内热型除湿溶液再生器溶液再生方式及装置性能分析

发布时间：2018-05-26 02:19

本文选题：模型 + 再生器　；参考：《农业工程学报》2017年18期

【摘要】：内热型再生器作为一种高效溶液再生装置其性能主要由溶液加热形式、热水流向、传热单元数及溶液空气相对流向等决定。该文基于装置内溶液、空气、热水三者间的能量和质量守恒,分别建立预热、内热再生器在2种热水流向下的顺流、逆流、叉流的数学模型,并进行理论性能模拟和比较。数值模拟发现大部分工况下内热型再生器再生性能为预热型的2~4倍,且受溶液空气流量比和热水空气流量比影响较大。热水与溶液流向相反时的再生性能要优于相同时,最大可高于5%。再生性能随溶液空气传热单元数和溶液热水传热单元数的增大而提高,且存在性能增长最快的组合曲线。另外再生过程中大部分情况下溶液和空气呈顺流时的出入口浓度差最大,叉流为其0.97倍左右,逆流最低时仅达到其0.87倍左右。该文研究结果为内热型溶液再生器设计优化提供理论依据。
[Abstract]:The performance of the internal heat regenerator as a high efficiency solution regeneration device is mainly determined by the heating form of solution, the flow direction of hot water, the number of heat transfer units and the relative flow direction of air in the solution. Based on the conservation of energy and mass among solution, air and hot water in the device, the mathematical models of downstream, countercurrent and cross flow of preheating and internal heat regenerator under two kinds of hot water flow are established, and the theoretical performance is simulated and compared. Numerical simulation shows that the regenerative energy of the inner thermal regenerator is 4 times of that of the preheated regenerator under most working conditions and is greatly affected by the air flow ratio of solution to air and the air flow ratio of hot water to water. When the flow of hot water and solution is opposite, the regeneration performance of hot water is better than that of the same solution, and the maximum is higher than 5%. The regenerative energy increases with the increase of the number of air heat transfer units in the solution and the heat transfer units in the hot water of the solution, and there is a combination curve with the fastest performance growth. In addition, in most cases, the difference of inlet and outlet concentration between solution and air is the largest, the cross current is about 0.97 times, and the countercurrent is only about 0.87 times. The results provide a theoretical basis for the design optimization of the internal heat type solution regenerator.
【作者单位】：南昌大学建筑工程学院;
【基金】：国家自然科学基金项目(51766010) 江西省研究生创新专项资金项目(YC2017-S012)
【分类号】：TU831.4

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