Earth News This Week

Friday, August 17, 2007

Daylight saving time in India

Energy savings from advancing the Indian Standard Time by half an hour

Dilip R. Ahuja*, D. P. Sen Gupta* and V. K. Agrawal in the latest issue of Current Science
(http://www.ias.ac.in/currsci/aug102007/298.pdf) has said that could be a 16% saving in electricity consumption if India advanced the Indian Std Time by half an hour, thus being 6 hours ahead of UCT.

Since mechanical clocks were invented, three separate sequential adjustments have been made to timekeeping – the adoption of mean time, of time zones incorporating standard times, finally that of daylight saving time (DST). India has accepted mean times and a standard time, but has resisted adopting time zones or DST for several reasons. We propose advancing of the Indian Standard Time by half an hour to being six hours ahead of the Universal Coordinated Time. The primary benefit estimated from regional seasonal load curves is a saving in peak load electricity of nearly 16%.

This is substantial given the difficulty most regions have in fulfilling the additional evening demand. There would be several other benefits that cannot be quantified easily.

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