Flow boiling heat transfer of propane in 1.0 mm tube
| Autor: | Jacqueline Biancon Copetti, Jeferson Diehl de Oliveira, Júlio César Passos, Cees W. M. van der Geld |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Mass flux
Small tube Materials science Flow boiling 020209 energy General Chemical Engineering Flow (psychology) Aerospace Engineering 02 engineering and technology Heat transfer coefficient law.invention Physics::Fluid Dynamics chemistry.chemical_compound Propane law Heat transfer 0202 electrical engineering electronic engineering information engineering Spark plug Fluid Flow and Transfer Processes Mechanical Engineering Mechanics 021001 nanoscience & nanotechnology Flow patterns Boiling point Nuclear Energy and Engineering chemistry Heat flux 0210 nano-technology |
| Zdroj: | Experimental Thermal and Fluid Science, 96, 243-256. Elsevier |
| ISSN: | 0894-1777 |
| Popis: | Flow patterns and local heat transfer coefficients were investigated experimentally during flow boiling of R-290 in a tube with inner diameter equal to 1.0 mm. The tests were conducted at heat fluxes ranging from 5 to 60 kW/m2, mass flux from 240 to 480 kg/(m2s) at 25 °C saturation temperature. Both mass flux and heat flux have a significant influence on the heat transfer coefficient. A new flow pattern identification method is proposed, using non-dimensional parameters based on phase velocities and heat flux. The main flow patterns identified were bubbly, plug, slug, churn, wavy- and smooth-annular flow. Convective boiling was found to be predominant for most flow patterns. Moreover, the resulting heat transfer coefficients were compared with predicting correlations available in the literature. |
| Databáze: | OpenAIRE |
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