微波加热除湿技术的研究及在蒸发冷却空调中的应用

发布时间：2018-04-18 17:43

本文选题：微波加热 + COMSOL　；参考：《哈尔滨工业大学》2014年硕士论文

【摘要】：随着人们生活质量的改善及工业发展的进步，除湿技术显得愈发重要，但是传统的除湿方法耗能严重。不同的研究报道，工业干燥所消耗的能源资源占美国、法国、加拿大及英国总能耗的10%~15%，占丹麦及德国能源总量的20%~25%。为了在除湿的同时节约能源资源，就很有必要对除湿技术进行研究。在本文中，提出了微波加热除湿的基本原理，结合微波加热的特点，分析了微波加热和传统加热的不同。利用集中参数法分析了微波加热除湿及电加热除湿装置内湿空气（再生空气）及干燥剂的传热传质过程，其建立一维的数学模型。以COMSOL Multiphysics软件为模拟工具，在一定条件下，对微波加热除湿装置及电加热除湿装置内再生过程进行了模拟分析，得到了120s内任一时刻微元通道中各点空气温度、含湿量，干燥剂温度、吸附率等的变化曲线；通过改变微波功率，得到了一定范围内微波加热功率和干燥剂吸附率平均值的关系曲线；比较了120s时刻干燥剂吸附率平均值相等时两装置的耗电量，得到了微波加热除湿装置相对电加热除湿装置的节能率。通过改变装置入口再生空气的相对湿度，得到了两装置内吸附剂除湿率与入口再生空气相对湿度的关系曲线，得出了微波加热除湿装置相对电加热除湿装置优势最大时的入口再生空气相对湿度。通过改变干燥剂的厚度，经模拟分析，得出了再生过程中干燥剂内水分减少量、吸附率与干燥剂厚度的关系曲线，指出了干燥剂厚度的取值范围。通过对微波加热除湿装置前后均加设波导管使原除湿装置得到改进，经模拟分析，得到了改进后装置相对改进前装置的优缺点。分析了微波加热除湿装置在蒸发冷却空调中应用的可能，，并提出了除湿单元的合理除湿持续时间。通过本课题的模拟分析，可以为开发应用微波加热除湿装置提供参考意见与借鉴。
[Abstract]:With the improvement of people's quality of life and the development of industry, dehumidification technology becomes more and more important, but the traditional dehumidification method consumes energy seriously.According to different studies, industrial drying consumes 10 and 15 percent of the total energy consumption in the United States, France, Canada and the United Kingdom, and 20, 25 percent of the total energy consumption in Denmark and Germany.In order to save energy resources while dehumidifying, it is necessary to study dehumidification technology.In this paper, the basic principle of microwave heating dehumidification is put forward, and the difference between microwave heating and traditional heating is analyzed according to the characteristics of microwave heating.The heat and mass transfer processes of wet air (regenerated air) and desiccant in microwave heating dehumidifier and electric heating dehumidifier were analyzed by means of lumped parameter method. The one-dimensional mathematical model was established.Under certain conditions, the regeneration process of microwave heating dehumidifier and electric heating dehumidifier was simulated and analyzed with COMSOL Multiphysics software as simulation tool. The air temperature and moisture content of each point in the micro-element channel at any time in 120s were obtained.By changing microwave power, the relationship curve between microwave heating power and average adsorption rate of desiccant was obtained.The energy consumption of the two desiccant units was compared when the average adsorption rate of the desiccant was equal at 120s, and the energy saving rate of the microwave heating dehumidifier relative to the electric heating dehumidifier was obtained.By changing the relative humidity of the regenerated air at the inlet of the device, the curve of the relationship between the desiccant desiccant rate and the relative humidity of the inlet regenerated air is obtained.The relative humidity of inlet regenerated air is obtained when microwave heating dehumidifier has the greatest advantage over electric heating dehumidifier.By changing the thickness of the desiccant, the curves of the decrease of moisture content in the desiccant, the adsorption rate and the thickness of the desiccant are obtained by simulation and analysis, and the range of the thickness of the desiccant is pointed out.The original dehumidification device was improved by adding waveguide tube before and after microwave heating and dehumidifying device. The advantages and disadvantages of the improved device were obtained by simulation and analysis.The possibility of application of microwave heating dehumidifier in evaporative cooling air conditioning is analyzed, and the reasonable dehumidification duration of dehumidification unit is put forward.Through the simulation and analysis of this subject, it can provide reference for the development and application of microwave heating dehumidification device.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM924.76;TB657.2

【参考文献】