基于高温热泵再生的转轮除湿空调机组的设计与性能研究

发布时间：2018-03-11 18:12

  本文选题：高温热泵　切入点：除湿转轮　出处：《天津大学》2014年博士论文　论文类型：学位论文

【摘要】：本文提出高温热泵转轮除湿空调系统，立足于硅胶转轮的净化及除湿作用，利用热泵的蒸发器对热空气降温冷却，使其达到送风温度；同时利用热泵的冷凝器释放的热量加热再生空气，使系统内部实现冷量和热量的相互抵消，实现空气温湿度独立处理，改善室内空气品质，达到系统节能的目的。 通过理论分析确定了空调系统供冬夏季使用的三种运行模式，并根据实验研究的数据，分别验证了单级系统和双级系统的可行性，最终确定采用单级系统进行实验，并依据设计流程制造高温热泵转轮除湿空调机组。 对自主研发的工质BY-3的性能进行了测试，验证了其高温特性，并采用BY-3作为工质，从硅胶转轮的除湿效果的角度，评价热泵和转轮的匹配性，得出转轮在再生温度为60~65℃之间时，绝热效率最高。随后，研究了高温热泵转轮除湿空调系统对于气候变化的适应性及性能。研究结果表明，当室外温度不超过36℃时，空调系统的送风温度满足20±1℃的要求，，该系统获得的再生温度满足除湿转轮的再生要求。转轮除湿效率较高，夏季工况平均除湿效率为32.7%。室外热湿环境和再生风量对热泵的性能影响较大，高温热泵的最大制热性能系数为2.76，最大制冷性能系数为2.26。 重点分析了动态运行的空调系统中除湿转轮的性能。结果表明，相比室外空气温度和再生风量与处理风量比率，室外空气含湿量和再生温度对评价指标（MRC、ηdeh、DCOP、SER）的影响更大，回归方程的拟合效果较好，平均相对误差和最大相对误差均在合理范围内。 对高温热泵转轮除湿空调系统进行了分析。结果表明，压缩机的热力完善度和效率均最低，需要对压缩机进行技术改造，或采用变频压缩机。高温热泵转轮除湿系统的效率为8.17%，比添加加热器的除湿转轮系统的效率提高近167%，说明利用高温热泵冷凝热作为再生热源可明显提高系统能源使用效率。 使用Visual Basic软件建立常规再热空调系统的数学模型，并对数学模型进行验证，将高温热泵转轮除湿空调系统与常规再热空调系统进行性能比较，标准工况下，高温热泵转轮除湿空调系统节能百分比为38.8%。通过对高温热泵转轮除湿系统节能趋势的分析，看出该系统在干热环境下比湿热环境下更具有节能潜力。
[Abstract]:In this paper, the desiccant air conditioning system of high temperature heat pump runner is put forward. Based on the purification and dehumidification function of silica gel runner, the heat pump evaporator is used to cool down the hot air and make it reach the air supply temperature. At the same time, the heat released from the condenser of heat pump is used to heat the regenerated air, which makes the cooling and heat cancel each other in the system, realizes the independent treatment of air temperature and humidity, improves the indoor air quality, and achieves the purpose of energy saving in the system. Through theoretical analysis, three operation modes of air conditioning system for winter and summer are determined. According to the experimental data, the feasibility of single stage system and two stage system are verified, and the single stage system is finally adopted to carry out the experiment. And according to the design process manufacturing high-temperature heat pump runner dehumidification air-conditioning unit. The performance of self-developed working fluid BY-3 is tested and its high temperature characteristic is verified. The matching of heat pump and runner is evaluated by using BY-3 as working medium from the angle of dehumidification effect of silica gel runner. The highest adiabatic efficiency of the runner is obtained when the regeneration temperature is between 60 鈩

本文编号：1599320