power (solar) tower
Power tower system. Image courtesy of SunLabs, DOE.
A power tower, also known as a central receiver solar power plant, is a type of concentrating collector system that employs a field of large mirrors that follow the Sun's path across the sky. The mirrors concentrate sunlight onto a receiver on top of a high tower. A computer keeps the mirrors aligned so the reflected rays of the Sun are always aimed at the receiver, where temperatures well above 1000°C can be reached. High-pressure steam is generated to produce electricity.