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Advanced cooling heat pump and desalination employing functional UiO-66 (Zr) metal-organic frameworks

机译：高级冷却热泵和脱盐采用功能性UIO-66（ZR）金属有机框架

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This article presents a comprehensive study of UiO-66 (Zr) based metal-organic frameworks (MOFs) plus water systems for various adsorption assisted heat transformation (AAHT) applications such as cooling, heat pump and desalination. The paper at first deals with the evaluation of water adsorption characteristics on the parent and pyridine, amino, and hydroxyl functional groups based UiO-66 (Zr) MOFs. The experiments are carried on for temperatures varying from 25 to 80 degrees C and pressures up to the saturated conditions. Based on experimentally confirmed isotherms and kinetics data, the adsorption assisted heat transformation systems are modelled and simulated. Hence the thermal storage system is also modelled with the addition of both heat and mass recoveries. Finally, the performances of adsorption cooling/heat pump/desalination are calculated with respect to various cycle time, heating source and cooling load temperatures. Hence, hydroxyl (-OH) and amino (-NH2) functional group UiO-66 MOFs improves water transfer from 0.05 kg/kg to 0.32 kg/kg. On the other hand, OH-UiO-66 (Zr) + water system shows the faster kinetics and -NH2 group also provides relatively higher Delta q (uptake-offtake difference) per adsorption-desorption cycle. The functional groups enhance the hydrophilic behavior of the parent UiO-66 MOFs in the low pressure zone, which improves overall efficiency. The SCP (specific cooling power) enhances from to 0.36 kW/kg to 0.84 kW/kg and the SHP (specific heating power) increases from 0.9 kW/kg to 1.48 kW/kg. In addition, the SDWP (specific daily water production) improves from 24 to 40 m(3) of purified water per tonne of MOFs-adsorbent per day. These results confirm that functionalized UiO-66 (Zr) MOFs are competent candidates for adsorption cooling, heat pump and desalination applications.
机译：本文介绍了对基于UIO-66（ZR）的金属有机框架（MOF）加上水系统的综合研究，用于各种吸附辅助热变换（AAHT）应用，例如冷却，热泵和海水淡化。本文首先涉及母体和吡啶，氨基和羟基官能团的水吸附特性的评价基于UIO-66（Zr）MOF。对实验进行，用于温度，温度从25至80℃变化，并压力直至饱和条件。基于实验证实的等温线和动力学数据，建模和模拟吸附辅助传热系统。因此，热存储系统也通过添加热量和质量回收来建模。最后，相对于各种循环时间，加热源和冷却负荷温度计算吸附冷却/热泵/脱盐的性能。因此，羟基（-OH）和氨基（-NH2）官能团UIO-66MOF将水转移改善为0.05kg / kg至0.32kg / kg。另一方面，OH-UIO-66（ZR）+水系统显示了更快的动力学，-NH2组也提供了每个吸附解吸循环的相对较高的Delta Q（摄取效差）。官能团增强母体UIO-66 MOF在低压区中的亲水性能，从而提高了整体效率。 SCP（特定冷却功率）增强至0.36kW / kg至0.84 kW / kg，SHP（比加热功率）从0.9kW / kg增加到1.48 kW / kg。此外，SDWP（特定日常水产）每天每吨MOF吸附剂的24至40米（3）次纯化水。这些结果证实，功能化的UIO-66（ZR）MOF是吸附冷却，热泵和海水淡化应用的称职候选者。

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