Heat Transfer Enhancement of the Air-Cooling Tower with Rotating Wind Deflectors under Crosswind Conditions
| Autor: | Dongtai Han, Xueping Du, Qiangmin Zhu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
020209 energy
Airflow air cooling tower heat transfer rate air flow rate rotating wind deflector crosswind 02 engineering and technology lcsh:Technology lcsh:Chemistry 0202 electrical engineering electronic engineering information engineering General Materials Science Cooling tower Instrumentation lcsh:QH301-705.5 Physics::Atmospheric and Oceanic Physics Fluid Flow and Transfer Processes Air cooling lcsh:T Process Chemistry and Technology Heat transfer enhancement General Engineering Mechanics Wind direction lcsh:QC1-999 Computer Science Applications lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 Heat transfer Environmental science lcsh:Engineering (General). Civil engineering (General) Tower lcsh:Physics Crosswind |
| Zdroj: | Applied Sciences; Volume 8; Issue 4; Pages: 544 Applied Sciences, Vol 8, Iss 4, p 544 (2018) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app8040544 |
| Popis: | To investigate the effect of wind deflectors on air flow and heat transfer performance of an air-cooling tower under crosswind conditions, an experimental system based on a surface condenser aluminum exchanger-type indirect air-cooling tower is established at a 1:100 proportional reduction. A 3-D computational fluid dynamics simulation model is built to study the air flow and temperature fields. The air flow rate into the cooling tower and the heat transfer rate of the radiators are used to evaluate cooling performance. Rotating wind deflectors are adopted to reduce the influence of crosswind on the cooling tower performance. The effects of the rotating wind deflectors on the thermal-hydraulic characteristics of the air-cooling tower under different environmental crosswind speeds are studied. Results indicate that the wind direction in the tower reverses as the rotating speed of the wind deflectors increases. The thermal performance of an air-cooling tower under crosswind conditions can be improved by using rotating wind deflectors. The heat transfer rate of a cooling tower with eight wind deflectors begins to increase when the rotating speed exceeds 2 r/min. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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