Vacuum enclosures for solar thermal panels Part 2: Transient testing with an uncooled absorber plate

摘要

Creating a vacuum ( 1 Pa) around a solar absorber in a flat plate solar thermal collector can increase efficiency by minimising gaseous conduction and convection between the absorber plate and the glass cover. High performance and architecturally attractive flat plate solar thermal collectors are appealing to building owners and designers for supplying clean and renewable energy cost effectively produced via the facade of the building.