50,000 homes to be electrified with Rs 50 million 'Solar Homes' plan
FAISALABAD (October 13 2007): The Alternative Energy Development Board (AEDB) has prepared a 'Solar Homes' programme, which will be implemented at a total cost of Rs 50.35 million, while research on development of one kw fuel cell vehicle in the country will be implemented at a cost of Rs 4.03 million.
Under this plan, more than 54,000 homes will be electrified through wind and solar sources by 2010. According to official sources, Pakistan has not so far used its solar potential to save on conventional energy, although its central and southern parts can be used for solar thermal power plants in addition to water/home heating in the north where gas is currently used for heating purposes.
The solar potential can be gauged from Jacobabad in southern parts, which is an excellent location for solar energy, as it receives 2,142 kWh solar irradiation/square metre/year, which works out at 230 KWh /m2/year.
Despite the high generation cost of solar power at present, the mid-term prospects are promising due to the expected technological improvements and economics of mass production of PVs. Recent developments point to nearly 41 percent efficiency of sunlight conversion, which could reduce the cost of generation to the order of 8 - 10 cents per unit, (as in oil-based plants).
Furthermore, the AEDB has also prepared a plan to establish a demonstration unit for solar thermal power plants technologies at an estimated cost of Rs 39.8 million. Solar Water Pumping and Desalination Unit will be established at an estimated cost of Rs 33.040 million.
For several years, official sources said, climate change has been attributed to human activity and the resulting emission of greenhouse gases (IPCC, 2007). Consequently, there has been growing focus on alternative forms of energy.
The contribution of alternative energy in the overall energy mix in Pakistan is negligible at present. However, the first wind farms are in the implementation stage. These projects will be eligible for carbon credits to reduce the tariff.
The Alternative Energy Development Board (AEDB) has been established to facilitate development of renewable energy projects. At least 5 percent of the total electricity generating capacity of the country (ie 9,700 MW) is targeted to be based on these sources by the year 2030. AEDB would also develop and implement off-grid electrification programme for rural areas. In addition, under the remote village electrification programme, the first 400 villages (54,000 homes) will be electrified through wind and solar sources by2010.
Since 2001, global wind capacity has nearly doubled to 47,760 megawatts and is cheaper than natural gas even without subsidies. On good sites, wind is even closing in on coal. The world's global sales of wind power equipment are projected to reach $49 billion a year by 2012. The global wind industry now employs well over 100,000 people, and Germany alone expects to have more than 100,000 wind energy related jobs by 2010.
Pakistan has some excellent sites to exploit wind energy. A section of the coastal area of Sindh has been identified as having wind power potential of 50,000 MW. The annual average wind speed, at 50 metre height, at Gharo, Mirpursakro and Talhar sites in Sindh is 6.5 metre/second and the capacity factors for wind turbines at these sites are estimated to be in the range of 23 to 28 percent.
With improved site studies, wider wind mapping, better project planning, R&D and learning cost of wind energy projects can be reduced to acceptable levels of around 6 cents/kWh, and even below.
Wind energy has the disadvantage of being intermittent, but it is ideal for 'pump storage' whereby it can be used for pumping water back into a reservoir of, say a hydropower plant, during periods of lean use.
Official sources said that many new technologies and sources of energy are currently being investigated. As part of Vision 2030, the development of such systems will need to be completed as a matter of priority in order to meet the looming oil crunch. In all cases, the true costs will need to be worked out for all competing forms of present and future energy--coal and its derivatives (health costs), hydroelectric plants in the Northern Areas (contribution to and danger from seismic activity), nuclear (waste handling, de-commissioning, and availability of fissionable material), solar cells (monopolies, and toxic wastes from production), fuel cells (secondary source costs), wind energy (low availability and storage issues which it shares with solar), fusion (time factor), ethanol (more sugarcane/biomass).
Business Recorder [Pakistan's First Financial Daily]