Akademik Veri Yönetim Sistemi
Journal of Energy Storage, cilt.85, 2024 (SCI-Expanded)
The charging and discharging processes were experimented by utilizing solar salt as phase change material (PCM) in a shell and tube heat exchanger where PCM is permeated and heat transfer fluid (HTF) is passed through spiral copper tubes inside the heat exchanger. Heat flux was varied to know about the change in melting time, whereas the flow rate of coolant was varied to study about the discharging of PCM. A vertical insert was used in a heat exchanger to upsurge convective heat transfer rate, and influence of the same on charging time was reported. Heat flux was perceived to be directly related to the charging of PCM. The amount of time needed to charge the PCM decreased as the heat flow rose. In our case, 70 and 180 min is the time taken to charge from ambient conditions with a heat flux of 3300 and 1800 W/m2, respectively, in the presence of vertical inserts. Solidification time was found to be 80 and 60 min when a flow rate of coolant was maintained at 1 and 3 l per minute, respectively. The effectiveness of a heat exchanger was found to be dependent on natural convection during latent heat release and conduction during sensible heat release. A higher heat flux of 3300 W/m2 was found to shorten the melting time, and an increasing coolant flow rate of 3 l per minute was shown to shorten the solidification time. The findings of the current work can be applied to high temperature-based energy storage applications, which require storing abundant heat with a shorter period of time.