مقاله انگلیسی عملکرد انتقال حرارت همرفتی نانوسیالات مبتنی بر روغن حرارتی در یک حلقه ترموهیدرولیک
Abstract
Keywords
Nomenclature
Introduction
Experimental section
Convective heat transfer coefficient (h)
Results and discussion
Conclusions
Declaration of competing interest
Acknowledgements
Appendix A. Supplementary data
Data availability
References
ABSTRACT
Enhancing the performance of heat transfer fluids (HTF) is a key target for improving the efficiency of many industrial processes. Employing nanofluids for this purpose, by dispersing nanoparticles into the initial HTF to improve its thermo-physical properties, is one possible way to increase its heat transfer capacity. However, testing these properties at high temperature is not always easy. An experimental setup consisting of a thermohydraulic loop for high-temperature heat transfer measurements was developed in this work. The accuracy and repeatability of the measurements taken in the heat transfer loop were ensured. A nanofluid consisting of a commercial thermal oil, doped with Sn nanoparticles at 1 wt% and olive oil surfactant used to enhance colloidal stability, was tested and compared to the results obtained for the base fluid and the base fluid/stabiliser mixture employing their experimentally measured thermo-physical properties. The nanofluid generally enhanced the convective heat transfer coefficient in relation to the base fluid with enhancements of up to 7.23% at 200 ◦C and 9.43% at 140 ◦C vs. the pure base fluid.