Survey Of Energy Resources
SOLAR ENERGY


India

The Indian Renewable Energy programme is well established, having been constituted under the Department of Science and Technology before being transferred to the newly-created Department of Non-Conventional Energy Sources in 1982. The Department was upgraded to the Ministry of Non-Conventional Energy Sources (MNES) in 1992 and MNES has since worked with the Indian Renewable Energy Development Agency (IREDA - created in 1987), to accelerate the momentum of renewable energy development. The promotion has been achieved through R&D, demonstration projects, government subsidy programmes, programmes based on cost recovery supported by IREDA and also private sector projects.

India receives a good level of solar radiation, the daily incidence ranging from 4 to 7 kWh/m2 depending on location. Solar thermal and solar photovoltaic technologies are both encompassed by the Solar Energy Programme that is being implemented by the MNES. The Programme, regarded as one of the largest in the world, plans to utilise India’s estimated solar power potential of 20 MW/km2 and 35 MW/km2 solar thermal. The country has also developed a substantial manufacturing capability, becoming a lead producer in the developing world.

The principal objective of the Solar Thermal Programme is the market development and commercialisation of solar water heaters, solar cookers etc. At the present time the installed systems account for some 500 000 m2 collector area and some 485 000 solar cookers.

Solar water heating has been applied in a wide variety of circumstances from individual residences to hotels to industrial processes. The near-future potential for such systems is around 30 million m2 of collector area. Solar air heating has been utilised in various parts of the country for drying agricultural produce and in timber kilns. Solar stills have been employed in large numbers to supply distilled water in rural hospitals, battery-charging stations and for the supply of drinking water in remote arid zones.

The MNES has been promoting the sales of box solar cookers since the early 1980’s. This type of cooker is designed to prepare food for up to 4-5 people and can be supplied with or without electrical back-up. However, the Dish Solar Cooker designed for 10-15 people and the Community Solar Cooker for 35-40 people have also been developed. In March 1999 the world’s largest Solar Steam Cooking System was installed at Mount Abu, Rajasthan. It is a hybrid system with back-up oil-fired boilers and is designed to prepare food for 10 000 people.

There is also a separate Solar Buildings Programme aimed at creating an awareness of the potential for solar-efficient buildings. The passive solar design concept is a climate-responsive architectural practice that is now being researched, developed and implemented throughout the country.

During 1999, a proposal for a 140 MW integrated solar combined-cycle power project with a solar thermal power capacity of 35 MW was agreed. The plant, based on the parabolic trough collector technology, is to be located in the Jodhpur district of Rajasthan and will have supplementary firing by naphtha/gas on sunless days. It is due for completion by end-2002.

A Solar PV Programme has been developed by the MNES for the past two decades, aimed particularly at rural and remote areas. To date approximately 44 MW have been installed (representing some 750 000 systems), of which street lighting and solar lanterns account for 2.8 MW each, home lighting systems for 4.3 MW, water pumps for 4.2 MW, telecommunications for 14.7 MW, power plants for 2.2 MW and other applications for 12.5 MW. Exports account for another 13.5 MW.

The MNES has instituted a plan for establishing solar PV power generation of 1 MW for use in specialised applications: voltage support at rural sub-stations and peak shaving in urban centres. At the present time 15 grid-interactive solar PV power projects have been installed in seven states and a further 10 are under construction.

Country Notes (SOLAR ENERGY)

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