@article{article_577918, title={Size Effect of Graphene Nanoparticles on the Thermal Properties of the Doped Phase Change Materials}, journal={Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi}, volume={6}, pages={123–134}, year={2019}, DOI={10.35193/bseufbd.577918}, author={Temel, Ümit Nazlı and Erdiş, Eyüp}, keywords={FDM,Isıl İletkenlik,Boyut Etkisi,Grafen Nanoparçacık}, abstract={<span lang="en-au" style="font-size:9pt;font-family:’Times New Roman’, serif;color:#000000;" xml:lang="en-au"> <span style="font-size:14px;">In this study, the size effects of the Graphene
nanoparticles (GNP) doped into a paraffin type organic phase change material
(PCM) on thermal properties were examined. The thermal conductivities,
melting/solidification temperatures and melting/solidification latent heats of
the GNP/PCM composites, which were obtained by incorporating GNP nanoparticles
with three different sizes into an organic PCM in mass fractions of 1%, 3% and
5%, were measured. The changes obtained in thermal properties were determined by
referring to the non-doped PCM data. The results obtained showed that in low
PCM mass fractions, thermal conductivity enhancement was a function of both
surface area and thickness of the GNP nanoparticles. In addition, it was
determined that thicker nanoparticles formed a more efficient conduction
network at high PCM fractions. The reflections of the enhancements obtained in
thermal conductivity on thermal performance were also determined in the study. </span> <span style="font-size:14px;">  </span> </span> <span lang="en-au" style="font-family:’Times New Roman’, serif;font-size:14px;" xml:lang="en-au">Enhancements in thermal
conductivity depending on the increase in thickness of GNP were obtained as 6.3%,
107.5% and 113.7% for 5% GNP(1-5nm)/ PCM, 5% GNP(6-8nm)/PCM and 5% GNP(11-15nm)/PCM
composites, respectively. These thermal conductivity enhancements resulted
performance increase in the energy storage unit around 5.5%, 18.3% and 20%
respectively. </span> <span style="font-size:14px;"> </span>}, publisher={Bilecik Şeyh Edebali Üniversitesi}