The energy storage ability and temperature arrangement of a concrete bed which was charged and discharged at the same time was examined mathematically in this research. This was carried out by modeling a single globe-shaped concrete which was utilized to simulate a series of points along the concrete bed axis. Charging and discharging mode of the system were compared for 0.0094, 0.013, and 0.019 m3/s air flow rates. Higher change in temperature response was detected between the charging and fluid to solid heat transfer process at the inception of the concrete bed and the heat gain by the cool air flowing inside the copper tube was fairly high. The analysis of energy storage efficiency was also carried out and it was noticed that the globe-shaped concrete of 0.11 m diameter has the highest storage efficiency of 60.5% at 0.013 m3/s airflow rate.
Part of the book: HVAC System