Material screening and compatibility for thermocline storage systems using thermal oil

Review on sensible thermal energy storage for industrial solar applications and sustainability aspects

“…But, due to the high cost of mineral oil, researchers focused on low cost thermal energy storage materials (Emerson, 2013). Molina et al (2019) studied alternative cheap solid materials that can be used instead of thermal oil. Silica sand, natural rock, glass, steel, aluminia, quartzite and concrete were suggested as alternative storage materials up to 350 °C.…”

Long‐term stability of sensible thermal energy storage materials developed from demolition wastes interacting with hot heat transfer fluid

“…Mafic rocks, felsic rocks, serpentinite, and quartz-rich conglomerates were found as thermally and mechanically stable under air flow between 100 C and 600 C. Li et al 37 investigated the effects of thermal cycles on mechanical stability of granite and revealed that thermal cracks occur in the first cycle and slightly increase with thermal cycles. Molina et al 3 performed ageing and compatibility test to various natural solid materials in Jarytherm DBT oil at 340 C for 500 hours. Glass, steel, and alumina were determined as potential solid materials that can be used in direct contact with oil.…”

“…1,2 Solid STESMs such as silica sand, natural rock, glass, steel, alumina, quartzite, and concrete were suggested as alternative low-cost STESMs instead of molten salt and mineral oil for hightemperature applications. [3][4][5] There are several studies in literature showing that such solid STESMs have good storage performance for high-temperature TES applications. Although their specific heat capacities ranging from 500 to 1300 Jkg À1 C À1 are not very high, they have excellent thermal conductivities; 1.0 to 3.0 Wm À1 K À1 for rock, concrete, basalt and 30 to 40 Wm À1 K À1 for ferrous alloys.…”

“…Recent studies focus on using packed‐bed TES tank filled with solid packing to provide several benefits such as reducing the usage of mineral oil and molten salts as liquid, overall cost reduction potential, simple design, and environmentally friendliness 1,2 . Solid STESMs such as silica sand, natural rock, glass, steel, alumina, quartzite, and concrete were suggested as alternative low‐cost STESMs instead of molten salt and mineral oil for high‐temperature applications 3‐5 . There are several studies in literature showing that such solid STESMs have good storage performance for high‐temperature TES applications.…”

Benchmarking study of demolition wastes with different waste materials as sensible thermal energy storage

“…Main advantages of using natural materials are: a) abundance and low-cost, b) suitability for high temperature applications, c) mechanical and thermal stability, d) no reaction with HTF in direct use [18]. Alumina is another alternative storage material, which can be used directly as aluminum beads or as composite material [2,19,20,21]. Compared with rocks, alumina has higher thermal conductivity, this brings shorter charge and discharge time.…”