Krzysztof Kus , Marcin Wójcik , Ziemowit Malecha , Zbigniew Rogala
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Abstract
This paper presents a study of a novel type of heat exchanger (HE) whose core is built based on a Triply Periodic Minimal Surface structure. The core of this exchanger is built as a periodic structure based on a gyroid-type lattice and is manufactured by laser powder-bed fusion technology. This solution is distinguished not only by an exceptionally favorable ratio of the heat exchange surface area to the volume occupied but also by a unique geometry that additionally turbulates the flow and intensifies the heat exchange process. This article contains the results of numerical analyses of the entire exchanger under different operating conditions and the results of analyses of small fragments of the core filled with cells of different sizes. Numerical analyzes of the lattice-type exchanger are performed on the basis of the experimentally validated numerical model. The objective of the study is to determine the performance of the gyroid HE under different operational conditions and select the best elementary cell size per exchanger core for the assumed operating conditions. The printed HE was compared with a plate HE that was 30% larger, although the lattice one managed to achieve 10.5% higher values in on average Number of Transfer Units (NTU) and on average 5% higher temperature effectiveness (TE) in the studied range of flow parameters.
本文研究了一种新型热交换器(HE),其核心是基于三周期最小表面结构构建的。这种热交换器的内核是基于陀螺型晶格的周期性结构,由激光粉末床熔融技术制造而成。这种解决方案的特点不仅在于热交换表面积与所占体积之比特别理想,而且还在于其独特的几何形状能使流体产生额外的湍流并强化热交换过程。本文包含在不同运行条件下对整个交换器进行数值分析的结果,以及对装有不同大小单元的小块芯子进行分析的结果。格子型交换器的数值分析是在实验验证的数值模型基础上进行的。研究的目的是确定陀螺仪 HE 在不同运行条件下的性能,并根据假定的运行条件为每个交换芯选择最佳的基本单元尺寸。印刷式 HE 与板式 HE 进行了比较,后者比印刷式 HE 大 30%,但在所研究的流动参数范围内,格子式 HE 的平均传质单位数 (NTU) 值比印刷式 HE 高 10.5%,平均温度效率 (TE) 高 5%。
期刊介绍:
International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems.
Topics include:
-New methods of measuring and/or correlating transport-property data
-Energy engineering
-Environmental applications of heat and/or mass transfer