An Overview of One-Sun Solar Thermal Technology
An Overview of One-Sun Solar Thermal Technology
An Overview of One-Sun Solar Thermal Technology
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Further Classification Dimensions<br />
• Collector<br />
– Glazings (for flat-plate @ atmospheric pressure)<br />
– Unglazed<br />
» Can be used for pool, domestic hot water, and space heating<br />
» Not common in solar water heaters<br />
– <strong>One</strong> glazing (most common)<br />
– Multiple glazings (rare)<br />
– Surface coatings<br />
– Non-selective: high solar absorption and high infrared loss<br />
– Selective: high solar absorption and low infrared loss<br />
» Thin IR-transparent coating on IR-reflective substrate<br />
» IR-reflective elements in paint mixture<br />
– Evacuated tubes<br />
– Rare in the US; dominant in China<br />
– May become common in US?<br />
SEET <strong>Solar</strong> <strong>Thermal</strong> Seminar 7/26/07
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