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    Item type:Publication, Access status: without files ,
    Analytical evaluation of temperature dependent thermal conductivity for solid and hollow cylinders subjected to a uniform heat generation
    (2018-10)
    Kadhim, Dheyaa Eesa
    ;
    Jobair, Hussein K.
    ;
    Abdullah, Oday Ibraheem
    Thermal action of materials is a vast topic, related to their thermal properties in general. Thermal effects can be used positively like all kind of thermometer relay, or annoyancly like distortions in shape and dimension because of heating and cooling. In this study, the variation effect of thermal conductivity on the temperature distribution was evaluated analytically. Solid and hollow cylinders are used as models to accomplish this study. The models assumed to be exposed to a uniform heat generation. Different types of materials (Copper, Aluminum, and Iron) have been used for each model. A comparison is made between the selected materials to show the thermal behavior under steady state condition. The selected range of temperature was very wide which begin from 0C to the melting point of the selected materials. A new code was built to conduct the obtained analytical solution using MATLAB software. The results showed that the behavior of the temperature distribution for both cases (constant and variable thermal conductivity) is the same with a slight difference in the values of the obtained temperatures for both cases. The effect of thermal conductivity to the temperature distribution in the case of Iron material is much higher than the other selected materials due to the low thermal conductivity of Iron.
    Publicationtype: Journal Article
      64
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    Item type:Publication, Access status: without files ,
    Feasibility evaluation of establishing a monocrystalline silicon PV solar power plant for three locations in Iraq, case study
    (2018-08)
    Hahsim, Emad Talib
    ;
    Jobair, Hussein K.
    ;
    Abdullah, Oday Ibraheem
    Energy is a vital topic in human’s life. In Iraq, The percentage of energy consumption by non-renewable energy sources is slightly over 97% [1]. With the increase in the global warming phenomenon accompanied by a high percentage use of fossil fuels as an energy source, it is necessary to reduce the dependence on fossil fuel sources and subrogate them with efficient and environmentally friendly sources. One of these candidate sources is the PV solar panel. The feasibility of constructing a PV solar power plant had been studied in Iraq for three locations by using two different PV solar panel models. Geometrical relations associated with a slope ( and azimuth ( angles for different values are taken into consideration to find the optimum angles of solar radiation incidence. The comparison of utilizing a PV solar power plant instead of a fossil fuel power plant is executed to find the reduction in greenhouse gasses (GHG) emissions. Comparison between the obtained results for the selected locations had been carried out to specify the appropriate location for a PV solar power plant construction. The economic analyses had been accomplished to determine the cost of the constructing PV solar power plant, the levelised cost of energy (LCOE) and cash flow over system entire lifetime.
    Publicationtype: Journal Article
      80