A statistical physics-based methodology for evaluating the efficiency of an adsorption refrigeration cycle using C3H2F4/Maxsorb III

IF 5.1 3区工程技术 Q2 ENERGY & FUELS

Thermal Science and Engineering Progress Pub Date : 2024-10-01 DOI:10.1016/j.tsep.2024.102940

Wouroud Sghaier, Yosra Ben Torkia, Abdelmottaleb Ben Lamine

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引用次数: 0

Abstract

Recently, the statistical physics modeling found a great success in the description of various aspects of adsorption phenomena such as olfaction, depollution, and photovoltaic processes. Therefore, we attempted here to apply this treatment in the domain of refrigeration by an adsorption/ desorption process cycle, using the grand canonical formalism of the statistical physics as a working tool. So, for this study, four advanced equations based on statistical physics treatment are used to clarify the adsorption process at molecular level and define its physico-chemical parameters for refrigeration applications. Our results showed that the double layer model with two energies provides useful details concerning this phenomenon by determining the number of captured HFO-1234ze (E) (C₃H₂F₄) molecules per site

n_{A M},

the density of receptor site

D_{r s}

, the adsorption quantity at saturation N _{a sat} and two energetic parameters

P_{h s 1}

and

P_{h s 2}

. The steric results revealed that the adsorbed C₃H₂F₄ molecules tended towards a parallel position when the temperature increased. Evaluations of the adsorption energies and enthalpy values indicated that the anchoring process is exothermic and of a physisorption nature. In order to improve the thermodynamic efficiency, the coefficient of performance was calculated by analyzing changes in thermodynamic functions, giving a value of 0.58 for the C₃H₂F₄ / Maxsorb III. Also, the COP value can be enhanced by using the same adsorbate with high compressibility to minimize the machine size but changing the present adsorbent by activated carbon derived from biomass such as: Waste Palm Trunk (WPT-AC) and Mangrove wood (M−AC).

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使用 C3H2F4/Maxsorb III 评估吸附制冷循环效率的统计物理方法

最近，统计物理学模型在描述嗅觉、去污染和光伏过程等吸附现象的各个方面取得了巨大成功。因此，我们在此尝试使用统计物理学的大规范形式主义作为工作工具，通过吸附/解吸过程循环将这一处理方法应用于制冷领域。因此，在这项研究中，我们使用了四个基于统计物理学处理方法的高级方程来阐明分子层面的吸附过程，并确定其在制冷应用中的物理化学参数。我们的研究结果表明，具有两种能量的双层模型通过确定每个位点捕获的 HFO-1234ze (E) (C3H2F4) 分子数 nAM、受体位点密度 Drs、饱和时的吸附量 N a sat 以及两个能量参数 Phs1 和 Phs2，提供了有关这一现象的有用细节。立体结果显示，当温度升高时，被吸附的 C3H2F4 分子趋向于平行位置。对吸附能和吸附焓值的评估表明，锚定过程是放热的，属于物理吸附性质。为了提高热力学效率，通过分析热力学函数的变化计算了性能系数，得出 C3H2F4 / Maxsorb III 的性能系数为 0.58。此外，还可以通过使用相同的高压缩性吸附剂来提高 COP 值，以尽量减小机器尺寸，但要将现有的吸附剂换成生物质活性炭，如废棕榈树干（WPT-AC）和红树林（M-AC）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

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