الفهرس 
Introduction and literature reviewOnly 14 pages are availabe for public view
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Abstract
Nowadays, solar energy is considered as one of the most important sources of free, clean, and renewable energy with zero carbon dioxide emission. Solar energy collectors considered as a type of heat exchangers which transform solar energy to an internal energy of the transport medium. This thesis interested in the application of the nanofluids in prototype flat plate solar collectors. For this purpose, iron vanadate oxide nanoparticle was prepared in one step by simple sol-gel method at different pH-3, 9 and 11. The prepared samples were investigated at 100 O C or 500 OC. The samples were characterized by different tools. The results showed the formation of mixed phases; iron –vanadium oxide and hematite. The based ethylene glycol (EG) nanofluids were prepared using prolonged sonication. The prepared fluid was characterized by Rheological measurements and dynamic light scattering (DLS). Different factors affecting the stabilization of the nanofluid as the weight of nanomaterial, sonication time, sonication temperature and pH were also studied. To evaluate the thermal conductivity of the prepared nanofluide, two prototypes flat plat collectors were constructed to be used in the natural solar energy to calculate the thermal conductivity. The synthetized iron-vanadium oxide nanoparticles at pH- 9 showed high thermal conductivity behavior in the constructed flat plate collectors in different weathering conditions. The results showed that nanofluid increase the efficiency of flat plat collector. The thesis also presents a modeling study for the generation of superheated steam by MATLAB software