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首页> 外文期刊>International Journal of Heat and Mass Transfer >Thermal properties study and performance investigation of potassium formate solution in a falling film dehumidifier/regenerator
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Thermal properties study and performance investigation of potassium formate solution in a falling film dehumidifier/regenerator

机译：降膜除湿机/再生器中甲酸钾溶液的热性能研究和性能研究

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摘要

Compared with the extensive attention drawn by salt solutions, the promising potassium formate (KCOOH) solution which has smaller causticity and lower price receives little attention in the field of liquid desiccant cooling system (LDCS). Consequently, the present paper studied both the thermal properties and mass transfer performance of KCOOH solution for its practical engineering application. The vapor pressure and density of KCOOH solution under different concentrations and temperatures were measured and then fitted in the form of polynomials with the mean absolute relative deviation (MARD) of 0.06% and 0.551% respectively. Referring to the data in the existing literature, the heat capacity of KCOOH solution was also fitted with the MARD of 0.15%. Mathematical models of dehumidification/regeneration with the film shrinkage on the plate dehumidifier/regenerator were developed and validated by the experimental data. Results showed that the wetting ratio predicted by the model matched well with the measured one with the relative difference of 3.4%. Besides, the dehumidification/regeneration performance obtained by the model in terms of absolute moisture change was also in line with the experimental ones with the MARD of 6.05%/4.2%. In summary, the correlations of KCOOH solution thermal properties, mathematical model, and experimental results were valuable for the engineering application of KCOOH solution in LDCS. (C) 2019 Elsevier Ltd. All rights reserved.
机译：与盐溶液引起的广泛关注相比，具有前景的甲酸钾（KCOOH）溶液具有较小的腐蚀性和较低的价格，在液体干燥剂冷却系统（LDCS）领域中很少受到关注。因此，本文研究了KCOOH溶液的热性质和传质性能，以用于其实际工程应用。测量在不同浓度和温度下的KCOOH溶液的蒸气压和密度，然后以多项式的形式拟合，其平均绝对相对偏差（MARD）分别为0.06％和0.551％。参照现有文献中的数据，KCOOH溶液的热容量也符合0.15％的MARD。建立了除湿/再生随板式除湿器/再生器上薄膜收缩的数学模型，并通过实验数据进行了验证。结果表明，该模型预测的润湿率与测得的润湿率非常吻合，相对差异为3.4％。此外，该模型在绝对湿度变化方面获得的除湿/再生性能也与实验值一致，其MARD分别为6.05％/ 4.2％。综上所述，KCOOH溶液的热性质，数学模型和实验结果之间的相关性对于KCOOH溶液在LDCS中的工程应用是有价值的。 （C）2019 Elsevier Ltd.保留所有权利。

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