【作者】 苏鹏；

【导师】 喻李葵；

【作者基本信息】 中南大学 ， 制冷及低温工程， 2010， 硕士

【摘要】 转轮除湿空调系统是环境友好空调代表之一,它利用除湿转轮的吸附式除湿,独立处理系统的湿负荷,将空调系统温湿处理解耦,不但提高冷却设备蒸发温度而且保持连续送出低温度、低露点的空气。对于转轮除湿空调系统而言,除湿转轮是一个十分重要的组成部件,其除湿效果和再生能耗直接影响着系统的品质优劣。本文通过对不同固体除湿剂热物性质的比较,选定细孔硅胶为转轮除湿剂,基于波浪形微通道内传热传质理论对物理模型提出了假设,依据能量守恒和质量守恒定律推导了描叙微通道内部传热传质的控制方程,利用麦考马克时间推进显式法对方程进行了离散,运用MATLAB软件编译了计算程序。本文通过数值模拟研究了运行参数和结构参数对除湿性能的影响。结果表明,转轮出口含湿量随进口空气状态参数变化呈单调性,转轮在低温高湿中的除湿效果更加好,高温低湿的再生空气能使除湿剂的脱附更加完全,进而提高其除湿量。而转速、再生区与除湿区面积比率以及轮厚都为可优参数,它们在变化过程中存在一个最优值,使得处理空气的出口含湿量达到最低。同时,对于再生区与除湿区面积比率对性能指标MRC以及处理空气进口温湿度对性能指标DCOP的影响,本文给出了结论。本文以长沙某工人俱乐部一楼健身室为建筑模型,研究了在该地区夏季高热高湿气候状况下转轮空调的能耗状况,并计算了相同运行工况下冷却除湿空调系统的能量消耗。在对两者进行比较之后发现,转轮除湿一次回风空调系统的能耗比冷却除湿空调系统仅少3.6%,而通过对循环模式的改进,增加了室内排风与新风间热焓交换器的转轮除湿二次回风空调系统比改进前节能8.1%,而以排风为再生空气的转轮除湿二次回风系统比改进前节能23.2%。同时对四种系统除湿过程进行了(?)分析,发现在除湿过程中除湿转轮对能量的利用要优于表面冷却器。更多还原

【Abstract】 Rotary dehumidification air-conditioning system is one of those which are friendly to environment. The rotor moves away the vapor with the adsorption of the desiccant inside it, which releases the coupling of the system’s sensible heat load and latent heat load. Because of the processing of the rotor, the process air is treated to such a status with low temperature and low dew-point and the evaporating temperature of the chilling equipment is enhanced. The rotor plays a very important part in the rotary dehumidification air-conditioning system, whose dehumidifying efficiency makes an great affect to the system performance.After the comparisons of the heat properties of several different solid desiccants, the Kiselgel A was selected as the desiccant of the system. A series of assumptions were made based on the heat and mass transfer theory inside the sinusoidal micro channel. The governing equations which describe the process of heat and mass transfer were derived observing the law of energy and mass conservation and discretized by the MacCormack explicit finite difference method. The computation program was compiled simulate air handling process.The affection of operating parameters and structure parameters to the dehumidification was studied. It shows that the outlet humidity is monotonic as a function of the parameters of the air status while there is an optimised value of rotation speed、the area ratio of regeneration to dehumidification and width of rotor to make the dehumidification amount the greatest.Meanwhile, the influence of the area ratio of regeneration to dehumidification to the MRC and inlet process air temperature and humidity to the DCOP is investigated.According to the weather condition of the Changsha city, the energy consumption of the rotary dehumidification air-conditioning system and the normal cooling dehumidification air-conditioning system was calculated. The result reveals that the energy the former expended is 3.6% less than the latter.But after some improvement of rotary dehumidification system, two better rotary dehumidification systems were studied. Comparing to the initial rotary dehumidification system under the same working condition,the energy they saved is about 8.1% and 23.2% respectively. After the exergy analysis, it is asured that the rotor has a higher rate of energy applying than the chiller does.更多还原