Calculation of Two-Phase Convective Heat Transfer Coefficients of Cryogenic Nitrogen Flow in Plate-Fin Type Heat Exchangers
| Autor: | Mo Chung, Seungha Park, Jie Liu |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Fluid Flow and Transfer Processes
Dynamic scraped surface heat exchanger Materials science Convective heat transfer Critical heat flux Mechanical Engineering Thermodynamics Heat transfer coefficient Condensed Matter Physics Annular fin Fin (extended surface) Physics::Fluid Dynamics NTU method Micro heat exchanger |
| Zdroj: | Heat Transfer Engineering. 35:674-684 |
| ISSN: | 1521-0537 0145-7632 |
| DOI: | 10.1080/01457632.2013.837376 |
| Popis: | The two-phase convective heat transfer coefficients for nitrogen inside the flow path of plate-fin type heat exchangers operating at cryogenic temperatures are calculated using CFX Release 13.0. Using a homogeneous two-phase model, the governing equations are solved to find pressure, velocity, and enthalpy distributions for three types of fin geometries: plain, wavy, and serrated. The results are further processed to evaluate the wall shear stress and heat flux, which in turn yield the friction coefficients and convective heat transfer coefficients. The coefficients are presented as functions of system pressure, flow rate, and local quality. The results can be used for the design of plate-fin type exchangers with the same fin configurations and operating conditions as the calculation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|