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Research on surface coating of a solar collector using thermal spray foaming methodology for low cost  

Kim, Bu-Ahn (Dept. of materials Science and Engineering, Pukyong Natl. University)
Choi, Kwang-Hwan (Dept. of Refrigeration and air-conditioning Engineering, Pukyong Natl. University)
Roh, Sang-Hoon (Dept. of materials Science and Engineering, Graduate School, Pukyong Natl. University)
Publication Information
Journal of the Korean Solar Energy Society / v.26, no.3, 2006 , pp. 9-16 More about this Journal
Abstract
A solar collector surface coated with a low emission material is still imported from other developed countries expensively. Thus it is very significant to develop a new coating method with a cheap alternative coating material instead of the imported high-cost collector surface. A thermal spray method was adopted to coat a cheap Titania on a copper plate. Generally, a new coating on the copper plate was conducted successfully by selecting a proper ratio of carbon and acetylene. By measuring an absorption rate of solar and heat emission rate, all the plate types gained a high absorption rate of 98% approximately, more or less, but all of the types still have a high emission. Finally it was clear that more research is needed to advance the coated-plate to subdue the high emission from the hot plate surface and the higher the Titania's proportion is, the lower the emission is on the surface.
Keywords
Thermal spray; Titania; Selective coating surface; Emission rate;
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