산화알루미늄 나노유체를 사용하는 이중관 나선형 열교환기의 열전달 특성에 관한 실험 연구
Experimental Study on Heat Transfer Characteristics of Double-pipe Spiral Heat Exchanger Using Aluminum Oxide Nano-fluid
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The heat transfer characteristics of double-pipe spiral heat exchanger using aluminum oxide nano-fluid were investigated by three different sizes of curvature size, experimentally. Five concentration of nano-fluid as working fluid were made and tested to analyze the heat transfer characteristics. As results, the heat transfer performance was improved at 0.25% of nano-fluid due to high thermal conductivity, however, as the concentration of nanofluid increased (~2.0%), the heat transfer performance deteriorated due to the increase in thermal resistance caused by the sedimentation of particles in the flow path. In addition, the nano-fluid has a higher pressure drop than water due to its high density and viscosity. The optimal range for heat transfer enhancement of nano-fluid was found to be less than 4.0 LPM in flow rate and 0.25% of nano-fluid concentration in this study.
Abstract
The heat transfer characteristics of double-pipe spiral heat exchanger using aluminum oxide nano-fluid were investigated by three different sizes of curvature size, experimentally. Five concentration of nano-fluid as working fluid were made and tested to analyze the heat transfer characteristics. As results, the heat transfer performance was improved at 0.25% of nano-fluid due to high thermal conductivity, however, as the concentration of nanofluid increased (~2.0%), the heat transfer performance deteriorated due to the increase in thermal resistance caused by the sedimentation of particles in the flow path. In addition, the nano-fluid has a higher pressure drop than water due to its high density and viscosity. The optimal range for heat transfer enhancement of nano-fluid was found to be less than 4.0 LPM in flow rate and 0.25% of nano-fluid concentration in this study.
참고문헌 (9)
- Heyhat M. M., "Experimental investigation of turbulent flow and convective heat transfer characteristics of alumina water nanofluids in fully developed flow regime", Int. Commun. Heat Mass Transf, 39, pp.1272~1278 (2012)
- Nasiri M., "Experimental heat transfer of nanofluid through an annular duct", Int. Commun. Heat Mass Transf, 38, pp.958~963 (2011)
- Sahin B., "Experimental investigation of heat transfer and pressure drop characteristics of Al2O3–water nanofluid", Exp. Therm. Fluid Sci, 50, pp.21~28 (2013)
- Vajjha R. S., "Development of new correlations for convective heat transfer and friction factor in turbulent regime for nanofluids", Int. J. Heat Mass Transf, 53, pp.4607~4618 (2010)
- Nam H. T., "Numerical Study of Flow and Heat Transfer Characteristics for Al2O3 Nanofluid in a Double-Pipe Helical Coil Heat Exchanger", Micromachines, 14, pp.2219~ (2023)
- Kumar Vimal, "Pressure Drop and Heat Transfer Study in Tube-in-Tube Helical Heat Exchanger", Chemical Engineering Science, 61(3), pp.4403~4416 (2006)
- Mahmoudi M., "Experimental and numerical investigation on forced convection heat transfer and pressure drop in helically coiled pipes using TiO2", water nanofluid, 2017, pp.74, 627~643
- Kum S. M., "Experimental study on heat transfer characteristics of double-pipe spiral heat exchanger with various curvature", J. Korean Soc. Mech. Technol, 25(6), pp.1091~1097 (2023)
- Dravid Arun Nilkanth, "Effect of Secondary Fluid Motion on Laminar Flow Heat Transfer in Helically Coiled Tubes", AIChE Journal, 17(5), pp.1114~1122 (1971)