n this paper, a literature review on thermocline storage performance for Con-centrating Solar Power (CSP) plant storage systems has been conducted. Theefficiency of materials to store heat depends on the storage process like sensi-ble heat storage, latent heat storage and thermochemical one and also on theirproperties. This study has been focused on sensible heat storage materials es-pecially thermocline storage system (DMT) using eco-materials which has ahigh potentiality (35%) to reduce CSP cost. There is a possibility to use natu-ral rocks, industry waste and to develop also materials for a thermocline sto-rage within a bed called packed bed using one tank. The thermal storage ma-terials should have some optimum parameters (particle diameter less than 2cm and good thermo-physical properties) to achieve better thermal storageperformance (thermal cycle efficiency, extraction factor). However, the sizeand the shape of natural rocks are uncontrollable (big diameter) and candrive to thermocline degradation, catastrophic thermal ratcheting and poorthermal stratification due to the variability of the storage system porosity andthe stress on the storage tank wall. Also a better thermal storage efficiency isachievable at low velocity and with good thermo-physical properties of theHTF. The ratio H/D, the height, the porosity, the shape and the position ofthe tank should be optimized to increase the storage efficiency

Thermocline Storage, Storage Effectiveness, Storage Materials