UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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Conference: Bucharest University Faculty of Physics 2018 Meeting


Section: Physics and Technology of Renewable and Alternative Energy Sources


Title:
Thermal Performance Of (Ni) Nanoparticles-Enhanced Paraffin As Phase-Change Material


Authors:
Farqad SAEED, Widad ALBANDA, Muhammad AL-TIMIMI, Mustafa Zaid ABDULLAH, Ioan STAMATIN, Adriana BALAN


*
Affiliation:
University of Bucharest, Faculty of Physics, 3Nano-SAE Research Centre, 405 Atomistilor str., PO Box MG-38, Bucharest-Măgurele, Romania


E-mail
farqad.rasheed@gmail.com


Keywords:
thermal energy storages, phase change materials (PCMs), thermal conductivity, latent heat, Ni nanoparticles.


Abstract:
Thermal energy storage systems can be considered a consistent solution to adjust the discrepancy between peak of energy and demands associated with most renewable energy sources. Among them, latent heat storage systems using phase change materials (PCMs) are an effective way to store thermal energy. Paraffin waxes are a family of saturated hydrocarbons commonly used as PCM. They are stable, nontoxic and noncorrosive materials, with large latent heat and moderate thermal energy storage density, but they have a low thermal conductivity as major drawback. Therefore, an experimental study is conducted in order to determine the effect of adding Nickel nanoparticles on paraffin thermal performances. Nickel nanoparticles were synthesized by precipitation method and added in 0.5-10 wt. % ratios to paraffin. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were employed for Nickel nanoparticle investigation. Thermal behavior in terms of melting and solidification temperatures/ enthalpies and specific heat capacities of solid and liquid paraffin composites was determined by differential scanning calorimetry (DSC). On the other hand, heat transfer rate was also studied with different Ni nanoparticles loading. Rectangular test rig was designed specially to test the impact of Ni nanoparticles on heat transfer rate. Results prove latent heat can be improved at specific ratios of Ni nanoparticles, on the other hand heat transfer rate improved gradually with increasing the Ni nanoparticles ratios, also the velocity of melting front phase have been calculated and recorded an increasing with nanoparticles addition. The presented results make the Ni nanoparticle a good candidate to be used for thermal behavior improvement of thermal energy storage applications.


Acknowledgement:
Acknowledgements This work was supported by the Ministry of Science and Technology of Iraq and by the Romanian Space Agency, Star Program, project no. 134/2017.