跨临界CO2联合冷却与动力系统的热经济优化

IF 7.6 Q1 ENERGY & FUELS

Energy Conversion and Management-X Pub Date : 2025-10-01 DOI:10.1016/j.ecmx.2025.101292

Somayeh Fathi, Rahim Khoshbakhti Saray , Ali Tavakol Aghaei

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引用次数: 0

摘要

所提出的系统是一个冷却和动力（CCP）联合系统，包括跨临界CO2朗肯循环和跨临界CO2冷却循环。为了从能源、火用和火用经济的角度分析该循环的性能，建立了该循环的综合热力学和热经济模型。研究结果表明，相当一部分的火用破坏发生在电力循环中，特别是在燃气加热器中。此外，制冷循环中的平均火用成本高于动力循环中的平均火用成本。为优化系统性能，采用MATLAB软件中基于遗传算法的多目标优化方法，考虑11个决策变量，以产品的用能效率和单位用能平均成本为目标函数。结果表明，优化后的产品用能效率由基本情况下的32.08%提高到最优情况下的44.15%，产品单位用能平均成本由基本情况下的0.1544美元/MJ降低到最优情况下的0.111美元/MJ。这些优化表明了提高所提议的CCP系统的整体效率和成本效益的潜力。

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Thermoeconomic optimization of a transcritical CO2 combined cooling and power system

The proposed system is a Combined Cooling and Power (CCP) system, comprising both the transcritical CO₂ Rankine cycle and the transcritical CO₂ cooling cycle. In order to analyze the cycle’s performance from energy, exergy, and exergoeconomic perspectives, a comprehensive thermodynamic and thermoeconomic model of the cycle was developed. The findings revealed that a significant portion of exergy destruction occurs within the power cycle, particularly in the gas heater. Moreover, the average exergy cost in the refrigeration cycle was observed to be higher than that in the power cycle. To optimize the system’s performance, a Multi-Objective Optimization method using a genetic algorithm in MATLAB software was employed, considering 11 decision variables and using the objective functions of exergy efficiency and average cost per unit of exergy of products. The results demonstrated noteworthy improvements, with the exergy efficiency increasing from 32.08% in the base case to 44.15% in the optimal case, and the average cost per unit of exergy of products decreasing from 0.1544 $/MJ in the base case to 0.111 $/MJ in the optimal case. These optimizations signify the potential for enhancing the overall efficiency and cost-effectiveness of the proposed CCP system.

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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.