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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Measurements of the gas-particle convective heat transfer coefficient in a packed bed for high-temperature energy storage
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Measurements of the gas-particle convective heat transfer coefficient in a packed bed for high-temperature energy storage

机译：高温储能填充床中气体颗粒对流传热系数的测量

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Experimental measurements of the forced convection gas-particle heat transfer coefficient in a packed bed, high-temperature, thermal energy storage system were performed using a custom-made experimental facility. Special attention was paid to the application of uncertainty analysis (a very important concept in experimentation). General and detailed uncertainty analyses were carried out, which identified the choices that were made in the experimental planning and procedure to ensure reliable final results. The experimental data reduction program used the governing equations and the results of the uncertainty analysis while making allowance for media property variations with temperature. Results were correlated in terms of Nusselt number, Prandtl number and Reynolds number and comparisons were made with existing correlations developed with similar storage media. The maximum temperature for the bed was about 1000 degreesC (1830 degreesF) with flue gas as the operating fluid in the storage mode and atmospheric air in the recovery mode. Because most related previous studies were not necessarily focused on high-temperature applications, the published gas-particle heat transfer correlations were obtained at relatively low temperature ranges, generally at room temperature or at temperatures slightly above room temperature. Moreover, only a few of the previously reported correlations associated the results with the corresponding uncertainty margins. The results from this study give a convective gas-particle heat transfer correlation for high-temperature thermal energy storage applications. Also, due to substantial uncertainties normally associated with the measurements of this heat transfer coefficient, it is significant to note that no firm conclusions can be reached on the validity or non-validity of previously reported related correlations for which the uncertainty margins were not reported. (C) 2001 Elsevier Science Inc. All rights reserved. [References: 19]
机译：使用定制的实验设备对填充床，高温，热能存储系统中的强制对流气体-颗粒传热系数进行了实验测量。特别注意不确定性分析（实验中​​的一个非常重要的概念）的应用。进行了一般性和详细性不确定性分析，确定了在实验计划和程序中做出的选择，以确保获得可靠的最终结果。实验数据缩减程序使用控制方程式和不确定性分析的结果，同时考虑了介质性质随温度的变化。将结果按照努塞尔数，普朗特数和雷诺数进行关联，并与使用类似存储介质开发的现有关联进行比较。床的最高温度约为1000摄氏度（1830华氏度），其中烟气作为工作流体处于存储模式，而大气则处于回收模式。由于大多数相关的先前研究不一定都专注于高温应用，因此已发布的气体-颗粒传热相关性是在相对较低的温度范围（通常在室温或略高于室温的温度）下获得的。此外，只有少数先前报告的相关性将结果与相应的不确定性余量相关联。这项研究的结果为高温热能存储应用提供了对流气体-颗粒传热的相关性。而且，由于通常与该传热系数的测量相关的较大不确定性，因此值得注意的是，对于先前报告的相关相关性的有效性或无效性，没有报告不确定性裕度，因此无法得出确切的结论。 （C）2001 Elsevier Science Inc.保留所有权利。 [参考：19]

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