Thermal performance of (organic and inorganic) multi PCM Encapsulated systems

Abstract

one of the most active approaches to preserve solar energy is Latent heat storage with utilizing phase change materials (PCMs), and it can meaningfully decrease area for solar collectors. Phase change materials are isothermal in nature, and therefore provide greater density energy storage and the capability to work in a variable choice of conditions of temperature. The main objectives of the present work are to study the performance of multi capsules energy storage system that works with different phase change materials. Sodium Acetate Trihydrate, Stearic Acid and Paraffin Wax were used as PCMs inside multi-capsule system arranged in series based on their melting temperatures. The capsules were charged by three water flow rates of 0.5, 1 and 1.5 L/M that comes from a parabolic trough collector. The experimental results showed that the using of Staric Acid give the heat exchange capacity rate of the first and second capsules dropped to 974W/K and 447 W/K at 1 L/min and using a Paraffin gives the heat exchange capacity rate of the first and second capsules dropped to 223 W/K and 111 W/K at 0.5 L/min respectively.