Investigating the interactive effects of different functional parameters of a heating, cooling and power cycle based on DOE method

IF 6.4 2区工程技术 Q1 THERMODYNAMICS Case Studies in Thermal Engineering Pub Date : 2025-04-01 Epub Date: 2025-02-10 DOI:10.1016/j.csite.2025.105853

Reza Hajipour , Elaheh Neshat , Ali Shokri Kalan

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Abstract

Cogeneration systems reduce fuel consumption and environmental pollutants. Optimizing these systems and operating existing equipment under optimal conditions further enhances fuel savings and pollution reduction. This study aims to investigate the interaction effects of functional parameters to identify the optimal operating conditions for all components. A new cogeneration system based on the methane-burning Brayton cycle, Kalina cycle, lithium-bromide cooling cycle, and a heating unit is designed. System performance is evaluated in terms of energy, exergy, and exergoeconomics. A parametric study identifies the optimal range of functional conditions with linear output changes, and the DOE method with fractional factorial design examines component interactions and their effects on system outputs. The most significant factors are the equivalence ratio and isentropic efficiency of compressors and the gas turbine, with their upper limits maximizing first and second-law efficiencies and the utilization factor. Analyzed using FORTRAN and Minitab, the system delivers 0.8 MW power, 0.4 MW cooling, and 1.2 MW heating, with energy and power costs of $16.53 and $51.19 per MWh. Multi-objective optimization improves exergy efficiency, reduces the total cost rate by 8.16 % to $110.76/hr, and lowers LCOP and cooling costs by 11.73 % and 4.15 %, respectively.

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基于DOE方法研究了加热、冷却和电源循环中不同功能参数的交互效应

热电联产系统减少了燃料消耗和环境污染。优化这些系统并在最佳条件下运行现有设备，进一步提高了燃料节约和减少污染。本研究旨在探讨功能参数的相互作用，以确定所有部件的最佳操作条件。设计了一种基于燃烧甲烷的Brayton循环、Kalina循环、溴化锂冷却循环和加热装置的新型热电联产系统。系统性能是根据能源、消耗和消耗经济学来评估的。参数研究确定了线性输出变化的功能条件的最佳范围，带有分数因子设计的DOE方法检查了组件相互作用及其对系统输出的影响。最重要的因素是压气机和燃气轮机的等效比和等熵效率，它们的上限使第一定律和第二定律效率以及利用系数最大化。通过FORTRAN和Minitab分析，该系统提供0.8兆瓦的电力，0.4兆瓦的冷却和1.2兆瓦的加热，每兆瓦时的能源和电力成本分别为16.53美元和51.19美元。多目标优化提高了火用效率，将总成本降低了8.16%，降至110.76美元/小时，LCOP和冷却成本分别降低了11.73%和4.15%。

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.