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Business EconomyPosted at: Jan 23 2018 3:35PM


Bijli Bacho: Switch to DC with no power shortage

New Delhi, Jan 23 (UNI) If you are tired of paying high power bills, a new formula of Solar DC Inverterless system has been carved out by IIT Madras students.
Center for Decentralized Power Systems (CDPS) at IIT Madras took the bold step of conversion of in-home power distribution from 230V AC to 48V DC, so as to directly power DC appliances and directly tap roof-top solar power. It resulted into most energy-efficient solution for homes and offices.
With the maturing of electronic technology, electrically powered home and office appliances are becoming far more energy efficient, by using only direct current (DC). To power them using existing AC power lines, each such device needs an AC-to-DC converter which adds to the losses, cost and unreliability, said Prof. Ashok Jhunjhunwala, Faculty In-Charge, IIT Madras Research Park and Professor, IIT Madras.
India is fortunate to be blessed with good solar availability, making the sun a promising renewable energy resource. Roof-top solar photovoltaics, when directly used to power a DC line, offers the lowest-cost decentralized source of electricity to supplement power from the grid. With the addition of modestly sized batteries, the system promises energy delivery even during load shedding and long power-outages.
Solar-DC is also a viable and cost-effective solution for powering homes in remote off-grid areas, due to its reliability, affordability and its operation without dependency on grid.
The Solar-DC Inverterless system, consisting of DC solar generation, the DC power-line, DC appliances and battery, is a landmark innovation with the potential to be rapidly deployed in every home and office in India as well as in homes across the world. It will transform the lives of ordinary citizens by providing them reliable power supply, energy-efficient appliances and lower cost of electricity all at the same time.
DC appliances consume 15-60% less power when compared to their AC counterparts. It enables every home get limited amount of power 24×7 during load shedding.
Currently, the system has already been deployed in 4000 off-grid homes in the districts of Jodhpur and Jaisalmer in Rajasthan, and is being deployed in 7200 homes in several districts of Assam.
It has also been deployed in Belagavadi in Karnataka, Alandur (Trichy) in Tamil Nadu and some villages in Orissa, Andhra Pradesh and Telengana, besides being deployed in several buildings on the IIT campus.
The conversion to DC mode would eliminate huge losses; the investment is low with greater returns. At the same time it is reliable with no danger to environment. It is for the betterment of future in terms of technology.
Meanwhile, India has set a target of total renewable energy of 175 GW by 2022, and its commitment is to reduce global warming.
UNI DJK SHK 1534
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