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State-of-the-art in heat exchanger additive manufacturing

机译：热交换器添加剂制造中最先进的

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摘要

The progress in additive manufacturing (AM) sector has transformed the ways in which heat exchangers (HXs) can be fabricated. The complex and freeform designs which could not be realized by conventional manufacturing routes can now be realized through AM technologies. The weight, volume, load bearing capabilities and manufacturing cost reductions are some of the other benefits that AM can provide over the conventional manufacturing. The relative benefits of using AM to make heat exchangers, however, are accompanied by various inherent challenges related to the process parameters, surface quality and material choice. A comprehensive understanding of the fabricated HX surface quality is imperative to explain the resulting flow and thermal characteristics. This study focusses on analyzing the thermal-hydraulic performance of additively manufactured HXs such as rough surfaces, microchannels, surface area and turbulence promoters, cellular materials, heat pipes, turbomachinery cooling designs, and jet impingement cooling concepts. The review of the existing literature suggests that the inherent surface roughness is the key consideration across different types of heat exchanger configurations manufactured by metal additive manufacturing. Significant deviation of the manufactured dimensions is observed relative to the intended design, especially when the dimensions approach the manufacturing limits. With the continuously improving AM technologies in terms of final product surface quality, dimensional accuracy, and realization of smaller length scales with accuracy, one can expect exciting times ahead in heat exchanger development and to this end, the review paper may serve as an essential reference tool.
机译：添加剂制造（AM）部门的进展转化了可以制造热交换器（HXS）的方式。现在可以通过AM技术实现传统制造路线无法实现的复杂和自由形式设计。重量，体积，承载能力和制造成本减少是其他一些益处，即在传统的制造中可以提供。然而，使用AM用于制造热交换器的相对益处伴随着与过程参数，表面质量和材料选择相关的各种固有挑战。对制造的HX表面质量的全面了解是必须解释所产生的流动和热特性。本研究重点是分析粗糙表面，微通道，表面积和湍流启动子，蜂窝材料，热管，涡轮机械冷却设计和喷射冲击冷却概念的粗制制造的HX的热液压性能。现有文献的审查表明，固有的表面粗糙度是通过金属添加剂制造制造的不同类型的热交换器配置的关键考虑因素。相对于预期的设计，观察到制造尺寸的显着偏差，特别是当尺寸接近制造限制时。随着在最终产品表面质量，尺寸精度和较小长度的实现方面不断改进AM技术，精度可以预期热交换器开发中的令人兴奋的时间，并以此，审查纸可以作为必要的参考工具。

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