Insulation, kWh/m²/day Table 1. SURFACE METEOROLOGICAL DATA OF BAHIR DAR, ETHIOPIA (NASA) Variable I II III IV V VI VII VIII IX X XI XII Insulation, kWh/m²/day 5.76 6.20 6.48 6.59 6.26 5.74 5.02 5.04 5.67 5.87 6.01 Clearness, 0 - 1 0.68 0.67 0.64 0.63 0.60 0.55 0.48 0.56 0.62 0.69 Temperature, °C 21.10 22.43 23.45 22.46 21.39 19.00 17.92 17.90 18.81 20.29 20.56 Wind speed, m/s 4.14 4.28 4.13 4.07 4.10 5.09 4.98 4.21 3.50 3.06 3.83 4.09 Mulugeta Tadesse et al. Design and Feasibility Analysis of Building Integrated PV (BIPV) System: Case Study in Bahir Dar University Lecture Halls Building. American Journal of Mechanical Engineering, 2017, Vol. 5, No. 1, 24-32. doi:10.12691/ajme-5-1-5 © The Author(s) 2015. Published by Science and Education Publishing.