Abstract Boiling heat transfer over tube bundles has been extensively applied to various industries with a high demand for efficient heat transfer. This work presents a review of recently published studies on pre-CHF boiling heat transfer across plain and enhanced tube bundles. Bundle effect and heat transfer enhancement by modified heating surfaces under various operating and geometric parameters are analyzed. Flow regime maps for boiling two-phase flow in horizontal and vertical bundles are critically described separately. The local boiling heat transfer performance is affected by the non-uniform heat flux distribution in a bundle. A decreasing heat flux distribution along the bundle height can enhance the bundle effect. The effect of the pitch to diameter ratio on bundle effect also depends on the heat flux distribution. Significant influences of the bundle inclination angle and elevation angle on the boiling heat transfer were observed by researchers. Complex bundle effect was found in special shape bundles, such as V-shape, C-shape, and U-shape bundles, which suggests applying different HTC correlations to different regions in a bundle. Moreover, the bundle boiling behaviors under sub-atmospheric and sub-critical pressures have been examined. The heat transfer performance in tube bundles with enhanced surfaces is significantly impacted by the surface characteristics and the imposed heat flux. Bundle effect is still prominent, and the surface enhancement reduces along the bundle height. A mixed bundle with enhanced tubes only in the lower part can achieve the same heat transfer performance as a fully enhanced bundle.

中文翻译：

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具有或不具有增强表面的管束的预 CHF 沸腾传热性能 - 综述

摘要 管束沸腾传热已广泛应用于对高效传热要求较高的各个行业。这项工作回顾了最近发表的关于跨平面管束和增强管束的预 CHF 沸腾传热的研究。分析了在各种操作和几何参数下改进的加热表面的束效应和传热增强。水平和垂直束中沸腾两相流的流态图分别进行了严格的描述。局部沸腾传热性能受束内热通量分布不均匀的影响。沿束高度的热通量分布减小可以增强束效应。节径比对束效应的影响还取决于热通量分布。研究人员观察到束倾角和仰角对沸腾传热的显着影响。在特殊形状的束中发现了复杂束效应，例如 V 形、C 形和 U 形束，这表明对束中的不同区域应用不同的 HTC 相关性。此外，还研究了亚大气压和亚临界压力下的束沸腾行为。具有增强表面的管束中的传热性能受表面特性和施加的热通量的显着影响。束效应仍然突出，表面增强沿束高度减小。仅在下部具有增强管的混合管束可以获得与完全增强管束相同的传热性能。