三种中低温余热蒸汽发电系统的比较研究

Comparative Study of Three Power Generation Systems with Medium low Temperature Waste Heat Steam

摘要:

建立了150～350 ℃中低温余热蒸汽低沸点有机工质联合循环（S ORC）发电系统数学模型.比较了相同热源条件下，水蒸气朗肯循环（SRC）、有机朗肯循环（ORC）及S ORC三种发电系统的热效率、效率、运行压力、发电量.结果表明：150～210℃热源条件下，ORC有着最高的热效率、效率和发电量；210～350℃热源条件下，S ORC的各项性能有优势,其热效率和效率均高于SRC和ORC发电系统.

Abstract:

A mathematical model for steam organic Rankine cycle (S ORC) power generation system at 150～350 ℃ was established. S ORC power generation system consists of steam Rankine cycle（SRC）and organic Rankine cycle（ORC）power generation systems. Thermal efficiency, exergy efficiency, operation pressure and capacity of the systems were compared under the same heat source conditions. The results show that under the condition of 150~210 ℃ heat source, ORC has the highest thermal efficiency, exergy efficiency and power generation. While under the condition of 210~350 ℃ heat source, the performance of S ORC has an advantage over SRC and ORC. Its thermal efficiency and exergy efficiency are higher than those of SRC and ORC power systems.