The Effect of an Air-Supply Guide Vane with Periodic Swing on the Indoor Air Distribution
| Autor: | Wen-Hao Chen, 陳文豪 |
|---|---|
| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 The main purpose of air-conditioning is to provide comfort and appropriate indoor air quality. One of the main tasks of air-conditioning is to control the air temperature and flowing pattern within an acceptable level in order to remove heat from the space. Using a jet to induce air into the space with periodically-swinging fin, the mobility of the air can be increased and hence the heat in the occupied zones can be removed by the jet of cold air. This study uses FLUENT 6.3, which is commercial flow analysis software, to analyze the main factors affecting the air flow distribution under the effect of swinging fin. When the sweeping angles of the fin are large, the air flow splits, causing the eddy current to grow with greater turbulence intensity and hence enhance better turbulent mixing in the space. Finally through the flow pattern analysis and temperature distribution analysis, it is observed that the air stream will flow along the bottom face of the space towards the exit. Most heat is removed through advection carried by this flow. Meanwhile, the room air and part of the jet flow will flow along the ceiling and right wall and then re-circulated back to the jet. This phenomenon increases the mobility as well as heat transfer of the room air and provides excellent mixing effect of the air streams. Hence, a certain level of uniformity of the room air temperature can be assured. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|