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Water Sorption Property and Cooling Performance Using Natural Mesoporous Siliceous Shale Impregnated with LiCl for Adsorption Heat Pump
Applied Thermal Engineering ( IF 6.1 ) Pub Date : 2020-03-26 , DOI: 10.1016/j.applthermaleng.2020.115241
Junya Togawa , Asami Kurokawa , Katsunori Nagano

The composite adsorbent of natural mesoporous powder of Wakkanai siliceous shale (WSS) impregnated with LiCl has been investigated. In this study, the slurry of WSS–LiCl with acryl resin as a binder was prepared for fabricating an adsorbent-filled heat exchanger (HEX). The optimal LiCl content for the impregnation with WSS was 20 wt%, which was chosen from the relation between water uptake and pore volume. The theoretical sorption amounts were estimated from various sorption isotherms, and the value was 0.34 g/g at the temperature conditions of 80 °C (regeneration), 30 °C (condensation and adsorption), and 15 °C (evaporation). From the analysis of sorption heat, it was found that water adsorption and desorption occurred repeatedly at the lower region of 45–50 kJ/mol at the driving conditions for the adsorption heat pump. To evaluate the coefficient of cooling performance (COP) and a specific cooling power (SCP), the adsorbent-filled HEX was prepared using a small-sized corrugated-fin-type aluminum HEX and the slurry. The COP and SCP were 0.41 and 498 W/kg at 80 °C of regeneration, respectively.



中文翻译:

吸附热泵用浸渗LiCl的天然中孔硅质页岩的吸水性能和冷却性能

研究了浸渍有LiCl的稚内硅质页岩(WSS)天然中孔粉末的复合吸附剂。在本研究中,制备了以丙烯酸树脂为粘合剂的WSS-LiCl浆料,以制造填充有吸附剂的热交换器(HEX)。WSS浸渍的最佳LiCl含量为20 wt%,这是从吸水率和孔体积之间的关系中选择的。根据各种吸附等温线估算理论吸附量,在80°C(再生),30°C(冷凝和吸附)和15°C(蒸发)的温度条件下,该值为0.34 g / g。通过对吸附热的分析,发现在吸附热泵的驱动条件下,水的吸附和解吸在45-50 kJ / mol的较低区域反复发生。为了评估冷却性能系数(COP)和比冷却功率(SCP),使用小型波纹翅片型铝HEX和浆料制备了填充有吸附剂的HEX。在80°C的再生温度下,COP和SCP分别为0.41和498 W / kg。

更新日期:2020-03-27
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