Solar for Dark Climates

July 8, 2009 | Source: Technology Review

A system developed by Cool Energy that produces heat and electricity from the sun could help make solar energy competitive with conventional sources of energy in relatively dark and cold climates.

The system combines a conventional solar water heater with a new Stirling-engine-based generator. In cool months, the solar heater provides hot water and space heating. In warmer months, excess heat is used to drive the Stirling engine and generate electricity.