| Autor: |
S. Sadeghipour, B. Rahmati, F.S. Javadi, M.M. Elias, M.R. Sohel, Rahman Saidur, G. BoroumandJazi |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
International Communications in Heat and Mass Transfer. 44:58-63 |
| ISSN: |
0735-1933 |
| DOI: |
10.1016/j.icheatmasstransfer.2013.03.017 |
| Popis: |
Improving heat exchanger's performance by increasing the overall heat transfer as well as minimising pressure drop is one of the promising fields of research to focus on. Nanofluids with higher thermal conductivity and better thermophysical properties can be applied in heat exchanger to increase the heat transfer rate. In the present study SiO 2 , TiO 2 and Al 2 O 3 are applied in a plate heat exchanger and the effects on thermophysical properties and heat transfer characteristics are compared with the base fluid. Since it is desired to minimize the pressure drop, the influence of nanofluid application on pressure drop and entropy generation is investigated. It is concluded that the thermal conductivity, heat transfer coefficient and heat transfer rate of the fluid increase by adding the nanoparticles and TiO 2 and Al 2 O 3 result in higher thermophysical properties in comparison with SiO 2 . The highest overall heat transfer coefficient was achieved by Al 2 O 3 nanofluid, which was 308.69 W/m 2 .K in 0.2% nanoparticle concentration. The related heat transfer rate was improved around 30% compared to SiO 2 nanofluid. In terms of pressure drop, SiO 2 shows the lowest pressure drop, and it was around 50% smaller than the pressure drop in case of using TiO 2 and Al 2 O 3 . |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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