Heat Transfer Enhancement-a Brief Review of Literature in 2020 and Prospects

Abstract

This review provides a brief literature survey on enhanced heat transfer research published in the English language journals in 2020. A topic search containing either "heat transfer" or "heat transport" or "thermal transport" in the Web of Science resulted in over 28,000 papers published in 2020 and nearly 30% were relevant to heat transfer intensification, which indicates the importance and rapid development of heat transfer enhancement technologies. The chosen studies focus on various heat transfer enhancement research categorized into conduction, convection, radiation, boiling and condensation, energy storage, thermal management, and cross research involving two or more categories. Heat conduction papers are selected from the micro/nanoscale areas with a focus on interfacial phenomena. Important active, passive, and compound techniques for enhancing convective heat transfer are incorporated. Thermal radiation is concentrated on near-2 field radiation and solar energy. Heat transfer enhancement in boiling and condensation as well as in thermal energy storage, renewable and sustainable energy, and thermal management of electronics and high-end equipment is critical in many engineering applications. From the selected literature published in 2020, significant attempts have been made to research and development on heat transfer enhancement technology covering both conventional and emerging techniques. The prospects of the heat transfer enhancement research are reflected according to the literature survey.Research of innovative heat transfer enhancement techniques is immense, encompassing every aspect from understanding the fundamental theory and physical mechanisms of various heat transfer enhancement techniques to their applications. Research of emerging techniques using new interfacial materials, nanofluids, micro-and nano-structures, microchannels, and new compound enhancement techniques incorporating conventional and new techniques becomes popular.However, there are big challenges in understanding the mechanisms, engineering design methodology and applications with these emerging techniques. Many aspects are urgently needed to be investigated and developed to achieve systematic theory, mechanisms and design methodology for applications in thermal processes, energy storage, renewable energy, decarbonized heating and cooling and many industrial and civil sectors.

CFD Modelling of Pressure Drop in Double-Pipe Heat Exchanger with Turbulators Using a Porous Media Model

“…Efficient heat transfer is crucial in various industrial applications, such as food processing, refrigeration, electronics, power plants, and waste heat recovery [1][2][3][4][5][6][7]. Tubein-tube heat exchangers have many economic advantages compared to other configurations and are therefore widely used in industry.…”

Thermal Performance in Convection Flow of Nanofluids Using a Deep Convolutional Neural Network

“…Heat transfer enhancement has been a leading topic of research and study in many engineering areas in the past five decades [1]. The related techniques are developed to improve the performance of heat transfer systems, to save energy, and to conserve limited natural resources.…”

High Heat Flux Cooling Technologies Using Microchannel Evaporators: Fundamentals and Challenges

“…Enhancement of flow boiling heat transfer and CHF and stability of vapor liquid two phase flow in micro-channel evaporators are important to meet the high heat flux cooling requirements [17][18][19][20]. Over the past years, extensive studies have been conducted to enhance flow boiling performances in microchannels in terms of heat transfer coefficient, CHF and stabilization of twophase flows.…”

“…Over the past years, extensive studies have been conducted to enhance flow boiling performances in microchannels in terms of heat transfer coefficient, CHF and stabilization of twophase flows. Various heat transfer enhancement approaches including modifying surface properties, intensifying mixing or disturbance and enhancing nucleate boiling have been exploited to significantly increase flow boiling heat transfer performances and CHF in multi-microchannel evaporators [17,18]. Furthermore, enhanced microchannels with various surface structures have also attracted much attention to mitigate two-phase flow instabilities in flow boiling.…”