从能源角度看生物质驱动的多联产系统的环境和经济可行性

IF 7.1 Q1 ENERGY & FUELS

Energy Conversion and Management-X Pub Date : 2025-03-10 DOI:10.1016/j.ecmx.2025.100961

Parviz Heydari Nasab , Ata Chitsaz , Hiva Rashidzadeh , Alireza Rostamzadeh Khosroshahi

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引用次数: 0

摘要

越来越多地采用创新方法来评估工业过程的可持续性、环境影响和经济可行性。在这些方法中，能值分析已成为一种综合性的工具。本研究探讨了一个主要由生物质气化（利用城市固体废物）驱动的多系统，以产生电力、供暖、制冷和淡水。气化过程采用布雷顿循环，辅以天然气，以提高气体混合物的热值。对于冷却，双效吸收式制冷机系统利用燃气轮机的余热，与单效系统相比，提供了优越的性能。此外，24级多闪蒸（MSF）装置产生淡水，气化装置的散热量用于产生的加热。系统的性能通过EES软件中的热力学建模进行评估，同时通过能量分析来确定经济和环境参数。评估的关键指标包括能源产出比（EYR）、能源投资比（EIR）、环境负荷比（ELR）、可再生能源和能源可持续指数（ESI）。关键变量，如气体流量（GMR），等效比（ER），气化温度（Tgh），燃烧室温度（Tcc）和燃烧室压力（Pcc）进行了检查。基于可靠来源对子系统进行了单独验证，最后对系统进行了评估。结果表明，系统总能值为2.03E + 20，各变量的最大可持续性指数分别为8.5、6.81、6.2、6.13和6.6。净输出功率达到18.756兆瓦。然而，随着变量值的增加，系统可持续性下降，而净功率输出提高。这项研究展示了生物质系统作为可持续能源解决方案的潜力，同时强调了效率和环境影响之间的权衡。

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Emergy Perspective on the environmental and economic Viability of a Biomass-Driven Polygeneration system

Innovative methods have been increasingly adopted to evaluate industrial processes’ sustainability, environmental impact, and economic feasibility. Among these approaches, emergy analysis has emerged as a comprehensive tool. This study investigates a multiple system driven primarily by biomass gasification (using municipal solid waste) to generate power, heating, cooling, and freshwater. The gasification process incorporates a Brayton cycle, supplemented by natural gas to enhance the thermal value of the gas mixture. For cooling, a double-effect absorption chiller system utilizes the waste heat from the gas turbine, offering superior performance compared to single-effect systems. Additionally, a 24-stage Multi-Flash Distillation (MSF) unit produces freshwater, and the gasification unit’s dissipated heat is used for generated heating. The system’s performance was assessed using thermodynamic modeling in EES software, alongside an emergy analysis to determine economic and environmental parameters. Key metrics evaluated included the Emergy Yield Ratio (EYR), Emergy Investment Ratio (EIR), Environmental Loading Ratio (ELR), renewability, and Emergy Sustainability Index (ESI). Critical variables such as Gas Flow Rate (GMR), Equivalence Ratio (ER), Gasification Temperature (T_gh), Combustion Chamber Temperature (T_cc), and Combustion Chamber Pressure (P_cc) were examined. The subsystems were individually validated based on credible sources, and finally, the system was evaluated. Results indicated that the total emergy value of the system was 2.03E + 20, with maximum sustainability indices of 8.5, 6.81, 6.2, 6.13, and 6.6 across the system’s variables, respectively. The net power output reached 18.756 MW. However, as variable values increased, system sustainability decreased while net power output improved. This study demonstrates the potential of biomass-based systems for sustainable emergy solutions while highlighting the trade-offs between efficiency and environmental impact.

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来源期刊

Energy Conversion and Management-X Multiple-

CiteScore

8.80

自引率

3.20%

发文量

180

审稿时长

58 days

期刊介绍： Energy Conversion and Management: X is the open access extension of the reputable journal Energy Conversion and Management, serving as a platform for interdisciplinary research on a wide array of critical energy subjects. The journal is dedicated to publishing original contributions and in-depth technical review articles that present groundbreaking research on topics spanning energy generation, utilization, conversion, storage, transmission, conservation, management, and sustainability. The scope of Energy Conversion and Management: X encompasses various forms of energy, including mechanical, thermal, nuclear, chemical, electromagnetic, magnetic, and electric energy. It addresses all known energy resources, highlighting both conventional sources like fossil fuels and nuclear power, as well as renewable resources such as solar, biomass, hydro, wind, geothermal, and ocean energy.