A COMPUTATIONAL STUDY OF COOLING HEAT TRANSFER TO SUPERCRITICAL METHANE IN A HORIZONTAL CIRCULAR TUBE
Methane is the principal component of coal-bed methane (CBM). Supercritical methane cooling is one of the most important heat transfer processes during the liquefaction of coal-bed methane. Due to the large variations of thermo-physical and transport properties of supercritical fluids, the convective heat transfer of supercritical methane exhibits striking features. It is of great significance to study the heat transfer behavior of supercritical methane cooling for designing the cryogenic heat exchangers and constructing the processes of coal-bed methane liquefaction. In this paper, cooling heat transfer to supercritical methane has been investigated numerically in horizontal tubes using the model proposed by Lam and Bremhorst to provide the basic knowledge of heat transfer characteristics. The numerical study focuses on the effects of mass flux and heat flux. The results show that when the buoyancy effect is considerably strong, it significantly affects the turbulent flow and heat transfer. Buoyancy effect enhanced heat transfer in the top line of circular tube, but impaired it in the bottom line.
cooling heat transfer supercritical methane horizontal circular tube buoyancy numerical investigation
Zhongxuan Du Wensheng Lin Anzhong Gu
Institute of Refri. and Cryo. Shanghai Jiao Tong University Shanghai, China, 200240 Institute of Refri. and Cryo.Shanghai Jiao Tong University Shanghai, China, 200240
国际会议
The Ninth Asian Thermophysical Properties Conference(第九届亚洲热物理性能会议 ATPC 2010)
北京
英文
531-536
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）