Investigation On Heat Transfer Properties Of Water Based TiO2-ZnO Nanofluids

2nd International Conference on Advancements in Aeromechanical Materials for Manufacturing

航空航天工程;材料科学;机械制造

Chaitanya Lahari, M.L.R.^1 ; Sesha Talpa Sai, P.H.V.^2 ; Narayana Swamy, K.S.^1 ; Krishnamurthy, N.^3 ; Sharma, K.V.^4

School of Mechanical Engineering, REVA University, Bangalore, India^1

Department of Mechanical Engineering, Direct. R and D Malla Reddy College of Engineering and Technology, Secunderabad

500100, India^2

Vijaya Vittala Institute of Technology, Bangalore, India^3

Center for Energy Studies, Jawaharlal Nehru Technological University, Hyderabad, India^4

关键词: Double-pipe heat exchangers;    effectiveness;    Heat transfer applications;    Heat transfer performance;    Heat transfer properties;    Low thermal conductivity;    Nanofluids;    Thermal management systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/455/1/012092/pdf
DOI  :  10.1088/1757-899X/455/1/012092

来源: IOP

【 摘 要 】

Nanofluids in heat transfer applications exhibit effective performance over conventional heat transfer fluids. High thermal loads due to miniaturization in a wide variety of applications offers technological challenges in designing efficient thermal management systems. Traditional heat transfer fluids such as air, water, engine oil, and ethylene glycol (EG) have very low thermal conductivities of 0.03, 0.613, 0.145 and 0.253 W/mK respectively. The poor thermal conductivity of these fluids is an obstacle in improving heat transfer and compactness of the heat exchangers. Determination of properties of nanofluids and its performance in water based base fluids has been studied by many researchers. However the heat transfer performance of mixed nanofluids ie., hybrid nanofluids is yet to be explored. TiO2 and ZnO nanofluids were prepared at 0.5%, 1.5% and 2.0% volume concentration. Thermal conductivity estimated for temperature range of 30-70°C. Significant enhancement of both heat transfer rate and effectiveness of heat exchanger was noticed with TiO2 nanofluids at 2.0% volume concentration and with 1.5% volume concentration of TiO2-ZnO hybrid nanofluids.