转轮除湿系统的改进和节能设计
发布时间：2018-11-05 19:36
【摘要】：空调除湿设备的耗能在总能源需求中占有很大比例,在建筑耗能中更是如此,转轮除湿系统结合了干燥剂除湿和冷却除湿方式,综合两者的优势,能达到很好的效果,传统转轮除湿系统通过电加热将空气加热完成再生过程,需要消耗大量电能。本文通过转轮吸湿材料的重新选择和热力循环过程的设计降低转轮系统的能耗,充分利用低品位能源,以达到节能的目的。本文首先讨论了传统转轮除湿系统所存在的问题,并针对性提出解决方案——低温再生转轮除湿系统,通过转轮的改进和冷凝热的回收来实现节能,然后对标准设计工况下的耗能进行计算,结果显示,夏季工况下低温再生转轮除湿系统比传统系统节能26%。在系统设计的基础上,通过吸湿剂的传热传质过程分析,与冷却设备模型相结合建立转轮除湿系统模型,从结果中可以看出,入口温湿度会导致送风湿度的增加,而再生温度增加会导致送风湿度的降低;再生温度的影响要大于入口状态的影响;转轮转速和风速的降低都能提高系统除湿能力,但在实际使用中要综合其他因素选择适当的参数。根据以上的设计,搭建实验台,对影响系统性能的几个重要参数的变化,综合评价了系统的性能;实验结果表明,轮前温度对系统平衡时间都有影响,但再生温度影响更大;处理温度的提高对除湿量和DCOP皆有不利影响;再生温度和再生风量的增加使系统的吸湿性能提高,DCOP值则是先提高后降低。低温再生转轮除湿系统的冷凝除湿量比例较大,依然有改进的可能,本文提出了两级转轮除湿系统,在达到相同的除湿效果的情况下,降低了冷凝除湿量,耗能也降低了14.4%。但系统的复杂度有所提高。
[Abstract]:The energy consumption of air conditioning dehumidification equipment accounts for a large proportion of the total energy demand, especially in building energy consumption. The rotary dehumidification system combines desiccant dehumidification with cooling dehumidification, which combines the advantages of both, and can achieve very good results. The traditional rotary dehumidification system uses electric heating to heat the air to complete the regeneration process, which consumes a lot of electric energy. In this paper, the energy consumption of the runner system is reduced by the re-selection of the humidity-absorbing material of the runner and the design of the thermodynamic cycle process, and the low grade energy is fully utilized to achieve the purpose of energy saving. This paper first discusses the problems existing in the traditional rotary dehumidification system, and puts forward a solution, that is, the low-temperature regenerative rotary dehumidification system, which can save energy through the improvement of the runner and the recovery of condensate heat. Then the energy consumption under the standard design condition is calculated. The results show that the low temperature regenerative runner dehumidification system is more energy efficient than the traditional system in summer. On the basis of the system design, through the analysis of the heat and mass transfer process of the moisture absorbent, the model of the rotary dehumidification system is established in combination with the cooling equipment model. It can be seen from the results that the inlet temperature and humidity will lead to the increase of the air supply humidity. However, the increase of regeneration temperature will lead to the decrease of air humidity. The influence of regeneration temperature is greater than that of inlet state, and the decrease of speed and wind speed of runner can improve the dehumidification ability of the system, but other factors should be integrated to select appropriate parameters in practical use. According to the above design, the experiment bench is built to evaluate the performance of the system for several important parameters affecting the performance of the system, and the experimental results show that the temperature in front of the wheel has an effect on the equilibrium time of the system, but the temperature of regeneration has a greater effect on the performance of the system. The increase of treatment temperature had adverse effect on the dehumidification amount and DCOP, and the increase of regeneration temperature and regenerated air rate increased the hygroscopicity of the system, while the DCOP value increased first and then decreased. The ratio of condensation dehumidification to dehumidification in low-temperature regenerative runner dehumidification system is large, and there is still possibility to improve it. In this paper, a two-stage runner dehumidification system is put forward, which can reduce the condensing dehumidification amount under the same dehumidification effect. Energy consumption was also reduced by 14. 4%. But the complexity of the system has been improved.
【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】：2014
【分类号】：TB657.2;TB4
本文编号：2313160
[Abstract]:The energy consumption of air conditioning dehumidification equipment accounts for a large proportion of the total energy demand, especially in building energy consumption. The rotary dehumidification system combines desiccant dehumidification with cooling dehumidification, which combines the advantages of both, and can achieve very good results. The traditional rotary dehumidification system uses electric heating to heat the air to complete the regeneration process, which consumes a lot of electric energy. In this paper, the energy consumption of the runner system is reduced by the re-selection of the humidity-absorbing material of the runner and the design of the thermodynamic cycle process, and the low grade energy is fully utilized to achieve the purpose of energy saving. This paper first discusses the problems existing in the traditional rotary dehumidification system, and puts forward a solution, that is, the low-temperature regenerative rotary dehumidification system, which can save energy through the improvement of the runner and the recovery of condensate heat. Then the energy consumption under the standard design condition is calculated. The results show that the low temperature regenerative runner dehumidification system is more energy efficient than the traditional system in summer. On the basis of the system design, through the analysis of the heat and mass transfer process of the moisture absorbent, the model of the rotary dehumidification system is established in combination with the cooling equipment model. It can be seen from the results that the inlet temperature and humidity will lead to the increase of the air supply humidity. However, the increase of regeneration temperature will lead to the decrease of air humidity. The influence of regeneration temperature is greater than that of inlet state, and the decrease of speed and wind speed of runner can improve the dehumidification ability of the system, but other factors should be integrated to select appropriate parameters in practical use. According to the above design, the experiment bench is built to evaluate the performance of the system for several important parameters affecting the performance of the system, and the experimental results show that the temperature in front of the wheel has an effect on the equilibrium time of the system, but the temperature of regeneration has a greater effect on the performance of the system. The increase of treatment temperature had adverse effect on the dehumidification amount and DCOP, and the increase of regeneration temperature and regenerated air rate increased the hygroscopicity of the system, while the DCOP value increased first and then decreased. The ratio of condensation dehumidification to dehumidification in low-temperature regenerative runner dehumidification system is large, and there is still possibility to improve it. In this paper, a two-stage runner dehumidification system is put forward, which can reduce the condensing dehumidification amount under the same dehumidification effect. Energy consumption was also reduced by 14. 4%. But the complexity of the system has been improved.
【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】：2014
【分类号】：TB657.2;TB4
【参考文献】
相关期刊论文 前1条
1 高立江,张欢,由世俊,孙文华,李晓东,王峰;冷冻—转轮除湿在实际工程中的应用[J];河北建筑科技学院学报;2004年03期
，本文编号：2313160
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