三連鎖混合冷媒サイクルを用いた高度な液化水素の比較研究
M Shawky Ismail1, M Abd ElSalam ElSeuofy2, Abd ElHamid Attia1
1Mechanical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt.
Scientific reports
|September 1, 2025
まとめ
この研究では,水素液化のためのエネルギー消費を減らすために2つのトリプルカスケード混合冷媒サイクルを導入します. ケース2は,ケース1よりも優れたエネルギー効率と環境への影響が低いことを示しています.
科学分野:
- エネルギー工学
- 熱力学について
- 持続可能なエネルギー
背景:
- 水素は,持続可能なエネルギーシステムと効率的な貯蔵に不可欠なクリーンエネルギー供給源です.
- 液化水素はエネルギー密度を高めますが,高いエネルギー消費の課題に直面しています.
- 効率的な水素貯蔵は,大規模なエネルギーシステムとエネルギー移行に不可欠です.
研究 の 目的:
- 水素の液化におけるエネルギー消費を削減するための2つの新しいトリプルカスケード混合冷媒サイクル設計を提案し,評価する.
- 高密度の水素を冷凍温度 (-245°Cと-249°C) で貯蔵する.
- 水素の液化プロセスの熱力学と経済的性能を向上させる.
主な方法:
- 2つの異なるトリプルカスケード混合冷媒サイクル構成の開発 (ケース1とケース2).
- システムシミュレーションのために Aspen HYSYS を利用し,最適化のために Aspen Optimizer を使用します.
- 熱力学的効率を評価し,改善すべき分野を特定するためにエクセルジー分析を行う.
主要な成果:
- ケース1は,6.98 kWh/kgH2の特定のエネルギー消費 (SEC) を達成し,ベースラインより17.4%減少した.
- ケース2は6.19kWh/kgH2の低いSECを達成し,エネルギー破壊が37%減少しました.
- ケース2では,資本支出が5.8%削減され,炭素フットプリントが22%削減されました.
結論:
- 提案されているトリプルカスケード混合冷媒サイクルは,水素の液化のためのエネルギー消費を大幅に削減します.
- ケース2は,ケース1よりも優れた熱力学的効率,経済的利益,環境上の利点を提供します.
- これらの発見は,効率的で持続可能な水素エネルギー貯蔵ソリューションの進歩を支援します.
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