Experimental Investigation of Subcooled Flow Boiling in a Minichannel
| Autor: | Sarit K. Das, A.R. Balakrishnan, Muniyandi Venkatesan, Manoharan Aravinthan |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Tubes (components) Outlet temperature Thermodynamics Experimental heat transfer Stainless steel Predictive models Internal diameters Boiling Heat transfer Sub-cooled boiling Flow boiling Pressure drop Fluid Flow and Transfer Processes Mechanical Engineering Drop (liquid) Onset of nucleate boiling Condensed Matter Physics Subcooled flow boiling Subcooling Flow boiling heat transfer Drops Electric current Nucleate boiling Experimental investigations |
| Zdroj: | Heat Transfer Engineering. 36:408-417 |
| ISSN: | 1521-0537 0145-7632 |
| DOI: | 10.1080/01457632.2014.924070 |
| Popis: | The present work presents experimental results of subcooled flow boiling heat transfer phenomena in minichannels. The experiments were conducted with high surface tension liquid (water), which clearly indicates that inertial effects are important for both momentum and thermal transport in minichannels. The test section is a horizontal AISI 316 stainless-steel minitube with internal diameter of 1.13 mm with uniform heated length of 250 mm and the tube is heated by AC electric current. The variation in wall temperature and pressure drop gives an indication of the different boiling regions along the axis of the horizontal tube. Based on sudden oscillations of the pressure drop and wall temperature, onset of nucleate boiling (ONB) is identified in the tube. During ONB, pressure drop and the fluctuations of fluid outlet temperature are observed near the exit of the test section. Predictive models for ONB were evaluated and Kandlikar's ONB model was found to agree well with the present data. Comparisons of experimental heat transfer coefficient in the subcooled boiling regime with the existing correlations are also presented. � 2015 Copyright Taylor and Francis Group, LLC. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|