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The top cover of a flat plate solar collector is generally exposed to wind. In indoor experiments it is necessary to simulate this wind. Correlations have been developed for the wind heat transfer coefficient over flat horizontal surfaces exposed to forced air flow, produced by industrial fans in indoor experiments.
Ternary catalysts containing oxides of copper, zinc, and aluminum have been widely used as catalysts for water-gas shift reactions and methanol synthesis. Although many studies have been carried out with the calcined mixed oxides, very little information is available regarding the effect of Al 3+ on the structure of the copper-zinc hydroxycarbonate which is the precursor of the catalyst...
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