Article ID Journal Published Year Pages File Type
1551451 Solar Energy 2011 10 Pages PDF
Abstract
For the same conditions, an approximate theoretical model is developed for the evaluation of the U-value. The theoretical model is validated against the experimental results for a collector tube having air inside the glass cover at atmospheric pressure and found to be in close agreement. Then, the influence of gas pressure is studied for various gases. Possible presence of air, hydrogen, helium and argon is discussed.
Keywords
Related Topics
Physical Sciences and Engineering Energy Renewable Energy, Sustainability and the Environment
Preview
Experimental and theoretical evaluation of the overall heat loss coefficient of vacuum tubes of a solar collector
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