Direct-Contact Heat and Mass Transfer Packings and Packed Beds

Submission Deadline: 12 June 2024 Submit to Special Issue

Guest Editors

Yiding Cao, Florida International University, USA
Dr. Yiding Cao, a Fellow of the American Society of Mechanical Engineers (ASME), is a Professor at Florida International University (FIU). He obtained his Ph.D. degree from the University of Dayton in 1991 and joined the Department of Mechanical and Materials Engineering of FIU in 1993. Dr. Cao’s research areas include renewable energy systems, aerospace applications, heat pipes, fluid flow and heat transfer, internal combustion engines, and gas turbine cooling. Prof. Cao has authored and co-authored more than 88 Journal papers and has more than 20 U.S. patents. He has been an expert in Heat Pipe technology since early 1990 and is a pioneer in high-temperature heat pipe startup/transient simulations, gas turbine/diesel engine cooling employing high-temperature heat pipes, and miniature heat pipes for electronics cooling. He is recently the inventor of Utility-Scale Hot Water Storage (USHWS) for Power Production and Heat Supply and Air-Water Thermal Power Plants, as well as the reciprocating-airfoil (RA) driven VTOL aircraft, and is a World's Top 2% Most Cited Scientist, 2020.


Direct-contact heat and mass transfer packing (or its alternative term, direct-contact heat and mass exchangers) are integral components in the cooling towers of thermal power plants and dryers. In cooling tower applications, such packings enable the efficient evaporation of water into an air stream using a counterflow configuration, thereby cooling the descending water. Moreover, such cooling towers find utility in the cooling of diesel engines or other engine systems.

Emerging innovations in the renewable energy sector, particularly those related to air-water thermal power plants, employ direct-contact heat and mass transfer packing to create a vapor-air mixture for power production, facilitating the use of low-temperature heat sources. In a parallel manner, packed beds are often utilized in direct-contact condensers, permitting the effective condensation of large amounts of water vapor within a small condenser volume.

In this Special Issue, we invite the submission of both research and review articles relevant to Direct-Contact Heat and Mass Transfer Packings and Packed Beds. Contributions may include experimental, semi-empirical, analytical, or computational studies. We specifically encourage submissions focusing on Packings and Packed Beds operating at higher temperatures.


Direct-contact heat and mass transfer packing; cooling towers; renewable energy; packed beds

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