An exergy analysis of a concentric tube heat exchanger using hBN-water nanofluids
Küçük Resim Yok
Tarih
2021
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Inder Science Publishers
Erişim Hakkı
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-ShareAlike 3.0 United States
Attribution-NonCommercial-ShareAlike 3.0 United States
Özet
This study investigated the effects of using nanofluids prepared with hexagonal boron nitride (hBN) nanoparticles on the thermal performance and pressure drop of a concentric tube heat exchanger. Experiments were carried out with water-hBN nanofluids for stable, dispersed, 0.01%, 0.1% and 1% volume concentrations, at different flow rates and Reynolds numbers under parallel and counter-flow conditions. When the experimental results were examined, the exergy loss was higher in the parallel-flow heat exchanger compared to the counter-flow heat exchanger. The highest exergy loss value was obtained for distilled water at the highest Reynolds number (Re = 8,700) for parallel flow operation at 170 W. The exergy loss of water at the highest Reynolds number (Re = 8,700) for parallel flow operation increased by 15.7%, 24.8% and 49.8% for hBN-water concentrations of 0.01%, 0.1% and 1%, respectively. Exergy loss of water at the highest Reynold number (Re = 8,700) for counter flow operation increased by 11.3%, 17.3% and 29.2% for hBN-water concentrations of 0.01%, 0.1% and 1%, respectively. When evaluating the exergy analysis of the system, exergy losses due to pressure drops were negligible for both flows (parallel and counter).
Açıklama
Anahtar Kelimeler
Hexagonal Boron Nitride-Water Nanofluid, Concentric Tube Heat Exchanger, Exergy Efficiency, Exergy Loss, Pump Power
Kaynak
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
35
Sayı
4
Künye
Budak Ziyadanoğulları, N., Perçin, S. (2021). An exergy analysis of a concentric tube heat exchanger using hBN-water nanofluids. International Journal of Exergy, 35 (4), pp.438-452. DOI: 10.1504/IJEX.2021.117050
