Technical analysis and optimization of a high concentrating photovoltaic power tower

Based on the results of previous research, a technical study on a 1 MW prototype photovoltaic power tower is presented in this contribution. Some options to optimize the heliostat field were assessed to improve the optical efficiency and yearly energy output. Aiming strategies to create a highly homogeneous radiant flux distribution on the PV receiver and additional optimization options were analyzed. A significant improvement compared to earlier results and an annual mean optical efficiency of 54.7 % was achieved. The cost calculation for the improved system resulted in levelized cost of electricity (LCOE) of 0.19 e/kWh for the exemplary location Seville, Spain. Assumptions for further improvements and heliostat field cost reduction showed an additional cost reduction potential to 0.08 e/kWh.