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Dr. Ting Ma

Key Laboratory of Thermo-Fluid Science and Engineering, MOE, Xi'an Jiaotong University, China

 

Talk Title
Study on Thermal-Hydraulic Performance and Fabrication of Printed Circuit Heat Exchanger for Natural Gas liquefaction System

Talk Abstract
 

Printed circuit heat exchanger (PCHE) has received considerable attention in recent years. The first feature of PCHE is that its mini-channels are fabricated by the photochemical-etching technology, so that the channel hydraulic diameter is very small, and could fabricate very complex channels to enhance the heat transfer. The second feature is that the PCHE modules are brazed by diffusion bonding method, which uses the atomic diffusion to give the joints almost the same strength as the parent material. Due to these two features, the PCHE is considered to be the most promising candidate for ultra high temperature, high pressure and large temperature difference systems such as Ultra High Temperature Reactor, supercritical carbon dioxide (SCO2) Brayton cycle as well as Liquefied Natural Gas-Floating Production Storage and Offloading (LNG-FPSO). In this talk, the thermal-hydraulic performance of natural gas in PCHE during liquefaction process is numerically studied. Two numerical methods including single-phase model and Volume of Fluid Method (VOF) model are compared. The local thermal-hydraulic performance of natural gas from supercritical state to liquid state and effect of pressure are analyzed. At last, two technical fabrication challenges for PCHE, i.e., photochemical etching and diffusion bonding are presented. The effects of etchant components, initial width and geometrical structure on the photochemical etching quality, and the effects of joint and bonding temperature on the diffusion bonding quality are studied by photochemical etching and diffusion bonding experiments.

Short Biography

Dr. Ting Ma is an associate professor of School of Energy and Power Engineering at Xi’an Jiaotong University. He received his Ph.D. at Xi’an Jiaotong University in 2012. He visited Department of Mechanical Engineering at University of Nevada, Las Vegas from August 2011 to January, 2012, and visited Department of Mechanical Engineering at Virginia Tech from March 2014 to February, 2015. His major research interests include heat transfer enhancement under high temperature and high pressure conditions, microgravity phase-change heat transfer, compact mini/micro-channel heat exchangers, thermoelectric power generator and cooler. He has been a co-author of two book chapters, and published more than 30 journal papers as well as 40 peer-reviewed conference papers. He has given seven keynote/invited presentations in international conferences, and been session chairs in two international conferences. He is an invited reviewer of more than 10 journals. He was selected as the member of scientific advisory board in the 10th Conference on Sustainable Development of Energy, Water and Environment Systems and the 2nd South East Europe (SEE) Conference on Sustainable Development of Energy, Water and Environment Systems. He was selected as the youth talent collection plan of Shaanxi university in 2016.

 
Talk Keywords
Printed Circuit Heat Exchanger, Natural Gas liquefaction, Thermal-hydraulic Performance, Photochemical Etching, Diffusion Bonding.
 
Target Audience
Students, Post doctoral, Industry, Doctors and professors
 
Speaker-intro video
TBA 
 

The International Conference on Innovative Applied Energy (IAPE’18)