超临界蒸汽参数发电技术发展评述

基于水蒸气动力循环的热力学原理，采用技术与经济性并重的方法对超临界参数发电技术的现状与预期前景进行了讨论。随蒸汽初参数的提高，再热次数增加，机组效率均将提高，但同时机组造价也同步增加。提高蒸汽温度对机组效率的贡献大于提高蒸汽压力对效率的贡献。应从技术与经济性权衡整体效益，实现机组的系统优化设计，降低建造成本。探讨了当蒸汽温度达到700℃后采用无再热的简单热力循环系统的设想。

Review on Supercritical Steam Power Generating Technology

Based on the thermodynamic principle of steam power cycle,the current status and the predict develop-ments of super - critical power generating technology are discussed. Both theoretical and economical analyzing methods are adopted. With the steam temperature rising,the double reheat （s）will be used,which results the improved cycle efficiency and also the increased capital cost. The contribution to unit efficiency by steam tempera-ture rising is greater than that by steam pressure increasing. When the 700 ℃ temperature will be reached,the proposed simple thermal cycle without reheat are discussed.