| Title |
In-tube Condensation Heat Transfer Characteristics of CO2 with CH4 at Near Critical Pressure |
| Authors |
Kyeonghee Hong ; Wongeun Baik ; Rin Yun |
| DOI |
https://doi.org/10.6110/KJACR.2022.34.1.010 |
| Keywords |
이산화탄소 수송; 메탄; 응축열전달; 압력강하; 임계점 근처 CO2 transportation; CH4; Condensation heat transfer; Pressure drop; Near-critical |
| Abstract |
The condensation heat transfer coefficient and pressure drop for pure CO2 and CO2+CH4 mixture were investigated under the near-critical condition, which simulates the CO2 transporting conditions under Carbon Capture and Storage (CCS) process. The experimental facility consisted of a test section, heat exchangers, mass flow meters, temperature sensors, a magnetic gear pump, and a differential pressure transducer. The test section made with a copper tube was assembled with Polyvinyl Chloride (PVC) pipe to form a double tube. The condensation temperature and mole fraction of CH4 in the CO2 mixture ranged from 20℃ to 30℃, and 1% to 5%, respectively. The mass flux was changed from 500, 600, and 700 kgm-2s-1. The two-phase flow pattern under the set conditions was estimated to be the annular flow. When the mole fraction of methane in the mixture increased from 1% to 5% at 20℃ of condensation temperature, the average condensation heat transfer coefficients and the pressure drop for CO2+CH4 decreased from 4.97% to 19.9%, and 30.0% to 54.5%, respectively, compared to those for pure CO2 |