Robin

October 23rd, 2009, 06:26 PM

I was interested in the power output of the palm springs wind farm so I visited your site to find this information. There is a pretty huge typo in the paragraph about the wind farm. The website says:

"A wind turbine's cost can range upwards to $300,000 and can produce 300 kilowatts an hour - the amount of electricity used by a typical household in a month."

This statement is pretty stupid. A watt (or kilowatt) is a measure of rate, energy per time. Saying "300 kilowatts an hours" is meaningless in this context. Miles per hour is also a rate. Does "300 miles per hour an hour" sound correct? No? Well it's just as correct as saying "300 kilowatts an hour". Probably what you meant to say is just "300 kilowatts".

A watt is a joule per second. A joule is a little packet of energy. When you say "300 kilowatts" what you are really saying is "300 thousand joules per second". When you say "300 kilowatts per hour" you are saying "300 thousand joules per second per hour". The only context that this could make sense in is if you were talking about energy production acceleration, which you are clearly not in said paragraph.

If you were talking about a Corvette you might say that is was capable of speeds around "180 miles per hour", not "180 miles per hour an hour" which is just stupid.

This is an understandable mistake for the non-technical. But leaving it up on your website is making everyone who reads it a little more clueless.

Thanks for your attention to this matter.

"A wind turbine's cost can range upwards to $300,000 and can produce 300 kilowatts an hour - the amount of electricity used by a typical household in a month."

This statement is pretty stupid. A watt (or kilowatt) is a measure of rate, energy per time. Saying "300 kilowatts an hours" is meaningless in this context. Miles per hour is also a rate. Does "300 miles per hour an hour" sound correct? No? Well it's just as correct as saying "300 kilowatts an hour". Probably what you meant to say is just "300 kilowatts".

A watt is a joule per second. A joule is a little packet of energy. When you say "300 kilowatts" what you are really saying is "300 thousand joules per second". When you say "300 kilowatts per hour" you are saying "300 thousand joules per second per hour". The only context that this could make sense in is if you were talking about energy production acceleration, which you are clearly not in said paragraph.

If you were talking about a Corvette you might say that is was capable of speeds around "180 miles per hour", not "180 miles per hour an hour" which is just stupid.

This is an understandable mistake for the non-technical. But leaving it up on your website is making everyone who reads it a little more clueless.

Thanks for your attention to this matter.