Plenary Lectures

guo.png
Dr. Zhixiong (James) Guo
Professor of Mechanical and Aerospace Engineering
Rutgers University-New Brunswick (New Jersey, USA)
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RECENT TRENDS IN ENHANCED HEAT TRANSFER RESEARCH AND DEVELOPMENT

The demand on R&D of enhanced heat transfer is increasing because of the rapid development of modern technologies. Augmentation of heat transfer improves thermal energy transport, storage, and usage efficiencies, as well as speeds up thermal process in micro/nano technologies and/or under extreme conditions, e.g., large heat flux removal. Research continues to evolve to ensure not only the traditional methodologies, e.g., extended surfaces and surface modifications, meets the rapid changing world but also full advantage is taken of new science and technologies, e.g., particle and fluid additives, metamaterials, molecular and atomic scales. This plenary talk will provide a review of research trends on heat transfer enhancement in recent several years. Focus will be placed on thought-provoking interpretive and technique-innovative articles. It will conclude with some perspectives on enhanced heat transfer in the next decade.


Алексеенко.png Prof. Sergey Alekseenko
Head of Laboratory
Kutateladze Institute of Thermophysics (Novosibirsk, Russia)
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EFFECT OF WAVE AND VORTEX PHENOMENA ON TRANSFER PROCESSES IN POWER ENGINEERING

Fundamentals of wave and vortex dynamics in application to the problems of power engineering are presented in the current presentation. Recent advances in diagnostics and research of wave phenomena, vortex flows, multiphase media, falling liquid films, annular flows, flame structures and heat and mass transfer processes are presented. The basic wave- and vortex-based control methods of transfer processes are considered; they are divided into the passive (flow swirling, developed heat exchange surfaces) and active (mixing, periodic forcing) methods. Examples of wave and vortex technologies application in power engineering, including heat exchangers, burners, furnaces, combustion chambers, hydro turbines and multiphase apparatuses of cyclone and condenser types, are described. In some technical applications several types of devices and methods are used simultaneously, for instance, in coal-water fuel combustion technology. The conclusions addressing efficiency of application of wave or vortex devices (methods) in different power engineering challenges are made.


Lipiński.png Prof. Wojciech Lipiński
Professor of Research School of Engineering
The Australian National University (Canberra, Australia)
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HEAT TRANSFER RESEARCH FOR HIGH-TEMPERATURE SOLAR THERMAL APPLICATIONS

High-flux solar irradiation obtained with optical concentrators is an excellent source of clean process heat for high-temperature physical and chemical processing. Solar thermal power, the area that has traditionally driven developments in concentrating solar technologies, experiences renewed research interests, primarily in the context of large-scale dispatchable power generation. The area of solar thermochemistry aims at direct thermochemical production of chemical fuels and commodity materials. This presentation reviews the progress, challenges and opportunities in heat transfer research as applied to high-temperature solar thermal systems driven by high-flux solar irradiation. Selected pertinent areas include radiative transfer, multiscale heat and mass transfer, coupled heat and mass transfer in chemically reacting systems, thermal measurements in high-temperature systems, and thermal design of high-temperature solar thermal receivers and thermochemical reactors.



Prof. Bengt Sundén
Professor in Department of Energy Sciences
Lund University (Lund, Sweden)


IMPACT OF MICRO- AND NANOSTRUCTURES AND NANOFLUIDS ON HEAT TRANSFER PERFORMANCE

Deposition of micro- and/ or nanoparticles on a smooth surface will affect the heat transfer characteristics of the surface particularly for phase change applications like boiling. Similarly if nanoparticles are introduced into a liquid the thermal hydraulic performance will be affected both concerning convective heat transfer and phase change heat transfer. This plenary lecture presents recent experimental findings on effects of deposition of micro- and nanoparticles on the nucleate boiling and critical heat flux for pool boiling. How to deposit the particles and characterization of the surfaces are revealed. The lecture also discusses the fundamental mechanisms involved and gives advices for engineering design. For nanofluids, thermal hydraulic performances for convection in heat exchangers and phase change heat transfer are reviewed. Also using nanofluids for deposition of nanoparticles on a surface is discussed.



Prof. Ruzhu Wang
Director of Institute of Refrigeration and Cryogenics
Shanghai Jiao Tong University (Shanghai, China)
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THERMAL ENERGY STORAGE: CONCEPT, PROCESS, APPLICATIONS AND PERSPECTIVES

Thermal energy storage can be successfully used in solar energy engineering, waste heat recovery, heat transportation, and even electric peak-shaving. There are various ways for thermal energy storage, such as sensible, latent, sorption, and chemical reactions. Sensible thermal energy storage is widely used since it is already a matured technology, but there are still some gaps to fill for extended efficient uses. Latent thermal energy storage is already in use, however today’s market needs “thermal battery” with a variety of kWh capacities (1, 10, 100, 1000 or even more) and constant temperature at controllable thermal power that is still lacked. Sorption, and chemical reactions used for thermal energy storage are considered as a future great potential for thermal energy storage due to their high energy storage density. However this issue is still at the level of research or initial stage of application, since there are various bottle necks, such as cost effective sorption materials, good design of sorption bed, high efficiency thermal storage, control of the output temperature and power to meet the use demand. This lecture shows the various aspects related to thermal energy storage in materials, systems, and applications. The detailed future research and development perspectives are discussed as well.