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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Hygrothermal simulation-informed design of mesoporous desiccants for optimised energy efficiency of mixed mode air conditioning systems
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Hygrothermal simulation-informed design of mesoporous desiccants for optimised energy efficiency of mixed mode air conditioning systems

机译：湿热模拟的介孔干燥剂设计，可优化混合模式空调系统的能效

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This paper describes an optimization technique using hygrothermal numerical modelling to determine an ideal and unknown isotherm in order to inform the design of optimised mesoporous desiccants. Their suitability for passive humidity buffering as well as their impact on energy efficiency was assessed when assisting a mixed mode air-conditioning (AC) system. Three clear stages of water vapour adsorption were found that strongly correspond to the Delta w gradient when assessing the kinetics of adsorption and exchange rates for periodic moisture loads. Consistent agreement was found between the latent heat of dehumidification used by the AC system and the desiccant decay time after successive sorption loop cycles. This confirmed the material's suitability for specific applications and was found to be highly sensitive to the portion of the isotherm between phi(i),(L) - phi(i),(U) (Delta w gradient), compared with full adsorption capacity (total w) when assessing total energy consumption. The experimental results of sorption kinetics appeared to be slightly underestimated between the Delta w gradient and the response time to reach equilibrium moisture content (EMC). The major underestimations were found to be consistent with the kinetics of adsorption/desorption when analysing their significance based on w differences. These were largely attributed to a combination of adsorption kinetics (time-response) and adsorption/desorption hysteresis. However, this was not evident when comparing long-term experimental data and numerical estimations for water vapour sorption isotherms, since numerical model accurately predicted them. This suggests that both adsorption kinetics and the scanning curve prediction, within a hysteresis loop, are not accurately represented by current hygrothermal models and are hence a priority for future research.
机译：本文介绍了一种利用湿热数值模型确定理想和未知等温线的优化技术，以指导优化的介孔干燥剂的设计。在协助混合模式空调（AC）系统时，评估了它们对被动湿度缓冲的适用性以及对能源效率的影响。当评估周期性水分负荷的吸附动力学和交换速率时，发现三个清晰的水蒸气吸附阶段与Delta w梯度强烈对应。在连续的吸附回路循环后，AC系统使用的除湿潜热与干燥剂的衰减时间之间发现了一致的一致性。这证实了该材料对特定应用的适用性，并且被发现对phi（i），（L）-phi（i），（U）之间的等温线部分（Δw梯度）高度敏感，与全吸附容量相比（总w）评估总能耗时。吸附动力学的实验结果似乎在Delta w梯度和达到平衡水分含量（EMC）的响应时间之间被低估了。当基于w差异分析其重要性时，发现主要的低估与吸附/解吸的动力学一致。这些主要归因于吸附动力学（时间响应）和吸附/解吸滞后的组合。但是，在比较长期实验数据和水蒸气吸附等温线的数值估计时，这并不明显，因为数值模型可以准确地预测它们。这表明在滞后回线内的吸附动力学和扫描曲线预测均不能通过当前的湿热模型精确地表示出来，因此是未来研究的重点。

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