Hotter Solar Energy

Technology Review
March 15, 2011

Solar thermal power plants that produce hotter steam can capture more solar energy. That's why Siemens is exploring an upgrade for solar thermal technology to push its temperature limit 160 °C higher than current designs. The idea is to expand the use of molten salts, which many plants already use to store extra heat. If the idea proves viable, it will boost the plants' steam temperature up to 540 °C—the maximum temperature that steam turbines can take.
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