Pool Boiling Heat Transfer on structured Surfaces

7th European Thermal-Sciences Conference

Addy, J.^1 ; Olbricht, M.^1 ; Müller, B.^1 ; Luke, A.^1

Institute of Technical Thermodynamics, University of Kassel, Kurt-Wolters-Strae 3, Kassel

34125, Germany^1

关键词: Heat and mass transfer;    Nucleate pool boiling;    Pool boiling heat transfer;    Reduced pressure;    Structured surfaces;    Thermal component;    Thermal devices;    Working fluid;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/745/3/032077/pdf
DOI  :  10.1088/1742-6596/745/3/032077

来源: IOP

【 摘 要 】

The development in the process and energy sector shows the importance of efficient utilization of available resources to improve thermal devices. To achieve this goal, all thermal components have to be optimized continuously. Various applications of multi-phase heat and mass transfer have to be improved. Therefore, the heat transfer and the influence of surface roughness in nucleate boiling with the working fluid propane is experimentally investigated on structured mild steel tubes, because only few data are available in the literature. The mild steel tube is sandblasted to obtain different surface roughness. The measurements are carried out over wide ranges of heat flux and pressure. The experimental results are compared with correlations from literature and the effect of surface roughness on the heat transfer is discussed. It is shown that the heat transfer coefficient increases with increasing surface roughness, heat flux and reduced pressure at nucleate pool boiling.