太阳能化学吸附式制冷系统仿真

发布时间：2018-07-04 23:11

  本文选题：吸附式制冷 + 化学吸附　； 参考：《青岛科技大学》2014年硕士论文

【摘要】：吸附式制冷采用环境友好型吸附剂，可有效利用低品位热源，在环保节能方面有着传统压缩式制冷所不能拥有的优势，因此受到广泛的重视。然而吸附式制冷要实现实际应用还存在着不少问题，工质对化学反应需要花费大量的时间，使得整个系统循环周期较长，，这是吸附式制冷没有得到广泛应用的主要原因。如何提高制冷系统的制冷效率是当今吸附式制冷研究中的重点内容。 本文中的吸附式制冷系统系统为以太阳能为主要能量来源，制冷剂为氨，吸附剂采用氯化钙。为了研究影响系统制冷效率的因素，本文使用Matlab/Simulink软件对吸附制冷系统进行了仿真。本文的主要工作和成果如下： （1）在分析基本吸附制冷循环的基础上，建立了吸附制冷热力过程中的计算表达式.采用Matlab/Simulink模拟手段对氯化钙-氨制冷工况对制冷性能的影响进行了热力计算及分析.本文研究了不同解吸终了温度、蒸发温度、冷凝温度、吸附终了温度对系统COP的影响。经过分析发现，解吸终了温度在90℃附近时系统COP达到最大值，提高蒸发温度，降低冷凝温度和吸附终了温度有利于系统COP的提高。 （2）设计了一个太阳能连续吸附式制冷系统，包括氨蒸发器、氨冷凝器及两个吸附床，采用Matlab/Simulink对系统进行模块化仿真。通过仿真结果，得到了吸附床温度的变化规律，分析了热水箱容积、冷凝温度、蒸发温度、循环时间对制冷效率的影响，为以后的实验研究提供理论依据。
[Abstract]:Adsorption refrigeration adopts environment-friendly adsorbent, which can effectively utilize low-grade heat source. It has the advantage of traditional compression refrigeration in environmental protection and energy saving, so it has been paid more and more attention. However, there are still many problems in the practical application of adsorption refrigeration. It takes a lot of time for the chemical reaction and the cycle period of the whole system is longer, which is the main reason why adsorption refrigeration has not been widely used. How to improve the refrigeration efficiency of refrigeration system is the focus of adsorption refrigeration research. In this paper, the adsorption refrigeration system is composed of solar energy as the main energy source, ammonia as the refrigerant and calcium chloride as the adsorbent. In order to study the factors affecting the refrigeration efficiency of the system, the adsorption refrigeration system is simulated by Matlab / Simulink software. The main work and achievements of this paper are as follows: (1) based on the analysis of the basic adsorption refrigeration cycle, the computational expressions of the adsorption refrigeration thermodynamic process are established. The thermodynamic calculation and analysis of the effect of calcium chloride and ammonia refrigeration on the refrigeration performance were carried out by Matlab / Simulink method. The effects of desorption temperature, evaporation temperature, condensation temperature and adsorption end temperature on the cop of the system are studied in this paper. After analysis, it was found that the cop of the system reached the maximum when the desorption temperature was about 90 鈩

本文编号：2097859