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首页> 外文期刊>Energy Conversion & Management >Water sorption on silica- and zeolite-supported hygroscopic salts for cooling system applications
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Water sorption on silica- and zeolite-supported hygroscopic salts for cooling system applications

机译：二氧化硅和沸石负载的吸湿盐对水的吸附，用于冷却系统

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Silica gel and zeolite 13X were used as supports for the hygroscopic salts LiBr, MgCl_2 and CaCl_2. The silica-and zeolite-supported hygroscopic salts were characterized by N_2 adsorption at -196 ℃ and X-ray diffraction. The silica support was mesoporous whereas the zeolite support was microporous. The dispersion of CaCl_2 was much lower on the zeolite than on the silica support, and the microporosity of the zeolite was blocked by the salt. CaCl_2 supported on silica was a superior water sorbent versus zeolite, and CaCl2 supported on zeolite was an inferior sorbent versus zeolite. Complete water desorption from silica-supported hygroscopic salts can be effectively reached at a relatively low temperature (100-110 ℃), making them candidates for efficient cooling or air conditioning applications. The isosteric heat of water desorption was obtained from the isobars and was dependent on the amount of water adsorbed. Finally, the thermodynamic cooling cycle for the SCa33 (silica gel containing 33 wt.% CaCl_2) - water vapour pair showed a coefficient of performance of 0.83.
机译：硅胶和13X沸石用作吸湿盐LiBr，MgCl_2和CaCl_2的载体。二氧化硅和沸石负载的吸湿盐的特征是在-196℃下吸附N_2和X射线衍射。二氧化硅载体是中孔的，而沸石载体是微孔的。 CaCl_2在沸石上的分散性比在二氧化硅载体上的低得多，并且沸石的微孔被盐封闭。负载在二氧化硅上的CaCl_2是优于沸石的吸水剂，负载在沸石上的CaCl2是相对于沸石的劣质吸水剂。可以在相对较低的温度（100-110℃）下有效地从二氧化硅负载的吸湿盐中完全脱附水分，使其成为高效冷却或空调应用的候选者。从等压线获得水的解吸等排热，其取决于吸附的水量。最终，SCa33（含有33重量％CaCl 2的硅胶）-水蒸气对的热力学冷却循环显示出0.83的性能系数。

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