Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7054047 | International Journal of Heat and Mass Transfer | 2018 | 7 Pages |
Abstract
In the Carbon Capture, Transportation & Storage (CCS) process, CO2 is captured with impurities such as N2, CH4 and Ar and is transported under a supercritical state. In this study, the characteristics of in-tube convective heat transfer of CO2 mixtures such as CO2â¯+â¯N2, CO2â¯+â¯CH4 and CO2â¯+â¯Ar were experimentally investigated under the land transportation conditions of the CCS process. The test tube was made of a cooper tube buried in a PVC (Polyvinyl Chloride) pipe which was compactly filled with sand, which simulated the land CO2 transportation. Mass flux was changed by 200, 400 and 600â¯kgâ¯mâ2â¯sâ1, and operational pressures were 80, 90, and 100â¯bar. Operational temperatures ranged from 25 to 55â¯Â°C. The heat transfer coefficient of the CO2 mixtures dominantly followed the trends of pure CO2; however, they were decided by the type and quantity of the impurity. When the CO2 mole fraction was changed from 1.00 to 0.95, the maximum heat transfer coefficient at the pseudo-critical temperature of CO2â¯+â¯N2 and CO2â¯+â¯CH4 decreased by 4389â¯W·mâ2â¯Kâ1 and 2770â¯W·mâ2â¯Kâ1, respectively. As the mass flux increased, the heat transfer coefficient increased in all of the CO2 mixtures.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Wonjun Lee, Rin Yun,