Study on High Performance Evaporator with Micro Grooves (Measurement of Capillary Force in Single Groove and Modeling of Heat and Mass Transfer)
| Autor: | Shigefumi Nishio, Ryo Shirakashi, Isao Hagiya |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B. 74:2190-2197 |
| ISSN: | 1884-8346 0387-5016 |
| Popis: | A micro-grooved evaporator is composed of μm-order width grooves on a heat transfer plate, in which the inter-line regions at the liquid-vapor meniscus of coolant become specific. The high heat performance are realized by this inter-line region where the liquid thin film reduces thermal resistance on the heat transfer surface. In this report, we proposed a numerical simulation model of heat and mass transfer in a single groove to predict the capillary force and the heat flux in a single groove. In addition, the capillary force performances (capillary-rise length in a groove) for a single groove of various width, superheat and inclination was measured. The measured capillary-rise length became maximum at a specific groove width of 200-400μm, which is in good agreement with the predicted results calculated by the proposed model. For the better prediction of capillary-rise length, effective capillary force and, especially, effective flow resistance were considered. |
| Databáze: | OpenAIRE |
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