Techno-economic and carbon footprint analyses of steam Rankine cycle

IF 1.4 4区 工程技术 Q3 ENGINEERING, CHEMICAL
Shu Yao Wong, Yick Eu Chew, Viknesh Andiappan, Shyam Lakshmanan, Dominic C. Y. Foo
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Abstract

Steam Rankine cycle (SRC), which is mainly utilised in power generation sector, faces external irreversibility in its daily operation causing inefficiency in the system. To address this issue, reheat Rankine cycle (RHRC) and regenerative Rankine cycle (RRC) have been widely studied and implemented in power plants to improve thermal efficiency and reduce external irreversibility of Rankine cycle. This study investigates the implementation of different RRC configurations in a combined heat and power plant, including RRC with modified thermal deaerator, RRC with open feed water heater (OFWH) and closed feed water heater (CFWH). A base case simulation model was first constructed using commercial simulation software Aspen HYSYS for the basic SRC system based on actual plant data. Various scenarios were then evaluated for their profitability and sustainability through techno-economic analysis (TEA) and carbon footprint analysis (CFA). From both analyses, the scenario of RRC with CFWH showed the greatest long-term potential, generating the highest annual profit of $ 771 691 and carbon footprint reduction of 14.63%, while RRC with modified thermal deaerator showed the greatest potential in the short run with the highest return of investment (ROI) of 201.51% and shortest payback period (PBP) of 0.50 year.

蒸汽朗肯循环的技术经济和碳足迹分析
主要用于发电行业的蒸汽朗肯循环(SRC)在日常运行中面临着外部不可逆问题,导致系统效率低下。为解决这一问题,发电厂广泛研究并实施了再热朗肯循环(RHRC)和再生朗肯循环(RRC),以提高热效率并降低朗肯循环的外部不可逆性。本研究调查了热电联产电厂中不同朗肯循环配置的实施情况,包括带改进型热力除氧器的朗肯循环、带开放式给水加热器(OFWH)的朗肯循环和带封闭式给水加热器(CFWH)的朗肯循环。首先使用商业仿真软件 Aspen HYSYS,根据电厂的实际数据为基本的 SRC 系统建立了一个基本情况仿真模型。然后,通过技术经济分析(TEA)和碳足迹分析(CFA)对各种方案的盈利能力和可持续性进行了评估。通过这两项分析,带有 CFWH 的 RRC 方案显示出最大的长期潜力,可产生最高的年利润 771 691 美元和减少 14.63% 的碳足迹,而带有改良热脱气机的 RRC 则显示出最大的短期潜力,投资回报率 (ROI) 最高,为 201.51%,投资回收期 (PBP) 最短,为 0.50 年。
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来源期刊
自引率
11.10%
发文量
111
期刊介绍: Asia-Pacific Journal of Chemical Engineering is aimed at capturing current developments and initiatives in chemical engineering related and specialised areas. Publishing six issues each year, the journal showcases innovative technological developments, providing an opportunity for technology transfer and collaboration. Asia-Pacific Journal of Chemical Engineering will focus particular attention on the key areas of: Process Application (separation, polymer, catalysis, nanotechnology, electrochemistry, nuclear technology); Energy and Environmental Technology (materials for energy storage and conversion, coal gasification, gas liquefaction, air pollution control, water treatment, waste utilization and management, nuclear waste remediation); and Biochemical Engineering (including targeted drug delivery applications).
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