Almurtaji Salah, Ali Naser, Teixeira Joao A, Addali Abdulmajid
Transport and Manufacturing (SATM), School of Aerospace, Cranfield University, MK43 0AL Cranfield, UK.
Kuwait Army, Kuwait Ministry of Defense, Safat 13128, Kuwait.
Nanomaterials (Basel). 2020 Apr 11;10(4):734. doi: 10.3390/nano10040734.
Heat exchangers are key components in many of the devices seen in our everyday life. They are employed in many applications such as land vehicles, power plants, marine gas turbines, oil refineries, air-conditioning, and domestic water heating. Their operating mechanism depends on providing a flow of thermal energy between two or more mediums of different temperatures. The thermo-economics considerations of such devices have set the need for developing this equipment further, which is very challenging when taking into account the complexity of the operational conditions and expansion limitation of the technology. For such reasons, this work provides a systematic review of the state-of-the-art heat exchanger technology and the progress towards using nanofluids for enhancing their thermal-hydraulic performance. Firstly, the general operational theory of heat exchangers is presented. Then, an in-depth focus on different types of heat exchangers, plate-frame and plate-fin heat exchangers, is presented. Moreover, an introduction to nanofluids developments, thermophysical properties, and their influence on the thermal-hydraulic performance of heat exchangers are also discussed. Thus, the primary purpose of this work is not only to describe the previously published literature, but also to emphasize the important role of nanofluids and how this category of advanced fluids can significantly increase the thermal efficiency of heat exchangers for possible future applications.
热交换器是我们日常生活中许多设备的关键组件。它们被应用于许多领域，如陆地车辆、发电厂、船用燃气轮机、炼油厂、空调和家庭用水加热。其运行机制依赖于在两种或更多种不同温度的介质之间提供热能流动。对此类设备的热经济学考量提出了进一步开发这种设备的需求，鉴于运行条件的复杂性和技术的扩展限制，这极具挑战性。出于这些原因，本文对最先进的热交换器技术以及使用纳米流体提高其热工水力性能方面的进展进行了系统综述。首先，介绍了热交换器的一般运行理论。然后，深入聚焦于不同类型的热交换器，即板框式和板翅式热交换器。此外，还讨论了纳米流体的发展、热物理性质及其对热交换器热工水力性能的影响。因此，本文的主要目的不仅是描述先前发表的文献，还在于强调纳米流体的重要作用，以及这类先进流体如何能够显著提高热交换器的热效率，以供未来可能的应用。
