Evaluation of methanol adsorption on activated carbons for thermally driven chillers part I: Thermophysical characterisation

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• 作者：S.K. Henninger^a ; ^{stefan.henninger@ise.fraunhofer.de} ; M. Schicktanz^a ; P.P.C. Hü ; genell^a ; H. Sievers^b ; H.-M. Henning^a
• 关键词：Activated carbon ; Methanol ; Heat pump ; Adsorption system ; Refrigerating unit ; Thermodynamic cycle
• 刊名：International Journal of Refrigeration
• 出版年：2012
• 出版时间：May, 2012
• 年：2012
• 卷：35
• 期：3
• 页码：543-553
• 全文大小：1522 K

文摘

In this first part a comprehensive thermophysical characterisation of six activated carbons - based on coconut, peat and stone coal with focus on thermally driven chillers is reported. Pore and surface analysis are performed using N₂ and CO₂ adsorption. Furthermore the density and heat capacity of the samples is determined. Methanol adsorption measurements for evaporation between ??¡ãC and 35?¡ãC and driving temperatures up to 130?¡ãC are realized using a thermobalance and evaluated using the Dubinin-Astakhov (DA) approach. Based on the given DA equations, the possible loading lifts for typical applications like 95¡ã-35¡ã-7?¡ãC are calculated. The samples show very attractive maximum loading lifts up to 0.385?g?g^?. Furthermore the mass and volume specific cooling enthalpy of 244?kJ?kg^? and?126?kJ?dm^? under realistic conditions demonstrates the good performance of this working pair.