Riyadh Makki Hashim. “Numerical Study of Phase Change Material Thermal Performance During Melting Process at a Vertical Double Pipe Latent Heat Thermal Energy Storage Unit Having Conical Inner Pipe”. Design Engineering (August 9, 2021): 7706- 7717. Accessed April 27, 2024. http://thedesignengineering.com/index.php/DE/article/view/3281.