注蒸汽燃机-海水淡化复合系统热力性能分析

THERMODYNAMIC ANALYSIS OF A COMBINED STEAM-INJECTED GAS TURBINE AND SEAWATER DESALINATION SYSTEM

本文将注蒸汽燃气轮机(STIG)循环和低温多效热蒸汽压缩(METVC)海水淡化系统结合,构成了STIG-METVC复合系统,分析了系统的热力性能,并讨论了产功、产水子系统界面的情况以进一步揭示系统特点。主要结论包括:(1)与单目标系统相比,此联产系统节能效果显著,尤其是在低压比和低注蒸汽比时。(2)降低压比和注蒸汽比,可提高系统产水量、降低功水比。(3)传统意义上的系统(?)效率不能合理反映STIG-METVC系统的性能,因此不能作为性能评价指标。(4)余热锅炉是产功、产水子系统的界面,其(火用)损较大,在各部件中居第二位。提高蒸汽压力有助于减小余热锅炉(火用)损,但此方法对改善STIG-METVC系统性能效果甚微。

A combined power and water system based on steam-injected gas turbine(STIG)cycle and low temperature multi-effect thermal vapor compression(METVC)desalination unit was configured, and the thermodynamic performance was studied.The conditions at the interface of the power-and water-production subsystems were also analyzed,to further reveal the characteristics of the combined system.The main results are:(1)Compared with single-purpose systems,the combined system has significant energy benefits,especially when ...