Thursday, August 23, 2007

Oh, oh... the power supply is barely above the power demand

After the earthquake last month north of Tokyo, the largest nuclear power plant in the world went offline. It will probably be offline for a year. That power plant supplied a substantial fraction of the electricity in Tokyo.

Over the last few weeks, the temperature around Tokyo has gone as high as 40 degrees C (about 105 degrees F). When the temperature in downtown Tokyo reaches 36 degrees C (97 degrees F), electricity use peaks at about 62 million kilowatts... the total supply, even bringing power from as far away as Hokkaido, is 63 million kilowatts. The supply is only a few percent above the demand, which is really risky... the supply is usually 20% or more above demand.

Wednesday, August 22, was really hot, and The Daily Yomiuri newspaper reports that Tokyo Electric Power Company (TEPCO) narrowly avoided the worst-case scenario. By one method of estimating demand, supply exceeded demand by only 1.6 percent.

http://www.yomiuri.co.jp/dy/business/20070824TDY03002.htm

The risk of a blackout will be relatively high over the next few days because the temperature is forecast to again hit 36C (97F).

Update: Great! This morning, the forecast highs for the next few days has been reduced by several degrees! Maybe we will be OK!

One longterm solution to this problem is to raise the albedo (reflectivity) of the city as much as possible by applying elastomeric roof coatings and paints containing titanium oxide ceramic powders to as many surfaces as possible. This will reduce the heat-island effect. It can be done quickly and cheaply. Planting trees would also help, but that would be much more expensive and would take a long time.

Update, Saturday, August 25: The forecast is for above 95F today.

Take a look at the first episode of Connections by James Burke. The series is excellent. You will see why this pertinent.

http://video.google.com/videoplay?docid=-2010590024183774407&q=connections&total=23594&start=0&num=10&so=0&type=search&plindex=0

And here is an explanation of the Northeast Blackout of 1965.

http://en.wikipedia.org/wiki/Northeast_Blackout_of_1965

No comments: