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Techno-economic optimization of ORC system structure, size and working fluid within biomass-fired municipal cogeneration plant retrofitting project

机译：兽人系统结构，尺寸和工作流体的技术经济优化，生物染色的城市热电农厂改造项目改造项目

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This paper continues discussion on financial viability and design optimisation of biomass-fired Organic Rankine Cycle (ORC) Combined Heat and Power (CHP) systems. It examines influence of such decision variables as ORC system rated electric power output, architecture and working fluid. The considered ORC system structures are simple, regenerative and regenerative cycle with split heat exchanger. Eight working fluids are considered, namely: MM, MDM, MD2M, D4, D5, toluene, ethylbenzene, and cyclohexane. The system was modelled and simulated using Ebsilon (R) Professional software. Sample project is assessed in terms of power generation efficiency, Primary Energy Savings (PES), and financial indicators, such as Net Present Value (NPV) and Internal Rate of Return (IRR). Results revealed considerable differences in optimal power output. The optimal value of the ORC generator power output in terms of NPV is within the range from 1000 to 2600 kW depending on the system configuration and the working fluid. In terms of IRR the optimal rated power is between 750 and 1400 kW. The highest values of nominal rated power output have been obtained for ethylbenzene. What is more, the economic indicators get higher values for hydrocarbons than for silicone oils, which are nowadays widely used in biomass fired ORC systems. (c) 2021 Elsevier Ltd. All rights reserved.
机译：本文继续讨论生物质烧制的有机朗肯循环（ORC）组合热量和功率（CHP）系统的金融活力和设计优化。它检查了这种决策变量作为ORC系统额定电力输出，架构和工作流体的影响。所考虑的兽人系统结构简单，再生和再生循环，具有分体式热交换器。考虑八个工作流体，即：Mm，MDM，MD2M，D4，D5，甲苯，乙苯和环己烷。系统使用EBSILON（R）专业软件进行建模和模拟。在发电效率，初级节能（PE）和财务指标方面评估示例项目，例如净目前价值（NPV）和内部回报率（IRR）。结果显示出最佳功率输出的相当大的差异。根据系统配置和工作流体，NPV在NPV方面的最佳值在NPV方面的最佳值在1000至2600kW的范围内。就IRR，最佳额定功率为750和1400 kW。已经获得了乙苯的标称额定功率输出的最高值。更重要的是，经济指标对碳氢化合物的烃较高，这是硅油，现在广泛用于生物质烧制的兽人系统。 （c）2021 elestvier有限公司保留所有权利。

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