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首页> 外文期刊>Energy Conversion & Management >Proposal and 3E (energy, exergy, and exergoeconomic) assessment of acogeneration system using an organic Rankine cycle and an Absorption Refrigeration System in the Northeast Brazil: Thermodynamic investigation of a facility case study
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Proposal and 3E (energy, exergy, and exergoeconomic) assessment of acogeneration system using an organic Rankine cycle and an Absorption Refrigeration System in the Northeast Brazil: Thermodynamic investigation of a facility case study

机译：在巴西东北巴西的有机朗肯循环和吸收制冷系统的喘气系统的提案和3E（能量，漏洞和exergo经济）评估：对设施案例研究的热力学调查

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This paper proposes a cogeneration system to achieve the partial electric and thermal demands of a building in the public University. This proposed system comprises an Internal Combustion Engine (ICE), an organic Rankine cycle (ORC), and equipment that will operate as a sink. For the latter, two types of equipment were selected: a cooling tower and an Absorption Refrigeration System (ARS). The building selected to propose the cogeneration system is the Institute of Sustainable Energies (IES), located at the Federal University of Paraiba (UFPB), in the Northeast of Brazil. The performance of the system based on energetic and exergetic points of view operating under two distinct modes; ORC Simple (ORC-S) and ORC Combined (ORC-C), was compared. Both modes are based on the energy availability of the ICE exhaust gases. The thermodynamic models for both modes were developed based on the first and second laws of thermodynamic considering input parameters, such as inlet temperature, pressure ratio, and outlet temperature of the expander and the cold-water storage tank. For the exergoeconomic technique, the SPECO Method (Specific Exergy Costing) was used and implemented along with the Thermodynamic model. The ORC system studied uses a scroll expander and operates with R-134a as the working fluid and water/ammonia pair for the single-effect ARS. The results showed that the ORC-C mode can meet from 18.9% to 37.5% of the IES electricity demand, while the ORC-S mode can meet from 12.4% to 24.5%. The thermodynamic analysis reported that the ORC-C allowed a 33.6% increase in mechanical power production, an increase from approximately 4.5% to 34.5% in energy efficiency as well as exergy efficiencies around 40% and reduction of the total destroyed exergy. From the exergoeconomic point of view, the specific cost of the chilled water has a slight influence on the total cost of the products, while the specific cost of hot water has a strong influence on the total cost of the products (a variation of approximately 46% for a distinct heat source).
机译：本文提出了一种热电联产系统，实现公立大学建筑物的部分电气和热需求。该提出的系统包括内燃机（ICE），有机朗肯循环（ORC），以及将作为水槽运行的设备。对于后者，选择了两种类型的设备：冷却塔和吸收制冷系统（ARS）。选择为提出热电联产权的建筑是在巴西东北部位于巴西东北部的联邦帕拉伯（UFPB）的可持续能量（IES）。基于精力充沛的和前视角的系统的性能下两种不同模式运行;比较ORC简单（ORC-S）和ORC组合（ORC-C）。两种模式都基于冰废气的能量可用性。两种模式的热力学模型是基于考虑输入参数的第一和第二热力学定律，例如膨胀机和冷水储罐等入口温度，压力比和出口温度。对于exergo经济技术，使用并与热力学模型一起使用并实现了具体化方法（具体的电容耗时）。研究使用滚动膨胀机并用R-134a作为工作流体和水/氨对操作，用于单效ars。结果表明，ORC-C模式可满足IES电量的18.9％至37.5％，而ORC-S模式可满足12.4％至24.5％。热力学分析报道，ORC-C允许增加33.6％的机械电力产量，从能效增加约4.5％至34.5％，以及高达40％的效率，并减少总被摧毁的爆炸。从exergo经济的角度来看，冷却水的具体成本对产品的总成本略有影响，而热水的具体成本对产品的总成本有很大影响（约46的变化不同热源的％）。

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