量对溶液的入口浓度、温度、流量，空气的入口湿度具有较强的依赖性，而空气的流量和温度对其影响较小。由于再生降膜管径较小，液气比偏高，空气出口状态与入口状态关系不大，随着空气流量增大，再生器脱水量线性增加，随湿度和温度变化不明显；再生器脱水量与空气流量，溶液温度和浓度关系密切，脱水量随流量缓慢增大。更多还原

【Abstract】 The traditional compression refrigeration systems consume plenty of electrical energy. With the development and widely application of the technology of refrigeration and air conditioning, the traditional way of refrigeration has resulted in two severe problems concerned by people presently, which are the issues about energy and environment. The expense of plenty of electrical energy leads to the issue about energy. The issue about environment is provoked by the extensive use of traditional refrigerant-Freon. Liquid dehumidification was driven by low temperature heat resource like solar energy. What’s more, there is no Freon refrigerant in the new system and no pollution effect.This article introduced the background and developmental condition of the liquid dehumidification and expatiated on the theory of the dehumidification system. The liquid dehumidification facility was set up.This thesis observed the change of dehumidification in the different inlet condition. The result of the absorption was accorded with the predictions. Air flow rate, liquid temperature and concentration had a great affect on dehumidification; liquid flow rate, air temperature and humidity had less effect on dehumidification.The effect of each inlet condition on regeneration in tube falling-film was study in the article. The result of the absorption was accorded with the predictions. The mass of water evaporation was heavy influenced by the liquid temperature and concentration; the air condition had less effect on regeneration.The mathematic models were established according to the packed tower dehumidification and tube falling-film regeneration, which described heat transfer and mass transfer about the countercurrent flow in the dehumidifier and regenerator of the air conditioning system. The affect of all inlet condition on dehumidification and regeneration was study based the models. The result of the absorption was accorded with the predictions. Air humidity, liquid temperature and concentration had great affect on dehumidification; the mass of water evaporation was heavy influenced by the liquid temperature and concentration; other factor had less effect on dehumidification and regeneration.更多还原