Bottled Wind Could Be as Constant as Coal Power

Re:Bottled Wind Could Be as Constant as Coal Power by happenstance on Thursday March 11, 2010 @03:04PM (#1184739)

When you compress air, it heats up and expands -- thus making the pressure go up faster than one might expect. So, when storing it you lose a lot of energy as heat.

When you let it uncompress, it cools -- losing a lot of energy again.

Point is, you lose quite a bit of energy going both ways.

A good solution might be to combine wind and pumped hydro: have the wind turbine pump water to a higher elevation when extra wind is available.

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Re:Bottled Wind Could Be as Constant as Coal Power by jessriedel on Thursday March 11, 2010 @05:50PM (#1185193)

That is definitely an interesting point, although I assume it was taken into account when companies and the government did their comparison with hydroelectric storage. Larger caverns should reduce the amount of energy lost due to heat.

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