Energy Consumption Performance Analysis of Electrical Mitad at Mekelle City

  • Mesele Hayelom Hailu
  • Mulu Bayray Kahsay
  • Asfafaw Haileselasie Tesfay
  • Oumer Issa Dawud
Keywords: Electrical mitad, Injera baking energy, Thermal efficiency, Baking temperature, Ethiopia.

Abstract

The Injera baking electrical mitad is the most energy-consuming device in every household in Ethiopia. This research presents a detail engineering study on the energy-consumption performance of existing electrical mitad in Mekelle city. The research work considered thirty-one electrical mitad from different workshops in Mekelle. Depending on the number of clay used, there are three types of electrical mitad; the single clay, the double clay and the rotating type mitad. In this research, it was found out that the average power consumption of existing mitad is in the range of 3.5 KW to 3.9 KW. The specific average baking energy is 0.82, 0.73 and 0.54 kWh/kg of injera for double clay, single clay and rotating type mitad respectively while the thermal efficiency by considering baking of 6kg of Injera on each mitad is 38%, 47% and 61% respectively. In all designs, the baking temperature is in the range of 130-140 0C. Although the rotating type mitad is more energy efficient, it has technical limitations. Due to that, the single and the double clay mitad are widely used by households hence share all the market penetration of injera baking electrical mitad. These commonly used electrical mitad have an energy loss from 50-60% of the input energy.

Downloads

Download data is not yet available.

References

Adrian, Bejan & Allan, D. Kraus. 2003. Heat Transfer Handbook. John Wiley and Sons, ISBN 0-471-39015-1, 1496p.
Alula Gebresas & Asmamaw Tegegne. 2011. Improving energy consumption and durability of the clay bakeware (Mitad). M.Sc. thesis, Department of Material Science and Engineering, College of Natural and Computational Science, Hawassa Univeresity, Hawassa, Ethiopia. (Unpubl.)
Awet, Haftu. 2011. Enhancing the Thermal Conductivity of the Mitad Clay. M.Sc. Thesis, School of Mechanical and Industrial Engineering, Institute of Technology, Bahir Dar University, Bahir Dar, Ethiopia. (Unpubl.)
Dave Sood. 2010, Injera Electric baking: Energy use impacts in Addis Ababa Ethiopia, Report submitted to Ethiopian Electric Power Company and The World Bank Africa Region, Ethiopian Energy Authority, http://www.ethioenergyauthority.gov.et accessed on March 2016.
More inside the PDF
Published
2018-06-05