精选优质文档-倾情为你奉上Better Solar Energy Systems: More Heat, More LightSolar photovoltaic thermal energy systems1, or PVTs, generate both heat and electricity, but until now they2 havent been very good at the heat-generating part compared to a stand-alone3 solar thermal collector. Thats because they operate at low temperatures to cool crystalline silicon solar cells4, which5 lets the silicon generate more electricity but isnt a very efficient way to gather heat.Thats a problem of economics
