Abstract
This paper presents the results of an experimental study of heat transfer in a pool boiling evaporator with porous insert. Different types of graphite foams were tested with the phase change coolant FC-72 in a designed thermosyphon. Comparisons between the graphite foams and a solid copper block show that the porous structure enhances pool boiling significantly. The boiling thermal resistance of the tested graphite foams was found to be about 2 times lower than that of the copper block. The bubble formation recorded by a high speed camera indicates that boiling from a graphite foam is more vigorous than from a copper block. The designed thermosyphon with graphite foam insert can remove heat fluxes of up to 112 W/cm2 with the maximum heater temperature maintained below 100°C.
| Original language | English |
|---|---|
| Title of host publication | Diffusion in Solids and Liquids VI |
| Subtitle of host publication | Mass Transfer - Heat Transfer - Microstructure and Properties - Nanodiffusion and Nanostructured Materials |
| Publisher | Trans Tech Publications Ltd |
| Pages | 352-357 |
| Number of pages | 6 |
| Volume | 312-315 |
| ISBN (Print) | 9783037851173 |
| DOIs | |
| Publication status | Published - 2011 |
| Externally published | Yes |
Keywords
- Bubble formation
- Graphite foam
- Pool boiling
- Superheat
- Thermal resistance
ASJC Scopus subject areas
- Radiation
- General Materials Science
- Condensed Matter Physics