The most common solar thermal collectors are flat plate and evacuated tube. A third, less common type, ____ concentrating, uses U shaped troughs to concentrate sunlight on a tube that is placed on the focal line of the trough.

Question

Quizplus · Accepted Answer

The correct term is "parabolic," as parabolic troughs are used to concentrate sunlight onto a focal point or line, which is a common design in solar thermal energy systems.

The Most Common Solar Thermal Collectors Are Flat Plate and Evacuated