Heat Transfer Characteristics and Prediction Model of Supercritical Carbon Dioxide (SC-CO 2 ) in a Vertical Tube

Can Cai, Xiaochuan Wang, Shaohua Mao, Yong Kang, Yiyuan Lu, Xiangdong Han and Wenchuan Liu
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Can Cai: Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, Wuhan University, Wuhan 430072, China
Xiaochuan Wang: Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, Wuhan University, Wuhan 430072, China
Shaohua Mao: China Ship Development and Design Center, Wuhan 430072, China
Yong Kang: Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, Wuhan University, Wuhan 430072, China
Yiyuan Lu: Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, Wuhan University, Wuhan 430072, China
Xiangdong Han: Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, Wuhan University, Wuhan 430072, China
Wenchuan Liu: Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, Wuhan University, Wuhan 430072, China

Energies, 2017, vol. 10, issue 11, 1-21

Abstract: Due to its distinct capability to improve the efficiency of shale gas production, supercritical carbon dioxide (SC-CO 2 ) fracturing has attracted increased attention in recent years. Heat transfer occurs in the transportation and fracture processes. To better predict and understand the heat transfer of SC-CO 2 near the critical region, numerical simulations focusing on a vertical flow pipe were performed. Various turbulence models and turbulent Prandtl numbers ( Pr t ) were evaluated to capture the heat transfer deterioration (HTD). The simulations show that the turbulent Prandtl number model (TWL model) combined with the Shear Stress Transport (SST) k - ? turbulence model accurately predicts the HTD in the critical region. It was found that Pr t has a strong effect on the heat transfer prediction. The HTD occurred under larger heat flux density conditions, and an acceleration process was observed. Gravity also affects the HTD through the linkage of buoyancy, and HTD did not occur under zero-gravity conditions.

Keywords: shale gas; supercritical carbon dioxide; heat transfer characteristics; prediction model; heat flux density (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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