| 摘要: |
| 为同步增强活性炭-甲醇吸附制冷系统的热质传递能效，在压块活性炭制备工艺中引入了炭素前驱体原位CaCl2浸渍嵌合与石墨烯复配过程，制备了中、微孔同步发达的新型炭材料CA-GC及石墨烯复配炭SC-GC；并对其吸附/解吸特性、导热系数及制冷特性进行了对比研究。结果表明：CaCl2浸渍嵌合显著提升了炭表面及炭骨架内部的钙氧化物吸附点位丰度（灰分达到19.38%），从而显著提升了CA-GC的Sokoda & Suzuki平衡吸附量（533.38±6.97 mg/g）和导热系数（1.058±0.77 W/(m?K) ）。石墨烯的复配过程进一步强化了复合炭材料SC-GC的导热系数（2.61±0.15 W/(m?K)）和平衡吸附量（712.84±30.66 mg/g）。当解吸温度为100 ℃，循环时间60 min时，基于SC-GC构建的吸附制冷床连续制冷循环脱附量、制冷量和制冷功率分别达到533.10±14.17 mg/g、486.95±9.79 kJ/kg和973.86±15.28 kJ/(kg?h)。 |
| 关键词: 吸附制冷 活性炭 甲醇 导热系数 制冷功率 |
| DOI： |
| 投稿时间：2022-03-21 修订日期：2022-04-28
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| 基金项目:国家自然科学基金( 51708162) ，2020年度黑龙江省省属高等学校基本科研业务费科研项目（哈尔滨商业大学青年学术骨干支持计划）（2020CX06）资助。 |
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| Effects of CaCl2 Impregnation and Graphene Blending on Adsorption Refrigeration with Activated Carbon-Methanol Working Pair |
|
Gong Xujin, Wang Junzhu, Dong Yuqi
|
| (School of Energy and Civil Engineering, Harbin University of Commerce) |
| Abstract: |
| In-situ CaCl2 impregnation/chimerization of carbon precursors and graphene blending were introduced into the preparation process of agglomerated activated carbon to simultaneously enhance the heat and mass transfer efficiency of the activated carbon-methanol adsorption refrigeration system. Two types of innovative carbons—CA-GC and SC-GC—were prepared in this study, with synchronously developed meso-pores and micro-pores. This study includes a comparative study of the adsorption/desorption characteristics, thermal conductivity, and refrigeration characteristics of the new carbon-methanol working pair. In-situ CaCl2 impregnation/chimerization resulted in significant improvement in terms of the abundance of calcium oxide adsorption sites on the carbon surface and inside the carbon framework (ash content reached 19.38%). The Sokoda & Suzuki equilibrium adsorption capacity (533.38±6.97 mg/g) and thermal conductivity (1.058±0.77 W/(m?K)) of CA-GC were significantly improved. The blending process of graphene further enhanced the thermal conductivity (2.61±0.15 W/(m?K)) and equilibrium adsorption capacity (712.84±30.66 mg/g) of the composite carbon material SC-GC. When the desorption temperature was 100 °C and the cycle time was 60 min, the desorption capacity, refrigeration capacity, and refrigeration power of the continuous refrigeration cycle of the adsorption refrigeration bed constructed by SC-GC reached 533.10±14.17 mg/g, 486.95±9.79 kJ/kg, and 973.86±15.28 kJ/(kg?h), respectively. |
| Key words: adsorption refrigeration activated carbon methanol thermal conductivity refrigeration power |
