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Originally Posted by Besoeker
That's your assumption. Perhaps not an unreasonable one.
No assumptions used or required.
Solar collectors cannot operate at 70% capacity on average.
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I don't know where that's come from. It seems you might be loosing your concentration. I was talking about plants. As was NREL. As said before NREL's statement is very clear and if you cant accept that, then ask them directly, rather than continue to speculate and throw up questions about statements, that have not been represented. That type of remark you made just looks silly, when you know very well that NREL has been talking about plants. Get one word into your mind. PLANTS. NREL speak about power PLANTS in the context of potential 70% capacity factors. Stay on point, as talking about separate components in that context, detracts from the point NREL has made, which is about Power PLANTS, when comparing solar to coal power plants.
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As the cost of thermal storage is reduced, future parabolic trough plants could yield capacity factors greater than 70%, competing directly with future baseload combined cycle plants or coal plants.
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http://www.nrel.gov/csp/troughnet/market_economic_assess.html 