Effatpanah Saeed Khojaste, Ahmadi Mohammad Hossein, Delbari Seyed Hamid, Lorenzini Giulio
Faculty of Mechanical and Mechatronics Engineering, Shahrood University of Technology, Shahrood 3619995161, Iran.
Department of Renewable Energies and Environmental, Faculty of New Sciences and Technologies, University of Tehran, Tehran 1439957131, Iran.
Entropy (Basel). 2022 Jan 28;24(2):209. doi: 10.3390/e24020209.
In recent decades, there has been an increasing trend toward the technical development of efficient energy system assessment tools owing to the growing energy demand and subsequent greenhouse gas emissions. Accordingly, in this paper, a comprehensive emergy-based exergoeconomic (emergoeconomic) method has been developed to study the biomass combustion waste heat recovery organic Rankine cycle (BCWHR-ORC), taking into account thermodynamics, economics, and sustainability aspects. To this end, the system was formulated in Engineering Equation Solver (EES) software, and then the exergy, exergoeconomic, and emergoeconomic analyses were conducted accordingly. The exergy analysis results revealed that the evaporator unit with 55.05 kilowatts and the turbine with 89.57% had the highest exergy destruction rate and exergy efficiency, respectively. Based on the exergoeconomic analysis, the cost per exergy unit (c), and the cost rate (C˙) of the output power of the system were calculated to be 24.13 USD/GJ and 14.19 USD/h, respectively. Next, by applying the emergoeconomic approach, the monetary emergy content of the system components and the flows were calculated to evaluate the system's sustainability. Accordingly, the turbine was found to have the highest monetary emergy rate of capital investment, equal to 5.43×1012 sej/h, and an output power monetary emergy of 4.77×104 sej/J. Finally, a sensitivity analysis was performed to investigate the system's overall performance characteristics from an exergoeconomic perspective, regarding the changes in the transformation coefficients (specific monetary emergy).
近几十年来，由于能源需求不断增长以及随之而来的温室气体排放，高效能源系统评估工具的技术开发呈上升趋势。因此，本文开发了一种基于能值的综合（火用）经济（能值经济）方法，以研究生物质燃烧余热回收有机朗肯循环（BCWHR-ORC），同时考虑热力学、经济学和可持续性等方面。为此，在工程方程求解器（EES）软件中建立了该系统模型，然后据此进行了（火用）分析、（火用）经济分析和能值经济分析。（火用）分析结果表明，蒸发器单元的（火用）损失率最高，为55.05千瓦，而涡轮机的（火用）效率最高，为89.57%。基于（火用）经济分析，系统输出功率的单位（火用）成本（c）和成本率（C˙）分别计算为24.13美元/吉焦和14.19美元/小时。接下来，通过应用能值经济方法，计算了系统组件和物流的货币能值含量，以评估系统的可持续性。因此，发现涡轮机的资本投资货币能值率最高，等于5.43×1012 sej/h，输出功率货币能值为4.77×104 sej/J。最后，进行了敏感性分析，以从（火用）经济角度研究系统的整体性能特征，考虑转换系数（特定货币能值）的变化。
