INTRODUCTION• Solar technologies are broadly characterized as either passive or active.• Conventional energy is finite and fast depleting. On the other hand, the demand for energy is rising exponentially. Extensive use of solar energy is the only way to address this dichotomy. The energy which hits the earth from the sun in one hour is than the whole world uses all year. Yet only a fraction of it is harnessed. If every household or institution sets up its own power generating station to capture the infinite and abundant energy of the sun. We would be successful in meeting their own power requirements but they would actually have excess power that they could sell back to the grid.
CONCENTRATED SOLAR POWER Power Tower Systems Dish/Engine Systems Parabolic Trough Systems
COMPREHENSIVE SOLAR ENERGY POLICIES• Solar tower must be a part of 300 MW solar farms supplying for almost 700,000 homes.• Attention to 50 MW CSPs that use molten salt technology.• Stirling engine based power plants.• Use of Fresnel lenses
COSTS/FINANCIAL ASPECTS AND OTHER POSITIVES• Costs are projected to drop to Rs. 17 to 23 per kilowatt hour in India when capacity exceeds 3,000 MW.• Early CSP plants required water to cool the system but now technology is able to use air to do the cooling.• CSP can be used for desalinating brackish water or seawater which is again a boon for places like Gujarat and Rajasthan.• These plants don’t need any new materials or technology.• flat land and proximity to the load center plants.
PROMOTING SOLAR LIGHTING IN RURAL AREASTO ALLEVIATE POVERTY
OVERVIEW• Information• Lack technical, commercial and financial capacity.• Solar lanterns can be useful devices in these rural areas.
VARIOUS ASPECT OF SOLAR LANTERNS • solar lanterns sell Cost for US$25-90 • Role of MFIs • Environmental Benefits • Social • Employment Economic