Multi- objective optimization and life cycle assessment of a cascade system integrating LiBr/H2O absorption refrigeration with transcritical CO2 power cycle
Multi- objective optimization and life cycle assessment of a cascade system integrating LiBr/H2O absorption refrigeration with transcritical CO2 power cycle
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DOI：
10.1016/j.enconman.2021.114453
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发表时间：
2021-09
影响因子：
10.4
通讯作者：
Pei-zhi Yang;Mingxuan Yuan;Zhiqiang Liu;Nan Xie;Yongjian Liu;Sheng Yang
中科院分区：
文献类型：
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作者：
Pei-zhi Yang;Mingxuan Yuan;Zhiqiang Liu;Nan Xie;Yongjian Liu;Sheng Yang
对吸收式制冷（AR）与跨临界CO2动力循环（TCPC）复叠式低品位余热回收系统进行了能量、经济和环境（3E）分析。生命周期评价（LCA）是对环境绩效进行评价的一种方法。提出了一种新的综合指数生态指标16（EI 16），它综合了人类健康、生态系统和资源等17种环境影响。建立了以热效率、年总费用和环境影响指数为目标函数的多目标优化模型，并采用非支配排序遗传算法Ⅱ（NSGA-II）进行求解。采用逼近理想解的排序法（TOPSIS）和香农熵法进行决策，得到最终的最优解。结果表明，投资回收期可在7年以内，能源效率与环境绩效之间存在协同关系，而能源效率与经济绩效之间是相互矛盾的。最终的优化方案在年总成本增加8.94%的情况下，实现了热效率提高13.17%，生态指标16降低13.49%。在所有环境影响类别中，对气候变化的贡献最大，有利于人类健康和生态系统保护。
Energy, economic and environmental (3E) analysis of a cascade system combining absorption refrigeration (AR) and transcritical CO2power cycle (TCPC) for low-grade waste heat recovery (WHR) is conducted. Life cycle assessment (LCA) is applied to evaluate environmental performance. A novel comprehensive index Eco-indicator 16 (EI16) integrating seventeen environmental impacts was proposed which involves human health, ecosystem and resource. A multi-objection optimization model with thermal efficiency, annual total cost and EI16 as three objection functions is established and solved by Non-dominated sorting genetic algorithm II (NSGA-II). The final optimal solution is obtained after decision making with Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) and Shannon entropy method. The results show that payback time can be less than 7 years and there is a synergistic relationship between energy efficiency and environmental performance, while energy efficiency and economic performance are mutually contradictory. The final optimal solution achieves an increase by 13.17% in thermal efficiency and a decrease by 13.49% in Eco-indicator 16 at cost of an 8.94% increase in annual total cost. In all environmental impact categories, the contribution to the climate change is the largest, which is beneficial to the human health and ecosystem protection.