Heat storage system for air conditioning purpose considering melting in existence of nanoparticles

• Published in: Journal of energy storage 2022-11, Vol.55, p.105408, Article 105408
• Main Authors: Li, Z., Othman, Hakeem A., Alzubaidi, Alia M., Saad, Hosam A., Zhang, Yuelei, Hu, Chenggang, Alghawli, Abed Saif
• Format: Article
• Language: English
• Subjects: Charging; FVM; Melting time; MWCNT nanoparticles; PCM; Unsteady phase change process
• ISSN: 2352-152X; 2352-1538
• DOI: 10.1016/j.est.2022.105408

Mixture of MWCNT nanoparticles and paraffin with melting point of 24.5 °C has been utilized for saving the energy inside the ventilating system. The utilized duct for transportation of air has various tubes containing the paraffin and four styles for such obstacles have been presented. Finite volume method for modeling the melting procedure was utilized and validation test based on previous numerical article indicated good accommodation. Temperature of system at t = 0 is 6.5 °C less than 24.5 °C and hot laminar air flow with temperature of 14 K greater than initial temperature makes the paraffin to melt. With adding MWCNT nanoparticles the required time of charging reduce from 7.015 h to 6.74 h when DR = 0.16 which is associated with promising influence of such particles in augmentation of heat absorption. Moreover, as diameter of tube changes from 9.7 cm to 5 cm, the melting time declines from 6.74 h to 4.12 h. The needed time of process declines around 58.7 % with utilizing smaller tubes in existence of nanoparticles. •Mixture of MWCNT nanoparticles and paraffin was used in ventilating system.•Finite volume method for modeling the melting procedure was utilized.•Required time of charging reduce from 7.015 h to 6.74 h with adding additives.•The needed time of process declines around 58.7 % with utilizing smaller tubes.