Selective surface: Difference between revisions
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Added [http://www.bcas.net/Publication/EnergyNewsletter/Document/2003-5.PDF] link - Yossarian4010 |
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==External links]== |
==External links]== |
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*[http://www.finishing.com/104/99.html Black Chromium] |
*[http://www.finishing.com/104/99.html Black Chromium] |
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*[http://www.bcas.net/Publication/EnergyNewsletter/Document/2003-5.PDF Selective Surface for efficient Solar Thermal Conversion] |
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Revision as of 21:06, 2 July 2004
In solar thermal collectors, a selective surface is chosen based on the ratio of radiation-absorption (alpha) to radiation-emission (epsilon), with a higher ratio meaning better performance. A black chromium nickel-plated copper ("black chrome") panel is very durable, highly resistant to humidity or oxidizing atmospheres and extreme temperatures while being able to retain it's selective properties - but expensive. Ordinary steel or aluminum plate can be spray-painted black for a cheaper (but less effective) collector plate.