Pakistan is facing too grave situation of loadshedding presently. To come out of this situation, pakistan needs to build more and more dams to store water for the production of electricity. But if we plan to build dams, that will take minimum 4-5 years duration. What should we do to meet the needs of electricity during that duration. It is the question that has very simple answer i.e. Solar Energy. Pakistan can use Solar Energy to meet the needs of electricity and it is a step that should be taken timely. Some people are of the view that electrification based on Solar Energy is much more expensive rather than the other resources. Lets have a view of the different experts regarding it.

First of all let me discuss that how photo voltaic solar power panels are used. A layman would normally be interested in knowing as to how electricity could be produced using energy from the sun. Simply put, it can be said that the basic item required to generate this electricity is a solar cell, approximately 2 inches x 1/2 inch in dimension. These cells may be available in other dimensions as well. Some 80 to 100 or even more such cells are pasted on a tampered glass sheet whose dimensions are generally 1.5 feet x 4 feet. The glass sheet with cells pasted on it and inter-connected, is called a solar panel. The light from the sun is used to generate electricity through these cells. It may be clarified that it’s the sun’s light and not its heat that produces electricity. The solar cells are called photovoltaics (PV); the word Photo meaning light and voltaics electricity. The life of a solar panel is approximately 20 to 25 years!

To give you an example of the use of solar energy, you must have noticed solar panels installed on poles along with the telephone booths on your left hand side while commuting on the Motorway. Each of these telephones is being powered by this panel. A battery is installed beneath each solar panel to store energy for keeping the telephone in operation during night when there’s no sun light. It’s a stand-alone system, entirely powered by solar energy. During emergency, the commuters make use of these telephones and call for help.

To give you another example, if you happen to drive from Rawalpindi (Faizabad) towards Murree on the newly constructed Murree Road, you would see on your right hand side blinking red hazard lights installed at the top of each WAPDA pole. Each of these lights is being powered by a stand-alone solar system i.e. a solar panel and a battery. Just imagine, how much expensive and full of hassle it would have been if solar panels weren’t used for this purpose and these lights were provided normal electric connections!

Photo-voltaic solar power panels are often used for local and distributed power generation capability, such as on rooftops of homes and buildings. It is generally on-grid but it can be off-grid for remote places. Unlike the solar panel’s relying on photo-voltaic cells, solar thermal power is centrally generated from thousands of curved mirrors in the desert focusing sun’s light on to water pipes to generate superheated steam which is then used to generate electricity. It is then connected to the grid and transmitted to major population centers. The first such experimental power plant was set up in California’s Mojave desert in the 1980s and many of its pioneers are now helping Brightsource to go big with solar thermal.

In fact, Pakistan is an exceptionally sunny country.We can use the area of Balochistan to generate the electricity. If 0.25% of Balochistan was covered with solar panels with an efficiency of 20%, enough electricity would be generated to cover all of Pakistani demand.

Solar energy makes much sense for Pakistan for several reasons: firstly, 70% of the population lives in 50,000 villages that are very far away from the national grid, according to a report by the Solar Energy Research Center (SERC). Besides, the country’s creaky and outdated electricity infrastructure loses over 30 percent of generated power in transit, more than seven times the losses of a well-run system, according to the Asian Development Bank and the World Bank; and a lack of spare high-voltage grid capacity limits the transmission of power from hydroelectric plants in the north to make up for shortfalls in the south.Connecting these villages to the national grid would be very costly, thus giving each house a solar panel would be cost efficient and would empower people both economically and socially.

In addition to renewable energy from the sun, Pakistan is also fortunate to have something many other countries do not, which are high wind speeds near major centers. Near Islamabad, the wind speed is anywhere from 6.2 to 7.4 meters per second (between 13.8 and 16.5 miles per hour). Near Karachi, the range is between 6.2 and 6.9 (between 13.8 and 15.4 miles per hour).

In only the Balochistan and Sindh provinces, sufficient wind exists to power every coastal village in the country. There also exists a corridor between Gharo and Keti Bandar that alone could produce between 40,000 and 50,000 megawatts of electricity, about twice the current installed capacity in Pakistan, says Ms. Miriam Katz who has studied and written about alternative energy potential in South Asia.

References: Daily “The Nation” , Saturday, 11th July 2009,

http://pakistaniat.com/2009/02/17/utilizing-solar-energy-in-pakistan/

http://www.riazhaq.com/2009/02/solar-energy-for-sunny-pakistan.html

http://www.opfblog.com/6541/100000mw-solar-energy-resource-estimated-in-pakistan/