| Titre : | Two-phase heat transfer and high-speed visualization of refrigerant flows in 100 × 100 μm2 silicon multi-microchannels (2013) |
| Titre original : | Transfert de chaleur diphasique et visualisation à grande vitesse de l'écoulement de frigorigènes à l'intérieur de microcanaux multiples en silicium d'une taille de 100 × 100 μm2 |
| Auteurs : | Sylwia Szczukiewicz, Auteur ; Navid Borhani, Auteur ; John Richard Thome, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | International journal of refrigeration (Vol. 36 N° 2 (N° spécial), Mars 2013) |
| Article en page(s) : | pp. 402–413 |
| Note générale : | Refrigeration |
| Langues : | Anglais |
| Tags : | Multi-microchannel evaporator ; Silicon chip ; Two-phase cooling ; Refrigerant ; Infra-red camera ; High-speed visualization |
| Résumé : | Two-phase flow boiling of R245fa, R236fa, and R1234ze(E) in 100 × 100 μm2 parallel microchannels for cooling of future 3D-ICs has been investigated. Significant flow instabilities, back flow, and non-uniform flow distribution among the channels were observed in the micro-evaporator without any inlet restrictions (micro-orifices). Therefore, to prevent such problems, rectangular restrictions were placed at the inlet of each channel and the two-phase flow flashed by the micro-orifices was identified as the most optimal operating condition. In the present study, a novel in-situ pixel-by-pixel technique was developed to calibrate the raw infra-red images, thus converting them into two-dimensional temperature fields of 10’000 pixels over the test section surface operating at 60 Hz. Tests showed that the base heat flux of 48.6 W cm−2 could be dissipated whilst keeping the micro-evaporator’s temperature below 85 °C. |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S0140700712003131 |
