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首页> 外文期刊>Journal of Heat Transfer >A Comparison of Simplified One-Dimensional and Two-Dimensional Analytical Models for Predicting Metallic Recuperator Performance
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A Comparison of Simplified One-Dimensional and Two-Dimensional Analytical Models for Predicting Metallic Recuperator Performance

机译：用于预测金属恢复性能的简化一维和二维分析模型的比较

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摘要

The performance models for high-temperature metallic recuperators considering one and two-dimensional heat transfer are presented. In one-dimensional model, an explicit expression to represent the effect of both the temperature and product of partial pressure and mean beam length on the emissivity is developed using emissivity charts. The effect of upstream and downstream surroundings is neglected. A two-dimensional heat transfer model is developed using zone method along with sum-of-gray-gases approximation to study the effect of upstream and downstream surroundings on performance. The results from the two models are compared. For lower values of inlet flue gas temperatures and higher mass flow rates, one-dimensional model predicts results within 5% of two-dimensional model. One-dimensional model provides a simplified solution for the assessment of recuperator performance but predicts the surface temperature distribution on a relatively lower side for higher inlet flue gas temperatures and low mass flow rates.
机译：提出了考虑一个和二维传热的高温金属倒置器的性能模型。在一维模型中，使用发射率图表开发了一种明确的表达式来表示分压和平均光束长度的温度和乘积的效果。忽略了上游和下游环境的效果。使用区域方法开发二维传热模型，以及灰气和近似，以研究上游和下游环境对性能的影响。比较了两种模型的结果。对于入口烟气温度和质量流量较高的较低值，一维模型预测导致二维模型的5％内。一维模型提供了一种简化的解决方案，用于评估恢复器性能，但是预测相对较低侧的表面温度分布，用于更高的入口烟气温度和低质量流量。

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