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Abstract

1.  CARBON CUPROUS OXIDE COMPOSITE NANOPARTICLES ON GLASS TUBES FOR SOLAR HEAT COLLECTION

Mahmoud A. Rabah, Rabab M. El Sherif, Hayat H. El Agamy, Mohamed Shaaban, Abo Rehab H. Mahmoud
Carbon cuprous oxide composite nanoparticles were chemically deposited on surface of thin glass tubes of spent energy saving lamps for solar heat collection. Carbon was obtained from fly ash of heavy oil incomplete combustion in electric power stations. Impurities in the carbon were removed by leaching with mineral acids. The mineral free carbon was then wet ground to have a submicron size. After filtration, it was reacted with concentrated sulfuric/fuming nitric acid mixture on cold for 3 to 4 days. Potassium chlorate was then added drop wise on hot conditions to a carbon slurry followed by filtration. Nanocarbon sample was mixed with 5% by weight PVA to help adhesion to the glass surface. Carbon so deposited was doped with copper nitrate solution. After dryness, the carbon/copper nitrate film was dipped in hydrazine hydrate to form cuprous oxide carbon composite, It was then roasted at 380 to 400 °C A heat collector testing assembly was constructed of 5 glass coils connected in series with a total surface area of 1250 cm2. Heat collection was estimated by water flowing in the glass coils that are coated with the carbon/copper film. Parameters affecting the solar collection efficiency such as time of exposure and mass flow rate of the water were studied. Results revealed that the prepared glass coil has proven successful energy collector for solar heat.

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