Melting of hybrid nano-enhanced phase change material in an inclined finned rectangular cavity for cold energy storage

Laouer A., Teggar M., Tunçbilek E., Arıcı M., Hachani L., Ismail K. A.

JOURNAL OF ENERGY STORAGE, cilt.50, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 50
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.est.2022.104185
  • Dergi Adı: JOURNAL OF ENERGY STORAGE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Anahtar Kelimeler: Cold thermal energy storage, Fin, Hybrid nanoparticles, Lattice Boltzmann method, Phase change material, HEAT-TRANSFER, PERFORMANCE ENHANCEMENT, SOLIDIFICATION PROCESS, INCLINATION ANGLE, DISPLAY CABINET, PCM, CONVECTION, NANOFLUID, SYSTEM, FINS
  • Kocaeli Üniversitesi Adresli: Evet

Özet

The aim of this paper is to study the potential of two heat transfer enhancement techniques, namely adding fins and hybrid nanoparticle (Cu and Al2O3), for improvement of the melting process of PCM (water) in an inclined rectangular enclosure as model of cold energy storage systems. Phase change and heat transfer of PCM are modelled using an in-house built code based on Lattice Boltzmann Method, which is validated with experimental and numerical results from literature. Enhancement effect is investigated through the main parameters including number of fins, fin length ratio (W/H) and nanoparticle volume fraction (phi). Heat transfer and fluid flow, liquid fraction, transient evolution of melting front, required time for full melting, and thermal energy storage are analysed in detail. The results show that the melting rate is about two times higher for the fin length ratio of W/ H = 0.75, compared to W/H = 0.25. Besides, nanoparticle loading further enhances the melting rate. The highest melting rate is attained in the case of 3-fins and nanoparticle concentration of phi = 6 vol% with a 33.5% reduction in the complete melting time. Incrementing the fin length ratio increases the thermal energy stored, and the melting time can be shortened by up to 64%.