光伏协同强化传质下太阳能吸附制冷循环特性研究

The project is proposing a adsorption refrigeration system with the PV collaborative strengthening mass transfer.The solar adsorption syetem uses the PV to drive refrigeration piping systems,to strengthen refrigerant transport and cycle, to short the desorption cycles and improve the desorption rate effectively, then the overall efficiency of adsorption refrigeration system would be enhanced. Depth fundamental research would be done for the characteristics of absorption refrigeration cycle with PV collaborative strengtening mass tranfer.The syetem would be experimental and theoretical studies ,the impact to solar adsorption refrigeration system performance with finned tube would be analyzed profoundly,due to adding the PV collaborative strengthening mass transfer system in it. The collaborative work mechanism would be analyzed,which involves the solar enengy supply,enhanced mass transfer piping syetems and adsorptiong cooling.To achieve the key progress for improving the performance of solar adsorption refrigeration with PV collaborative strengthening mass transfer.In addition, The exploratory researchs would been done on the double adsorption beds system based on the research results of single bed adsorption and the results would provide reference for the adsorption refrigeration technology with double adsorption beds.

本项目提出一种基于光伏协同强化传质的太阳能吸附式制冷系统，即系统利用太阳电池驱动太阳能吸附制冷中的管路系统，强化工质输运，缩短系统解吸周期，有效提高太阳吸附制冷系统的解吸速率，提升了系统制冷总效率。项目针对光伏协同强化传质作用下吸附式制冷循环特性进行深入的基础研究；对系统进行了实验和理论研究，深入剖析了引入光伏协同强化传质系统对翅片管强化传热的太阳能吸附制冷系统制冷性能的影响；分析了太阳电池供能--管路系统传质强化--吸附式制冷的协同工作机制，实现有光伏协同强化传质下吸附制冷系统制冷性能的关键实质性进展。

项目在传统固体吸附制冷循环基础上，提出用光伏自适应驱动方式强化制冷剂传输，解决传统吸附制冷中解吸不畅、反吸、解吸速率慢和解吸量少等问题。围绕太阳能光伏协同强化传质吸附制冷系统循环特性进行了深入的基础研究，以实现太阳能吸附制冷高效循环为目标，综合考虑光伏、光热、制冷机能量的有效匹配，以提高太阳能综合利用率和实现高效制冷为目的。主要开展了光伏协同强化传质作用下太阳能吸附制冷循环特性研究。对系统进行了实验和理论研究，研究了翅片管式吸附床强化传热特性，温度分布均匀性，升温速率等方面的特征，获得了翅片管式吸附床的二维传热模型，及优化方案。在强化传热基础上优化了翅片式吸附床结构，深入研究了吸附床温度、压力变化对甲醇-活性炭工质对解吸特性的影响，发现了温度和压力对解吸量影响的相互耦合关系。以此依据搭建了强化传质降压解吸的太阳能吸附制冷系统，对比研究了自然传质与强化传质作用下系统的解吸性能，发现在各种工况下强化传质解吸量和系统COP均高于自然传质情况下，并对光伏协同强化传质的3种实施模式进行了对比研究，发现采用单泵双冷凝器实施模式效率最高，能获得最优解吸效果。研究所获得的成果能促进太阳能吸附制冷的商业化应用。