Low Cost Micro Solar Dome Will Light Up Homes without Electricity

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Dr. Harsh Vardhan, Union Minister for Science & Technology and Earth Sciences, launched the Low Cost and Environment-friendly solar lighting device. The device it is said will prove to be a boon for the urban and rural households in the country that do not have reliable access to electricity.

The device has been developed under the aegis of the Department of Science & Technology.

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Salient features of low cost micro solar dome:

The potential users of this device are 10 million households.

According to preliminary estimates, if this technology is adopted in 10 million households only, it has the potential of saving 1750 million units of energy.

It would also lead to an emission reduction of about 12.5 million ton of CO2 equivalent, hence giving a fillip to the mission of 'Clean India, Green India'.

The manufacturing process, being labour-intensive, would also generate huge job opportunities in the economy.

How the device works:

The Micro Solar Dome captures sunlight through a transparent semi-spherical upper dome and concentrates it inside a dark room.

The light passes through a sun-tube having a thin layer of highly reflective coating on the inner wall of the passage.

It also contains a lower dome having a shutter at the bottom that can be closed if light is not required in the daytime. It is leak proof and works for almost 16 hours daily i.e. throughout the day and 4 hours after sunset.

The Photo-Voltaic Integrated Micro Solar Dome costs about Rs. 1,200 and the Non Photo-Voltaic version around Rs. 500. These cost figures are expected to get further reduced to Rs. 900and Rs. 400 respectively post the scaling-up of the manufacturing process and future linkages with the subsidies under various schemes of the Ministries of Urban Development, Rural Development and Ministry of New and Renewable Energy.

Benefits of the device:

This technology would lead to the saving of fossil fuels to a great extent as 1 unit of energy saved is equivalent to 3 units of energy generated.

The corporate sector can play role under their Corporate Social Responsibilities Schemes for the manufacturing process to scale up.

Incubation centres are being brought up under the 'Start up India, Stand up India' programme which would encourage entrepreneurship in the solar sector to make commercialisation of the device viable.

According to a TERI University test report, the illumination level of the light during mid-day goes as high as a 15W LED bulb.

Extensive Testing of the device for select parameters has been completed at IIT Bombay, TERI University and Indian Institute of Engineering Science and Technology (IIEST), Kolkata.

Field trials have been conducted and 300 Micro Solar Domes are being installed in the slums of Delhi, Mumbai, Kolkata, and Bengaluru.

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