Economic Analyses of a New Power and Cooling System at Low Temperature Applications

IF 3.6 4区 工程技术 Q3 ENERGY & FUELS
Munisamy Omprakash, Narayanan Shankar Ganesh
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引用次数: 0

Abstract

Recent research suggests that the implementation of more efficient combined cooling and power systems, which enable the cogeneration of electricity and cooling, can enhance the efficiency of hybrid plants. The present investigation is motivated by finding that, in the literature review on combined power and cooling systems, there is very limited information on the coupling of the organic Rankine cycle (ORC) and the ejector refrigeration cycle (ERC) with low sink temperatures. A suggested approach to do this involves using hot exhaust gas and waste heat engines to power an ORC hybrid system. To enhance the ORC–ERC system's performance, three heater configurations use waste heat from the ORC turbine exhaust, ejector, and engine waste heat to heat the working fluid. Renewable energy sources are the primary focus of most current research initiatives. The present research focuses on unique ORC and ERC systems, considered as combined power and cooling systems, with the goal of improving exergy performance at low temperatures. The suggested ORC–ERC can generate energy destruction of 69.85 kW at a source temperature of 155 °C, with an exergetic efficiency of 76.9% at the turbine. Setting the entrainment ratio at 0.5 results in a total sum unit cost of products (SUCP) of 465 $/kW-h for the ORC–ERC. Furthermore, the 37.83% exergy destruction ratio introduces heat exchanger 2 (HE2) as the primary cause of the suggested ORC–ERC's irreversibility. A detailed parametric study reveals that altering the hot source temperature and entrainment ratio improves the system's SUCP. The current examination at high sink temperatures may be expanded to an advanced exergoenvironmental investigation.

Abstract Image

一种新型低温动力和冷却系统的经济分析
最近的研究表明,实施更有效的联合冷却和电力系统,使电力和冷却的热电联产,可以提高混合电厂的效率。本研究的动机是发现,在对联合动力和冷却系统的文献综述中,关于有机朗肯循环(ORC)和喷射器制冷循环(ERC)与低温的耦合的信息非常有限。一种建议的方法是使用热废气和废热发动机为ORC混合动力系统提供动力。为了提高ORC - erc系统的性能,三种加热器配置利用ORC涡轮排气余热、喷射器余热和发动机余热来加热工作液。可再生能源是目前大多数研究活动的主要焦点。目前的研究重点是独特的ORC和ERC系统,被认为是电力和冷却系统的组合,以提高低温下的火用性能。建议的ORC-ERC在155℃的源温度下可以产生69.85 kW的能量破坏,涡轮机的火用效率为76.9%。将夹带比设置为0.5,ORC-ERC的产品总单位成本(SUCP)为465美元/千瓦时。此外,37.83%的火用破坏率使得换热器2 (HE2)成为ORC-ERC不可逆性的主要原因。详细的参数研究表明,改变热源温度和夹带比可以提高系统的SUCP。目前在高汇温度下的检查可能会扩展到高级的燃烧环境调查。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Energy technology
Energy technology ENERGY & FUELS-
CiteScore
7.00
自引率
5.30%
发文量
0
审稿时长
1.3 months
期刊介绍: Energy Technology provides a forum for researchers and engineers from all relevant disciplines concerned with the generation, conversion, storage, and distribution of energy. This new journal shall publish articles covering all technical aspects of energy process engineering from different perspectives, e.g., new concepts of energy generation and conversion; design, operation, control, and optimization of processes for energy generation (e.g., carbon capture) and conversion of energy carriers; improvement of existing processes; combination of single components to systems for energy generation; design of systems for energy storage; production processes of fuels, e.g., hydrogen, electricity, petroleum, biobased fuels; concepts and design of devices for energy distribution.
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