There’s an article from Lake Havasu AZ (08/21/08) about a church which installed a solar roof. It cost $100K and they expect to save $20K per year. It helps that they can get various rebates. One point is that the church is only heavily used one day a week and can sell a lot of the electricity that they generate to the grid.
The article also mentions that the average residential installation in AZ is 4 to 7 kW and costs about $8/W. The church cost was slightly less ($7.14/W for 14kW), suggesting that the cost benefit scales only slightly.
Monday, August 25, 2008
Wednesday, August 6, 2008
Tidal Power
According to Technology Review (online - 29 June 08) a 1.8 MW Irish tidal power project will cost $7-8 per W and provide the 1.2 kW needed per home.
Tuesday, August 5, 2008
Ethanol abd Food Prices
There was a story on NPR this morning about rising food prices due to increased demand for corn to make ethanol. On one side there was a claim that 35 percent of the rise was due to ethanol, while the other claimed five percent. I’m fairly sure that this is a manifestation of the Chernobyl Syndrome - the estimate depends on the position of the advocate.
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