Finite element modeling of energy storage materials alumina using heat recovery in packed pebble bed heat exchanger

• Published in: Materials today : proceedings Vol. 45; pp. 1872 - 1877
• Main Authors: Benjamin Franklin, S., Karthikeyan, I., Ramesh, K.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2021
• Subjects: Alumina pebbles; Heat transfer; Pebble bed heat exchanger; Porous media; Sensible heat storage; Porous media; Pebble bed heat exchanger; Sensible heat storage; Alumina pebbles; Heat transfer
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2020.09.074

The studies of thermal energy storage material Alumina (Al2O3) as a function of average bed temperature. Aluminum oxide is engineering properties and uses commercially available. Alumina is one of the most cost-effective and widely used materials in the family of ceramics. The raw materials, from which this high-performance technical grade ceramic is made aluminum oxide, commonly referred to as alumina high strength characteristics of the material. Aluminum oxide is used in the energy storage of heat exchanger. The Al2O3 pebbles are 6 mm to 14 mm and are randomly dumped and packed in a 450 mm long hollow tube of 45 mm inner diameter. The tube was fully covered the asbestos ropes to reduce the heat loss. Hot air from a source was used to flow in the packed bed at various inlet conditions of velocity varying from 2 to 3 m/s. The spheres were heated from an inlet temperature of 32 °C. The experimental work was done in the heat exchanger is given to air in the multistage compressor and diesel engine exhaust. Waste heat energy was stored in the pebbles. The experimental results indicated that the increased porous media temperature increased the outer surface temperature, increased the heat transfer rate with an increase in the average bed temperature of 342 K to 402 K. The entire results obtained by using experimentation were cross verified using Finite Element Analysis modeling. Finally the results of both experimental and Finite Element Analysis Modeling were found to be in good co-relation.