大象传媒

Enough sunlight falls on the Earth every minute to meet the world's energy demands for an entire year. Engineers at a solar plant in Spain explain how they can harness this energy. Hundreds of mirrors are used to reflect sunlight to a receiver on a central tower. Here water is heated to create steam, which drives a turbine and generates electricity. We also learn about a second system using parabolic reflectors, and about new ways to store heat to increase the useful output from the power plant.