Paper Conference

Proceedings of eSim 2016: 9th Conference of IBPSA-Canada


Numerical parametric analysis of hybrid thermal energy storage system using phase change materials (PCMs) under indirect sequential charging and discharging

Mohamed Abdelsalam, James Cotton, Marilyn Lightstone

Abstract: Modular single-tank hybrid thermal energy storage (HES) system was numerically modeled to study its dynamic performance under indirect sequential charging/discharging cycles. A parametric analysis was conducted to investigate the effect of key parameters on the storage gain of the hybrid system compared to sensible energy storage (SES) system. The HES system was found to outperform the SES system but the storage gain was limited, mainly by the thermal resistance of the PCM. Reducing the thickness of the PCM modules from 60 mm to 10 mm yielded an increase of approximately 6 times in the storage gain. Also, close to 100% enhancement in the storage gain was obtained by using PCM with thermal conductivity of 2 W/m.K compared to that with 0.2 W/m.K. Systems with broad temperature ranges tended to store more energy as sensible heat in the PCM, which resulted in diminishing the storage gain.
Pages: 531 - 542