B-7 超臨界二酸化炭素を作動媒体とするソーラーガスタービンサイクル(システム,一般講演)

概要

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Solar thermal power generation system equipped with molten salt thermal storage is capable of operating continuously at a rated power being independent of the variation of solar irradiation in a day. A gas turbine cycle for solar applications is studied with working fluid in a medium temperature range (600〜850K) where molten salt exists stably as a liquid phase. It is found that a closed cycle with carbon dioxide as a working fluid may be a promising candidate for solar application. The cycle featured in smaller compressor work shows high cycle efficiency if system pressure and temperature are chosen properly. The temperature efficiency of a recuperator is shown to govern the efficiency. Under the condition of 98% temperature efficiency, the regenerative cycle with inter-cooling gives cycle efficiency of as much as 45% at a turbine inlet temperature of 800K.
公益社団法人日本ガスタービン学会の論文
2005-09-01