In Ethiopia the traditional way of injera baking practice is commonly carried out by gathering biomass fuels: such as fire wood, crop residue, dried animal dung. Traditional biomass energy sources result negative effects such as deforestation, environmental pollution and health problem. Also in such activities women and children are more vulnerable groups exposed to indoor smoke health problems. The overall aim of this thesis work is to use a solar powered injera baking oven, so as to avoid the health problems accompanied by burning fossil fuels and assure the environmental development sustainability. In this thesis a solar powered Injera baking oven system is designed and manufactured, using the thermal heat transfer engine oil as working fluid. The system consists of the parabolic solar collector trough assembly, high temperature thermal fluid reservoir, the baking pan assembly, the cold temperature working fluid reservoir, the pump and the connecting pipes. The heat transfer fluid selected in this work is the engine oil based Copper oxide, CuO, Nanoparticle fluid to compare with engine oil without Nanoparticle, when used as working heat transfer fluid in solar powered injera baking oven. To ascertain our hypothesis an investigation of thermal conductivity and heat conservation capacity with and without Nanoparticle working thermal heat transfer fluid was explored. Copper oxide (CuO) Nanofluid of five different amounts of Nanoparticle in range of 0.2, 0.4, 0.6, 0.8 and 1.0 grams of Nanoparticle and 10 millimeter base fluid was prepared to measure the temperature dependent thermal conductivity. All the Copper oxide Nanofluid concentration considered in this work retrieved 35% improvement of thermal conductivity. During validation of the experimental test, it has been found the engine oil based Nanoparticle fluid has gained more augmentation of heat transfer than that of engine oil without Nanoparticle. Also from heat transfer point of view for sustainable flow of heat, initially the overall baking pan assembly should be developed thermo-hydraulically, with ≥ 94℃ (the boiling point of water at Bahirdar) uniformly throughout the system. The temperature of the working heat transfer oil in the storage and the absorber has been found in between 211 - 222℃, thus to retain this value the reservoir of the hot oil should be ensured to be insulated adiabatically. As a large and suffice size of parabolic trough is required to attain a continuous circulation of heated oil with required temperature for sustainable baking use, we became to know such a system is valid only for high scale size users such as institutions student mess, military camps and the like but not in small scale size because in the beginning, the heated up baking oven surface temperature drops down up to 60 ℃ when the 211 - 222 ℃ heated oil flows to the gallery so it needs a continuous supply of heat to raise the temperature between 94 ℃ to 165 ℃ range.