再熱再生蒸気サイクルの最適給水エンタルピについて

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  • On the Optimum Feedwater Enthalpies of Reheat Regenerative Steam Cycle
  • サイネツ サイセイ ジョウキ サイクル ノ サイテキ キュウスイ エンタルピ ニ ツイテ

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This paper deals with the optimum feedwater enthalpies of reheat steam cycle with a contact heater train. The author has found that, in case two or more heaters are placed above the reheat point, the final feedwater enthalpy can be obtained through simple formulae. The calculations are deve1oped on the basis of J.K. Salisbury's method. Calculated examples show that the change of the heat rate is rather gradual in the vicinity of the optimum feedwater enthalpies. The real optimum enthalpy value of feedwater at the outlet of the socalled "low pressure cycle" is a little lower than the optimum enthalpy va1ue of the simple regenerative cycle, but the difference between the heat rates obtained through these optimum enthalpy values, respectively, is negligible. The optimum distribution of heater enthalpy rise through the cycle is discussed briefly. Double reheat cycle is also described.

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