Multi-level eco-friendly heat recovery process integrated into a gas turbine cycle of an innovative CCHP-desalination system: Assessment and optimization of the thermo-economic-environmental aspects

IF 8.3 1区 工程技术 Q1 ENGINEERING, CHEMICAL Desalination Pub Date : 2024-11-22 DOI:10.1016/j.desal.2024.118323
Lu Sui , Qili Zhou , Theyab R. Alsenani , Sayed Fayaz Ahmad , Taseer Muhammad , Mahdi Pourtadayyon
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Abstract

Concerning the high energy loss associated with benchmark gas turbine cycles and relative irreversibility, research on how this drawback can be controlled and managed for long-term sustainability, enhanced performance, and declined emissions of greenhouse gases is essential. In this context, a novel multi-level thermal recovery method is designed and introduced for a gas turbine cycle, aimed at simultaneously yielding electricity, hot and chilled water, hydrogen, and desalinated water. The planned setup encompasses an ammonia Rankine cycle, an organic Rankine cycle, an absorption chiller, a desalination unit, and a proton exchange membrane electrolyzer, resulting in reduced irreversibility and emissions. The system's capability is examined concerning exergy, energy, environmental, and economic aspects using Aspen HYSYS software. Furthermore, a comparative study is conducted between different optimization scenarios. According to the attained outcomes, maximizing vapor production requires a reduction in seawater flow. Additionally, increasing the seawater flow rate is ineffective in the proposed process, as vapor from the desalination unit drives heat transfer. Regarding the optimizations conducted, the most suitable exergy efficiency is found to be 39.27 %, which corresponds to the exergy-power scenario. Moreover, the optimal net electric power, and cooling and heating loads are calculated at 18,255 kW, 4383 kW, and 15,280 kW, respectively; thus, the optimal energy efficiency is 74.51 %. From economic and environmental perspectives, the optimal cost of energy and CO2 footprint are 0.76 $/kWh and 0.255 kg/kWh, correspondingly.
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集成到创新cchp -脱盐系统的燃气轮机循环中的多级环保热回收过程:热经济环境方面的评估和优化
关于基准燃气轮机循环和相对不可逆性相关的高能量损失,研究如何控制和管理这一缺点以实现长期可持续性,提高性能和减少温室气体排放至关重要。在此背景下,设计并介绍了一种用于燃气轮机循环的新型多级热回收方法,旨在同时产生电力,热水和冷冻水,氢气和淡化水。计划中的装置包括一个氨朗肯循环、一个有机朗肯循环、一个吸收式冷却器、一个脱盐装置和一个质子交换膜电解槽,从而减少不可逆性和排放。使用Aspen HYSYS软件,从能源、能源、环境和经济方面对系统的能力进行了检查。并对不同优化方案进行了对比研究。根据获得的结果,最大化蒸汽产生需要减少海水流量。此外,在拟议的过程中,增加海水流速是无效的,因为来自海水淡化装置的蒸汽驱动传热。优化后的最适火用效率为39.27%,与火用-动力方案相对应。最优净功率为18255 kW,最优冷热负荷为4383 kW,最优净负荷为15280 kW;因此,最优能源效率为74.51%。从经济和环境的角度来看,最优的能源成本和二氧化碳足迹分别为0.76美元/千瓦时和0.255千克/千瓦时。
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来源期刊
Desalination
Desalination 工程技术-工程:化工
CiteScore
14.60
自引率
20.20%
发文量
619
审稿时长
41 days
期刊介绍: Desalination is a scholarly journal that focuses on the field of desalination materials, processes, and associated technologies. It encompasses a wide range of disciplines and aims to publish exceptional papers in this area. The journal invites submissions that explicitly revolve around water desalting and its applications to various sources such as seawater, groundwater, and wastewater. It particularly encourages research on diverse desalination methods including thermal, membrane, sorption, and hybrid processes. By providing a platform for innovative studies, Desalination aims to advance the understanding and development of desalination technologies, promoting sustainable solutions for water scarcity challenges.
期刊最新文献
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