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A feast for book worms How to roast 45 human beings alive Cricket comes calling to Chennai Paranjoy on crony capitalism Vanakkam Chennaiyin FC Chennai airport to become solar-powered Apollo targets a third of CV tyre market Chevrolet Sail U-VA Launched A budget that butted into deficit A praiseworthy peer recognition The sweet tooth of the city Green energy, not really green? Need for an integrated approach to medicine Murugappas-focus on consolidation When the crowd will miss the roar The underground don zips through North Chennai booms Prithika Yashini takes charge... Must visit of 2014 Overflowing garbage Frontier Mediville attracts Japanese investments Chennai soon to get an Aerospace Park Safe Trac-keeps track on your safety Chennai teachers rank low The curious case of Evgenii Berdnikov Aviation sector to grow three times... Reality Check A new technique to treat dry sewage The worst is yet to come Presto! Bravo! Metro mania India’s first 3D Museum He made Ranganathan Street so crowded... Indian media-operators of democracy Pocket Therapist finds mention in Forbes Hawker’s paradise gets a permanent place Tamil Nadu Premier League launched Arnold visits Chennai It is not only your noodle... Mexico opens Consulate in Chennai Talk your way and land in a job From trash land to tourist spot Technology handshakes with sanitation Working space for women by woman Realty bytes Medical miracle! A skinny affair Yes, you are safe! Water woes Chennaites lose 7 crore to debit card frauds Colourful welcome at the Saidapet station Thrills for the holiday season It’s so cool! International conference on saving energy, environment Chennai to Bengaluru as quick as pizza delivery Chennai gets its Imax Raj Bhavan opened the gates for public City Corner - Chennai Car-free Bessy Metro chugs through the city When Marina became the Tahrir Square Kollywood’s Mahabharatha Engineering colleges lose lustre The 20-year itch of Hindujas ends The auto gets a remake 377 yet young Chennai Silks in flames Missing, but not missing the top spot Bewailing monsoons the new fad Hey Chitti! please take my order Black outs will be knocked out The sweet killer India’s first online-only bicycle brand 60 years of cultural and economic ties Chennai Metro looking for revival Ennore Port excels Meters return to the metro Education a cause of concern City Corner Yamaha in the news Online approval of layout plans Chennai, the noisiest city Star studded city Is Chennai now the accident capital? TTV stumps all CMRL takes off till airport Tambaram tracks…. Keep in touch, anytime anywhere SGRI – a global research centre for building materials Water wars begin Book your water tanker Maruti Suzuki wins NIQR award Indian of the Year Nilam threatens the city An industry institution link… Metro chugs the green way Sathyabhamasat propels ahead Google street view’s India competitor Read before you buy... Two friends trigger a change K7’s Entrepreneurial Odyssey Perplexing communications State VAT leads to inflation: a study Self-sufficiency in dredging... When Chennai became Venice Coimbatore backs up for Chennai I know nothing else but cinema... Million landmark and Rs. 200 crore influx by Yamaha Know the start-ups in the city A sweet marketing splash by Pattappas City Corner-June Boozing and driving Force Motors’ two new SUVs Outlays and outcome – the long gap The sunshine and the shadow side of this digital era Doing business is not so easy in Chennai Technologists to rescue Building highs and lows This dabba has a cure for all your ailments City Corner Planning the right energy
 
Black outs will be knocked out

With summer fast approaching, power black outs loom in the horizon. The electrical man, Ashok Jhunjhunwala, the head of the department of Electricals at IIT-Madras enthralled the audience with a rather simple solution. “All our appliances use only DC power. Since our input is AC power, we lose about 20 per cent to 50 per cent in conversion of DC to AC power. In the future, refrigerators, air conditioners and washing machines will all run on DC power,” said Jhunjhunwala at the Extra Mural Lecture series.

    The research team at IIT led by Jhunjhunwala has designed a simple switching mechanism, which when senses a voltage  drop in grid supply, will automatically switch the input power to DC mode. With this 10 per cent DC power, 2 fans, light and a mobile charger can be powered comfortably. An additional 50 watt solar power generator at the roof top will comfortably power the house.

    The Extra Mural Lecture series which is now on its 30th year, is a yearlong event that brings people from different walks of life to address the students. This is now being extended to other colleges in and around

the city. The average power consumption by DC fans and lights is less than half the power consumed by AC devices. Jhunjhunwala suggested a 38 volt DC line at homes is absolutely safe and shock free.

He stated that solar power panels of 50 watt that cost around Rs 25,000, if erected on each roof top, can meet the demand of the house and the DC power generated by the solar panel, if directly used without being converted to AC current, can save a lot of energy. An estimate made by the researchers point out that all households use roof top solar power, it will off set a load of 190,000 GWH per year which is almost equal to the annual total domestic consumption.

Jhunjhunwala anticipates India would become free from power cuts in 5 years and in next 15 years 50 per cent of power could be from solar.

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