Study on some aspects of solar photo voltaic thermal storage: A review

Abstract

In the recent times energy crises is increasing specially in the developing nations where dependency on fossil fuels as their prime source which mainly includes oil, coal & gas energy emissions which are exhaustible in nature which leads to increase in greenhouse gases.As solar energy varies in nature with time of day and day of the year, direct solar radiations can now be stored using PV modules in many parts of the world. As a result, solar energy storage has been brought into solar power to eliminate these types of impediments. Review study mainly focuses on thermal properties of various Phase Change materials, air and water collector and its combination. PV module are often further utilized in several ways to achieve better efficiency. Furthermore, the utilization of the newest technologies like Nano fluids as well as phase change materials performance of the system is enhanced.Here our main focus is on solar energy storage because sun is an unlimited source of energy and maximum utilization can be done that’s why it is widely growing so in coming years it will acquire energy sector so installation costs can be recovered.Conclusion of the review study deals that with a concentration of 0.3 vol% of Nano fluid, thermal efficiency of hybrid PV/T, flat plate, and evacuated-tube solar collectors has increased by up to 96.3%, 95.13%, and 93.42%, respectively which depends on mass flow rate and temperature variation. Practically we can attain thermal efficiency (ηth) = 56.19% and electrical efficiency (ηele) = 13.75% after hybridization.