Info: SolarMission Technologies (www.solarmissiontechnologies.com) and its Australian subsidiary, EnviroMission Limited (www.enviromission.com.au) produced this 5 minute video on the pilot plant in Spain. It is an older video (2000) but gives a decent understanding of the solar tower concept. The designs have changed and technologies added, but it gives an introduction to the solar tower concept.
EnviroMission, Ltd. (US Symbol: EVOMY, Australian Stock Exchange: EVM) is a renewable energy developer of sustainable "green" energy solutions for the energy market. EnviroMission aims to be one of the world's leading producers of clean renewable energy. EnviroMission holds the proprietary rights to Solar Tower technology, a large-scale renewable energy technology based on simple fundamentals of physics -- hot air rises. Solar Tower technology has the potential to offer competitive renewable energy with equal reliability to fossil fuel generators.