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Theoretical and experimental investigation of silica gel / water adsorption refrigeration systems

机译:硅胶/水吸附制冷系统的理论与实验研究

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摘要

This PhD project was set out to improve the performance of silica gel / water adsorption cooling systems using a number of investigation tools. A novel global lumped analytical simulation model has been constructed for a commercialised two-bed silica gel / water 450kW adsorption chiller. It was integrated with a genetic algorithm (GA) optimisation toolbox to determine the optimum operating conditions to obtain the optimum chiller performance. The model was used to investigate the effect of physical and operating on the chiller performance. The model was also used to investigate the effect of various adsorbent bed enhancement techniques that are presented in published literature. An experimental test facility has been designed, constructed and commissioned to study the performance of scaled down adsorbent bed modules. It has been constructed to understand the effect of the operating conditions on adsorbent-bed heat and mass transfer performance. A dynamic vapour sorption (DVS) gravimetric analyser has been used to characterise a new species of adsorbents (MOFs). These adsorbents have strong potential towards water sorption and could replace the currently applied silica gel. MOFs adsorbents have been characterised in terms of adsorption isotherms and kinetics, in addition to its cyclic analysis. It was found that HKUST-1 (copper based MOF) outperforms silica gel with 95.7% increase in the water uptake. Iron based MOF (MIL-100) was found to outperform silica gel for high evaporating temperature application.
机译:该博士项目的设立是为了使用多种研究工具来改善硅胶/水吸附冷却系统的性能。针对商业化的两床硅胶/水450kW吸附式冷却器,构建了一个新颖的全局集总分析模拟模型。它与遗传算法(GA)优化工具箱集成在一起,以确定最佳运行条件以获得最佳冷却器性能。该模型用于研究物理和运行对冷却器性能的影响。该模型还用于研究已发表文献中介绍的各种吸附剂床增强技术的效果。设计,建造和调试了一个实验测试设施,以研究按比例缩小的吸附剂床模块的性能。它被构造为了解操作条件对吸附剂床传热和传质性能的影响。动态蒸汽吸附(DVS)重量分析仪已用于表征新型吸附剂(MOF)。这些吸附剂具有很强的吸水潜力,可以代替目前使用的硅胶。 MOF吸附剂除进行循环分析外,还根据吸附等温线和动力学进行了表征。发现HKUST-1(铜基MOF)的性能优于硅胶​​,吸水率提高了95.7%。对于高蒸发温度应用,发现铁基MOF(MIL-100)的性能优于硅胶​​。

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  • 作者

    Rezk Ahmed Rezk Masoud;

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  • 年度 2012
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  • 原文格式 PDF
  • 正文语种 {"code":"en","name":"English","id":9}
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