Abstract Developing strategies to reduce mass and heat transport limitations is one of the most important challenges in adsorption heat exchanger technology. Due to the strong coupling of mass and heat transport in these systems, it is difficult to determine the individual transport limitations quantitatively. In order to find an optimal design where heat and mass transport are balanced, a quantitative method that enables a direct comparison of these two transport phenomena is needed. In the present work, a novel experimental approach to discriminate between mass and heat transport is proposed based on the measurement of adsorbent temperature, heat exchanger surface temperature and vapor pressure. The methodology is applied to micro/mesoporous silica spheres arranged in a monolayer or bilayer loose grain configuration or in a monolayer configuration adhesively bonded to the substrate. While the monolayer configuration exhibits balanced heat and mass transport, we find that the bilayer and the thermally enhanced configurations are limited by heat and mass transport, respectively. The application of the proposed methodology to compare heat and mass transport limitations in other industrially-relevant adsorbent materials should greatly aid the design of more efficient adsorption heat exchangers for a wide range of applications.

中文翻译：

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吸附式换热器传热传质限制的量化：应用于硅胶/水工作副

摘要 开发减少传质和传热限制的策略是吸附式换热器技术中最重要的挑战之一。由于这些系统中质量和热量传输的强耦合，很难定量确定单个传输限制。为了找到平衡热量和质量传输的最佳设计，需要一种能够直接比较这两种传输现象的定量方法。在目前的工作中，基于吸附剂温度、换热器表面温度和蒸汽压的测量，提出了一种区分质量和传热的新实验方法。该方法应用于排列成单层或双层松散颗粒结构或单层结构的微孔/中孔二氧化硅球体，该球体以粘合剂粘合到基材上。虽然单层配置表现出平衡的热量和质量传输，但我们发现双层和热增强配置分别受到热量和质量传输的限制。应用所提出的方法来比较其他工业相关吸附材料中的传热和传质限制，应该极大地有助于设计更有效的吸附换热器，以用于广泛的应用。我们发现双层和热增强配置分别受到热量和质量传输的限制。应用所提出的方法来比较其他工业相关吸附材料中的传热和传质限制，应该极大地有助于设计更有效的吸附换热器，以用于广泛的应用。我们发现双层和热增强配置分别受到热量和质量传输的限制。应用所提出的方法来比较其他工业相关吸附材料中的传热和传质限制，将极大地有助于设计更有效的吸附热交换器，以用于广泛的应用。