Low-tech Magazine

The bright future of solar powered factories

Most of the talk about renewable energy is aimed at electricity production. However, most of the energy we need is heat, which solar panels and wind turbines cannot produce efficiently. To power industrial processes like the making of chemicals, the smelting of metals or the production of microchips, we need a renewable source of thermal energy. Direct use of solar energy can be the solution, and it creates the possibility to produce renewable energy plants using only renewable energy plants, paving the way for a truly sustainable industrial civilization.

The ugly side of solar panels

New research shows, albeit unintentional, that generating electricity with solar panels can also be a very bad idea. In some cases, producing electricity by solar panels releases more greenhouse gases than producing electricity by gas or even coal.

(Picture: Sungazer)

Solar powered cars

If racing cars can drive on solar energy, then why do normal cars still need fossil fuels?

Around 30 cars race 3,000 kilometres across the Australian continent in the “World Solar Challenge”. Solar cars are electric vehicles that generate their own electricity, by means of around 6 m² of solar panels installed on their bodywork, and a series of linked up batteries that serve as a fuel tank. If we want the car to survive in the longer term, it should become slower and lighter again, trimmed to the efficiency of solar panels and batteries. (Picture: Venturi Astrolab)