Flash boiling from carbon foams for high-heat-flux transient cooling
| Autor: | Jeffrey D. Engerer, Timothy S. Fisher |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Convective heat transfer 020209 energy Thermodynamics chemistry.chemical_element 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Flux (metallurgy) Heat flux chemistry Boiling 0202 electrical engineering electronic engineering information engineering Transient (oscillation) 0210 nano-technology Carbon Nucleate boiling Steam explosion |
| Zdroj: | Applied Physics Letters. 109:024102 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.4958117 |
| Popis: | Flash boiling of a liquid pool results in an event characterized by rapid phase change and, as a result, high rates of expansion and cooling. Because of the potential advantages of such characteristics for convective heat transfer, flash boiling is considered here for the purpose of cooling transient heat loads. The event has the positive characteristics mentioned as well as rapid response (∼10 ms) and high initial rates of phase change, and then quickly decays to a steady-state regime analogous to pool boiling. The performance of the cooling mechanism is evaluated using an objective function derived from the effect of temperature on the efficiency of optical transmission in a diode-pumped solid-state laser. Statistical surrogate models based on the experimental results are used to predict optimal run conditions. Experiments using these predicted parameters show that flash boiling can maintain device temperature to within ±6.1 °C through a pulsed 5 s heat flux of 68 W cm−2 and to within ±1.4 °C for a heat... |
| Databáze: | OpenAIRE |
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