油浴式太阳能固体吸附制冷循环性能研究
发布时间：2018-11-16 20:40
【摘要】：在多年的实验过程中,对于固体吸附式制冷的探究多数集中在系统制冷工质对材料的性能提升、系统中主要部件的优化等方面上。但是在系统的供能方式方面有很少的研究。大多都是在研究平板型翅片管式固体吸附制冷系统,该系统直接利用辐射的太阳能加热翅片管,为系统提供热能。也有少量在研究水浴式制冷装置,该装置利用集热器加热热水,再用热水来加热翅片管,没有直接利用光能而是将光能转化成热能再利用。针对这一情况,本文设计和搭建了一套基于太阳能热油供能的油浴式固体吸附制冷系统,不仅可以解决传统平板型翅片管式固体吸附制冷系统存在的问题,而且可以解决水浴固体吸附制冷系统存在的问题。从系统结构及性能优化等方面,本文开展了以下研究工作:1、从优化系统制冷性能的角度出发,通过理论计算,设计了一套由吸附床、蒸发器、保温油箱、冷凝器、储液瓶、冷却箱等组成的固体吸附制冷系统的研究装置,并完成了系统的搭建和运行调试。2、针对设计的翅片管型太阳能油浴式固体吸附制冷系统,将翅片管吸附床放置于保温油箱中,采用热油浴进行加热解/吸附,通过实验研究了吸附床在维持热源温度分别为110℃、115℃、120℃和125℃,维持解吸时间分别为4h、5h和6h时,系统的温度分布及特点。3、采用电能模拟太阳能加热作为驱动热源,在解吸阶段对放置于保温油箱内的吸附床进行加热,从而解吸翅片管吸附床内的制冷剂。研究了解吸温度和时间与该实验装置解吸量之间的相关性。研究表明,解吸温度对油浴式固体吸附制冷系统的性能影响较大,加热阶段较高的解吸温度有利于解吸制冷剂。延长解吸时间可以提高系统的制冰量和制冷量,但同时系统的解吸量逐渐减少并且系统散热量也随之增大,系统吸收的热量同样在逐渐增多,从而造成了系统的循环COP与热使用率下降。系统存在一个较佳的加热解吸时间5h,更长的解吸时间对系统制冷性影响不大。4、通过实验研究了冷凝温度分别为11℃,18℃和未控制冷凝温度状态下,太阳能固体吸附制冷系统在解吸温度为120℃并且解吸时间为5h时对系统的COP和SCE的影响。系统的制冷性能随着冷凝温度的降低而变好,冷凝温度为11℃和18℃时,系统的COP之间相差较小,但是在未控制冷凝温度状态下的COP较前两种相差较大。冷凝温度为18℃时循环COP比未控制冷凝温度时高出21.6%。本文所提出的太阳能油浴式固体吸附制冷系统,在保证稳定输出冷量的同时还可为用户提供一定温度的热水。主要研究了该系统的制冷率以及性能地提高问题。研究所得的结果对该制冷系统更深入的改良和研究提出了基本理论指导和实验参考。
[Abstract]:During many years of experiments, the research on solid adsorption refrigeration has focused on the improvement of the performance of the refrigerants and the optimization of the main components of the system. However, there is little research on the way of energy supply in the system. Most of them are studying the flat fin tube solid adsorption refrigeration system which directly uses solar energy to heat the fin tube to provide heat energy for the system. A small number of water bath refrigeration devices are also being studied. The device uses a collector to heat hot water, and then uses hot water to heat finned tubes. Instead of directly using light energy, it converts light energy into heat energy and reuses it. In view of this situation, this paper designs and builds an oil-bath solid adsorption refrigeration system based on solar energy supply of hot oil, which can not only solve the problems of traditional flat fin tube solid adsorption refrigeration system. And it can solve the problems of water bath solid adsorption refrigeration system. From the aspects of system structure and performance optimization, this paper has carried out the following research work: 1. From the point of view of optimizing the refrigeration performance of the system, a set of adsorption bed, evaporator, thermal insulation tank, condenser, liquid storage bottle is designed by theoretical calculation. The research device of solid adsorption refrigeration system composed of cooling box and so on, and completed the system construction and operation debugging. 2, aiming at the design of finned-tube solar oil bath solid adsorption refrigeration system, The finned tube adsorption bed was placed in the heat preservation tank, and the thermal oil bath was used to heat desorb / adsorption. The adsorption bed was maintained at 110 鈩，
本文编号：2336583
[Abstract]:During many years of experiments, the research on solid adsorption refrigeration has focused on the improvement of the performance of the refrigerants and the optimization of the main components of the system. However, there is little research on the way of energy supply in the system. Most of them are studying the flat fin tube solid adsorption refrigeration system which directly uses solar energy to heat the fin tube to provide heat energy for the system. A small number of water bath refrigeration devices are also being studied. The device uses a collector to heat hot water, and then uses hot water to heat finned tubes. Instead of directly using light energy, it converts light energy into heat energy and reuses it. In view of this situation, this paper designs and builds an oil-bath solid adsorption refrigeration system based on solar energy supply of hot oil, which can not only solve the problems of traditional flat fin tube solid adsorption refrigeration system. And it can solve the problems of water bath solid adsorption refrigeration system. From the aspects of system structure and performance optimization, this paper has carried out the following research work: 1. From the point of view of optimizing the refrigeration performance of the system, a set of adsorption bed, evaporator, thermal insulation tank, condenser, liquid storage bottle is designed by theoretical calculation. The research device of solid adsorption refrigeration system composed of cooling box and so on, and completed the system construction and operation debugging. 2, aiming at the design of finned-tube solar oil bath solid adsorption refrigeration system, The finned tube adsorption bed was placed in the heat preservation tank, and the thermal oil bath was used to heat desorb / adsorption. The adsorption bed was maintained at 110 鈩，
本文编号：2336583
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