Open AccessSolidification characteristics of deionized water in a spherical capsule using bio-additives: An experimental study
Author(s) -
D Premnath,
P. Chandrasekaran,
L. R. Ganapathy Subramanian
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1130/1/012029
Subject(s) - subcooling , gelatin , materials science , phase change material , phase (matter) , capsule , starch , thermal energy storage , chemical engineering , phase change , chemistry , thermodynamics , boiling , organic chemistry , physics , botany , biology , engineering
The present work investigates the solidification activity of deionized water as phase change material dispersed with various bio-additives such as gelatin and corn starch in a spherical capsule immersed in a constant temperature bath. Tests are carried out at two different bath temperatures (-6°C and -9°C) and it was noted that deionized water undergoes a subcooling of -3.8°C at a bath temperature of -6°C. However, no subcooling is reported for the deionized water with a concentration of 0.1wt.% for both the additives. A maximum reduction of 51% and 45% in total solidification time is observed for gelatin solution at bath temperatures of -6°C and -9°C respectively. A significant reduction of 82% is observed while considering 50% of phase change material(PCM) mass at a bath temperature of -6°C. Hence, it is concluded that reducing subcooling and partial charging of water-based PCMs would help to increase the Cool Thermal Energy Storage (CTES) system’s energy efficiency.