考虑到人类对电力和淡水的持续需求,基于这两种产品的热电联产系统引起了研究人员的关注。本研究调查了以燃气轮机(GT)为原动机的电力和淡水热电联产系统。GT废气的浪费能量被热回收蒸汽发生器(HRSG)吸收,并供应蒸汽涡轮(ST)所需的过热蒸汽。为了生产淡水,采用多效脱盐(MED)系统。通过从ST提取蒸汽来提供所需的动力蒸汽。为了减少热电联产系统对环境的污染,提出了GT燃烧室(CC)的蒸汽喷射方法。该系统通过基于遗传算法(GA)的多目标优化工具进行优化。设计变量包括压缩机压力比(CPR),燃气轮机入口温度(TIT),CC中的蒸汽喷射质量流量,HRSG工作压力,HRSG蒸发器夹点温差(PPTD),MED喷射器的蒸汽压力,喷射器动力蒸汽流量,MED效果的数量,返回效果。目标是最小化总成本率(TCR),其中包括系统的初始投资和维护成本,消耗燃料的成本,以及处理CO和NO污染物的成本,以及最大化的效率。最后,据观察,CC中的蒸汽注入导致上述污染物指数的降低,并提出了一种合适的解决方案,以减少拟议的热电联产系统的污染。
Considering the persistent human need for electricity and fresh water, cogeneration systems based on the production of these two products have attracted the attention of researchers. This study investigates a cogeneration system of electricity and fresh water based on gas turbine (GT) as the prime mover. The wasted energy of the GT exhaust gases is absorbed by a heat recovery steam generator (HRSG) and supplies the superheat steam required by the steam turbine (ST). In order to produce fresh water, a multi-effect desalination (MED) system is applied. The motive steam required is provided by extracting steam from the ST. In order to reduce the environmental pollution of this cogeneration system, the steam injection method is proposed in the GT\'s combustion chamber (CC). This system is optimized by a multi-objective optimization tool based on the Genetic Algorithm (GA). The design variables include pressure ratio of compressor (CPR), inlet temperature of gas turbine (TIT), steam injection mass flow rate in the CC, HRSG operating pressure, HRSG evaporator pinch point temperature difference (PPTD), steam pressure of the MED ejector, ejector motive steam flow rate, number of MED effects, and return effect. The goals are to minimize the total cost rate (TCR), which includes the cost of initial investment and maintenance of the system, the cost of consumed fuel, and the cost of disposing of CO and NO pollutants, as well as maximizing the exergy efficiency. In the end, it is observed that the steam injection in the CC leads to the reduction of the mentioned pollutant index, and it is proposed as a suitable solution to reduce the pollution of the proposed cogeneration system.