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首页> 外文期刊>Energy Conversion & Management >Pinch and exergy evaluation of Kalina/Rankine/gas/steam combined power cycles for tri-generation of power, cooling and hot water using liquefied natural gas regasification
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Pinch and exergy evaluation of Kalina/Rankine/gas/steam combined power cycles for tri-generation of power, cooling and hot water using liquefied natural gas regasification

机译：用液化天然气重新缩放，捏住Kalina / Quankine / Gas蒸汽组合电源循环的Kalina / Rankine / Gas /蒸汽组合电源循环

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摘要

Today, due to the increasing trend of energy demand in the world, the use of energy types with the approach of maximizing the efficiency of energy systems is inevitable. In this paper, an integrated power generation system consisting of low-temperature organic Rankine cycle, gas and steam combined power plant and Kalina power generation unit is developed and analyzed. Liquefied natural gas regasification is employed to supply the cooling for the hybrid system. This integrated system generates 158.5 MW power, 9.498 MW cooling, and 46.02 kg/s hot water. The total electrical, thermal, and exergy efficiencies of the integrated system are 48.62%, 55.18% and 67.74%, respectively. System exergy analysis shows that reactors and heat exchangers accounted for the largest share of total exergy destruction, each accounting for 59.91% and 15.76% of total energy destruction, respectively, indicating that these two parts have more than 75% of the destruction occurred. The pinch method was used to extract the heat exchanger network related to the multi-stream heat exchanger of the integrated system. In the parametric analysis, the effect of air/fuel molar ratio (input to the combustion chamber) on system performance has been investigated. One of the most important results is the increase in the total thermal efficiency of the system to 56.15% if the inlet air into the combustion chamber is reduced to 250.0 kg/s. The parametric analysis results also show that in addition to increasing the efficiency of the system due to the decrease in the amount of incoming air, the ratio of power production as the main product to byproducts (hot water and cooling) increases.
机译：今天，由于世界上能源需求的趋势越来越大，利用能源类型最大化能源系统效率的能源类型是不可避免的。本文开发并分析了由低温有机朗肯循环，气体和蒸汽组合电厂和Kalina发电单元组成的集成发电系统。采用液化天然气重新置化供给混合动力系统的冷却。该集成系统产生158.5 MW电源，9.498 MW冷却和46.02千克/秒的热水。集成系统的总电气，热和漏洞效率分别为48.62％，55.18％和67.74％。系统Deergy分析表明，电抗器和热交换器分别占全面毁灭的最大份额，每个占总能毁灭的59.91％和15.76％，表明这两部分有超过75％的破坏发生。捏合方法用于提取与集成系统的多流热交换器相关的热交换器网络。在参数分析中，已经研究了空气/燃料摩尔比（输入到燃烧室）对系统性能的影响。如果燃烧室进入250.0kg / s，则系统的总热效率的总热效率的增加是56.15％的增加。参数分析结果还表明，除了增加系统的效率之外，由于进入空气量的减少，作为副产品的主要产物（热水和冷却）的主要产量的比率增加。

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