In this 2004 paper, the general design philosophy for a large 240 MWe pure solar storage plant is discussed. In the stand-alone solar plant, the costs of hybrisation with fossil fuel are found to be high, and lower temperature operation seems more cost-effective. The advantage gained by low temperature operation derives from an unusual combination of large low cost low temperature turbines developed for the nuclear industry, and an inexpensive storage concept which suits that particular temperature range. Should both options be applicable, then this may be the most cost-effective solar thermal electricity development path.
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