Abstract
Pakistan has a severe electricity load shading problem. Government is trying to find out all ways for electricity generation. Alternative energy board is working to find out the energy potential using all alternative resources. Board has an objective to produce 9700 MW by 2030 to overcome load shading problem. A research was designed to find out the solar energy potential as an alternative source of energy from rooftops of residential areas in district Lahore. Punjab Governments servants housing society Lahore is selected. The society has minimum slope, aspect and shadows effects on the roofs. Also houses in PGSHS have same house structures and good town plan. A few portions of roofs are digitized to measure the available rooftop area for Photovoltaic panel’s installation. GIS models are used to find out solar energy potential monthly as well as yearly for the year of 2014. The potential estimated is 39,613,072 kWh/year. The monthly total energy consumption of the society is 347,140 kWh which is only 11% of energy production from PV solar panels. As the estimated energy is 9 times than the energy demand of the society, extra energy can be used in local/national electricity transmission grid. Solar PV energy would be supplement to compensate energy shortfall in local area.
Highlights
On the earth, the biggest source of energy is the sun
Solar energy is a essential part of life
This study proposes Geographic information system techniques and modeling to identify optimal place to estimate solar energy potential from the rooftop of the site in district Lahore
Summary
The biggest source of energy is the sun. Solar flux is more than many times of human need. Solar energy is a essential part of life. Annual average solar energy on entire planet may produce 1.3 - 1.4 kW/m2 electric energy [1] [2]. Intensity of solar flux depends upon geographic location, weather condition, altitude and diurnal variation. The minimum solar potential available worldwide is 0.06 kW/m2 (~500 kWh/m2 per year) to the highest flux of 0.25 kW/m2 (~2200 kWh/m2/year) in deserts areas of Africa and Australia [3]
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