Investigation Of Heat Transfer Augmentation In A Tube With Different Modified Twisted Tape Inserts Under The Same Conditions
Abstract
The swirl flow devices like twisted tape, winglet, groove, conical ring, wire coil etc. have been used as passive heat transfer augmentation technique. Especially, twisted tape devices have been applied in thermal engineering systems such as boilers, heat exchangers, water heater. Many researches using swirl flow devices particularly twisted tape with different geometries for heat transfer enhancement have been published. In this paper, different modified twisted tapes which had examined in previous studies were compared with each other with regard to heat transfer augmentation. Heat transfer, friction factor and thermal-hydraulic performance factor characteristics were investigated separately under the same conditions such as same twisted ratios and same Reynolds number values. Twisted tape which gives best heat transfer and friction factor results was determined. Derived empirical correlations which had been found by researchers were used for comparison between twisted tapes. ayrı ayrı incelenmiştir. En iyi ısı transfer ve sürtünme faktörü değerlerini veren burgu eleman belirlenmiştir. Araştırmacılar tarafından bulunmuş türetilen denklemler burgu elemanların kıyaslanması için kullanılmıştır
Keywords
References
- [1] Bejan, A. and Kraus, D., (2003). Heat Transfer Handbook, John Wiley & Sons, Inc., New Jersey.
- [2] Sachdeva, G., (2010). Computation of Heat Transfer Augmentation in a Plate-Fin Heat Exchanger Using Rectangular/Delta Wing, Doctoral Thesis, Department of Mechanical Enginnering National Institute of Technology, India.
- [3] Eiamsa-ard, S., Yongsiri, K., Nanan, K. and Thianpong, C., (2012). Heat transfer augmentation by helically twisted tapes as swirl and turbulence promoters, Chemical Engineering and Processing: Process Intensification, 60, pp. 42-48.
- [4] Eiamsa-ard, S., Thianpong, C. and Eiamsa-ard, P., (2010). Turbulent heat transfer enhancement by counter/co-swirling flow in a tube fitted with twin twisted tapes, Experimental Thermal and Fluid Scinence, 34, pp. 53-62.
- [5] Güneş, S., Özceyhan, V. and Büyükalaca, O., (2010). The expreimental investigation of heat transfer and pressure drop in a tube with coiled wire inserts placed separately from the tube wall, Applied Thermal Engineering, 30, pp. 1719- 1725.
- [6] Bas, H. and Ozceyhan, V., (2012). Heat transfer enhancement in a tube with twisted tape inserts placed seperately from the tube wall, Experimental Thermal and Fluid Science, 41, pp.51-58.
- [7] Promvonge, P., Pethkool, S., Pimsarn, M. and Thianpong, C., (2012), Heat transfer augmentation in a helical-ribbed tube with double twisted, International Communication in Heat and Mass Transfer, 39, pp. 953-959.
- [8] Gurlek, G., (2012), Experimental and numerical investigation of the effects of different turbulator geometries in pipe on thermal-hydraulic performance, Doctoral Thesis, Department of Mechanical Enginnering, Ege University, Turkey, (in Turkish).
AYNI ŞARTLAR ALTINDA BORU İÇİNDE FARKLI TİP BURGU ELEMANLARIN ISI TRANSFER İYİLEŞTİRMESİNİN İNCELENMESİ
Abstract
Burgu eleman, kanatçık, oluk, konik halka, tel sargı vb. gibi girdap akış cihazları
pasif ısı transferi iyileştirme teknikleri olarak kullanılmaktadır. Özellikle, burgu elemanlar,
kazan, ısı değiştiricisi, su ısıtıcı gibi ısıl mühendislik sistemlerinde uygulanmaktadır. Isı
transferini iyileştirmek için farklı geometrilerdeki burgu elemanlar kullanılan birçok
araştırma yayınlanmıştır. Bu çalışma kapsamında daha önce yapılan çalışmalarda
kullanılan farklı tasarlanan burgu elemanlar, ısı transfer iyileştirmesi bakımından
birbirleri ile karşılaştırılmıştır. Benzer burulma oranları ve benzer Reynolds sayıları gibi
aynı koşullar altında ısı transferi, sürtünme faktörü ve ısıl hidrolik performans değerleri ayrı ayrı incelenmiştir. En iyi ısı transfer ve sürtünme faktörü değerlerini veren burgu
eleman belirlenmiştir. Araştırmacılar tarafından bulunmuş türetilen denklemler burgu
elemanların kıyaslanması için kullanılmıştır.
Keywords
References
- [1] Bejan, A. and Kraus, D., (2003). Heat Transfer Handbook, John Wiley & Sons, Inc., New Jersey.
- [2] Sachdeva, G., (2010). Computation of Heat Transfer Augmentation in a Plate-Fin Heat Exchanger Using Rectangular/Delta Wing, Doctoral Thesis, Department of Mechanical Enginnering National Institute of Technology, India.
- [3] Eiamsa-ard, S., Yongsiri, K., Nanan, K. and Thianpong, C., (2012). Heat transfer augmentation by helically twisted tapes as swirl and turbulence promoters, Chemical Engineering and Processing: Process Intensification, 60, pp. 42-48.
- [4] Eiamsa-ard, S., Thianpong, C. and Eiamsa-ard, P., (2010). Turbulent heat transfer enhancement by counter/co-swirling flow in a tube fitted with twin twisted tapes, Experimental Thermal and Fluid Scinence, 34, pp. 53-62.
- [5] Güneş, S., Özceyhan, V. and Büyükalaca, O., (2010). The expreimental investigation of heat transfer and pressure drop in a tube with coiled wire inserts placed separately from the tube wall, Applied Thermal Engineering, 30, pp. 1719- 1725.
- [6] Bas, H. and Ozceyhan, V., (2012). Heat transfer enhancement in a tube with twisted tape inserts placed seperately from the tube wall, Experimental Thermal and Fluid Science, 41, pp.51-58.
- [7] Promvonge, P., Pethkool, S., Pimsarn, M. and Thianpong, C., (2012), Heat transfer augmentation in a helical-ribbed tube with double twisted, International Communication in Heat and Mass Transfer, 39, pp. 953-959.
- [8] Gurlek, G., (2012), Experimental and numerical investigation of the effects of different turbulator geometries in pipe on thermal-hydraulic performance, Doctoral Thesis, Department of Mechanical Enginnering, Ege University, Turkey, (in Turkish).
Details
| Primary Language | Turkish |
|---|---|
| Journal Section | Articles |
| Authors | |
| Publication Date | July 1, 2013 |
| Published in Issue | Year 2013 Volume: 9 Issue: 2 |