Aerogel-based solar thermal receivers

作者：McEnaney Kenneth; Weinstein Lee; Kraemer Daniel; Ghasemi Hadi^*; Chen Gang^*

来源：Nano Energy, 2017, 40: 180-186.

DOI：10.1016/j.nanoen.2017.08.006

• Solar receiver
• Solar thermal
• Aerogel

In any solar thermal application, such as solar space heating, solar hot water for domestic or industrial use, concentrating solar power, or solar air conditioning, a solar receiver converts incident sunlight into heat. In order to be efficient, the receiver must ideally absorb the entire solar spectrum while losing relatively little heat. Currently, state-of-the-art receivers utilize a vacuum gap above an absorbing surface to minimize the convection losses, and selective surfaces to reduce radiative losses. Here we investigate a receiver design that utilizes aerogels to suppress radiation losses, boosting the efficiency of solar thermal conversion. We predict that receivers using aerogels could be more efficient than vacuum-gap receivers over a wide range of operating temperatures and optical concentrations. Aerogel-based receivers also make possible new geometries that cannot be achieved with vacuum-gap receivers.

• 出版日期2017-10
• 单位MIT