基于电极再生溶液吸收剂的空调系统初步研究

发布时间：2018-10-23 12:48

【摘要】：能源问题已受到全世界的广泛关注,建筑节能是重要一环,空调系统节能是其中最直接有效的方式。与传统蒸汽压缩式空调相比,吸收式空调系统中的溶液除湿空调系统以其温湿度独立控制及节能环保的优点引起了广泛关注。然而,由于环境依赖性和不连续性的缺点,传统的热再生方式难以满足稳定性的需求。对此,本文提出了基于电容去离子再生的溶液除湿空调系统,以光伏发电驱动,通过电极再生溶液吸收剂,并进行了理论与实验研究。在理论研究部分,建立了基于电容去离子再生的溶液除湿空调系统,构建了系统的循环流程并研究了再生系统的循环特性,并建立了系统的热力学模型。对离子的传导过程进行了模拟,得到了溶液在停滞扩散层和电极区域的浓度场和电势场.,通过电容去离子溶液出口浓度的动态模型研究了去离子过程各影响因素。对系统的性能进行了研究,分析了能量回收率、溶液入口浓度和电压对系统COP的影响;对比了新系统与太阳能光热再生系统的耗能情况。在实验研究部分,搭建了电容去离子再生器实验装置,研究了不同溶液浓度下再生器再生效果及其对应的耗电情况,对比了两种流量下不同溶液浓度再生器的再生效果。研究结果表明,新系统可以克服热再生过程的不稳定性,提高可再生能源的利用率,若不考虑光热光电转换率,其耗能比传统系统可减少一半以上,具有较好的应用潜力。实际电荷效率在低浓度范围内较高,通过采用膜电容去离子方法,能够克服溶液在高浓度范围内的低效率问题,进一步提高再生效果,使系统具有更好性能。
[Abstract]:Energy problem has been paid more and more attention all over the world. Building energy saving is an important part, and air conditioning system energy saving is the most direct and effective way. Compared with the traditional steam compression air conditioning system, the solution desiccant air conditioning system in the absorption air conditioning system has attracted wide attention due to its advantages of independent control of temperature and humidity and energy saving and environmental protection. However, due to the shortcomings of environmental dependence and discontinuity, the traditional thermal regeneration method is difficult to meet the need of stability. In this paper, a solution desiccant air conditioning system based on capacitive deionization is proposed, which is driven by photovoltaic power generation and regenerates the solution absorbent by electrode, and the theoretical and experimental research is carried out. In the theoretical research part, a solution desiccant air conditioning system based on capacitive deionization is established, the cycle flow of the system is constructed, the cycle characteristics of the regeneration system are studied, and the thermodynamic model of the system is established. The ionic conduction process was simulated and the concentration field and potential field of the solution in the stagnant diffusion layer and electrode region were obtained. The influence factors of the deionization process were studied by using the dynamic model of the outlet concentration of the capacitive deionized solution. The effects of energy recovery, solution inlet concentration and voltage on the COP of the system were studied, and the energy consumption of the new system and the solar photothermal regeneration system were compared. In the part of experimental research, the experimental equipment of capacitive deionizer is built, the regeneration effect and the corresponding electricity consumption of regenerator under different solution concentration are studied, and the regeneration effect of regenerator with different solution concentration under two kinds of flow rate is compared. The results show that the new system can overcome the instability of the thermal regeneration process and improve the utilization of renewable energy. If the photothermal photoelectric conversion rate is not taken into account, the energy consumption of the new system can be reduced by more than half compared with the traditional system, which has a better application potential. The actual charge efficiency is higher in the low concentration range. By using the method of membrane capacitance deionization, the low efficiency problem of the solution in the high concentration range can be overcome, the regeneration effect can be further improved, and the system will have better performance.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB657.2

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