Carbon nanoadditives to enhance latent energy storage of phase change materials
| Autor: | Kevin P. Hallinan, Shadab Shaikh, Khalid Lafdi |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Wax
Materials science Carbon nanofiber Enthalpy of fusion General Physics and Astronomy chemistry.chemical_element Nanotechnology Carbon nanotube law.invention Differential scanning calorimetry chemistry Chemical engineering law visual_art Latent heat Volume fraction visual_art.visual_art_medium Carbon |
| Zdroj: | Journal of Applied Physics. 103:094302 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.2903538 |
| Popis: | Latent energy storage capacity was analyzed for a system consisting of carbon nanoparticles doped phase change materials (PCMs). Three types of samples were prepared by doping shell wax with single wall carbon nanotubes (SWCNTs), multiwall CNTs, and carbon nanofibers. Differential scanning calorimetry was used to measure the latent heat of fusion. The measured values of latent heat for all the samples showed a good enhancement over the latent heat of pure wax. A maximum enhancement of approximately 13% was observed for the wax/SWCNT composite corresponding to 1% loading of SWCNT. The change in latent heat was modeled by using an approximation for the intermolecular attraction based on the Lennard-Jones potential. A theoretical model was formulated to estimate the overall latent energy of the samples with the variation in volume fraction of the nanoparticles. The predicted values of latent energy from the model showed good agreement with the experimental results. It was concluded that the higher molecular ... |
| Databáze: | OpenAIRE |
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