Pub Date : 2023-01-01DOI: 10.1504/ijex.2023.129807
Karim Abd El Hakam A. Mohamed, Ali A.M. Hassan, Hussein M. Maghrabie
Energetic and exergetic analyses of a 626 MWe supercritical power plant-based mazout oil-fired are carried out to assess the system's performance. The energy losses and exergy destruction are evaluated for each system component using real actual data. The results show that the boiler is the primary source of irreversibility with 88.62% of the total exergy destruction. The intermediate pressure turbine maintains an exergy efficiency of 97% at 100%-load. Moreover, the maximum thermal efficiency is achieved at 100%-full load by 44.85% whereas, the maximum overall exergy efficiency of 40% is acquired at the maximum continuous rate condition of 105%-load.
{"title":"Performance assessment of supercritical power plant based oil fuel under sliding-pressure operation","authors":"Karim Abd El Hakam A. Mohamed, Ali A.M. Hassan, Hussein M. Maghrabie","doi":"10.1504/ijex.2023.129807","DOIUrl":"https://doi.org/10.1504/ijex.2023.129807","url":null,"abstract":"Energetic and exergetic analyses of a 626 MWe supercritical power plant-based mazout oil-fired are carried out to assess the system's performance. The energy losses and exergy destruction are evaluated for each system component using real actual data. The results show that the boiler is the primary source of irreversibility with 88.62% of the total exergy destruction. The intermediate pressure turbine maintains an exergy efficiency of 97% at 100%-load. Moreover, the maximum thermal efficiency is achieved at 100%-full load by 44.85% whereas, the maximum overall exergy efficiency of 40% is acquired at the maximum continuous rate condition of 105%-load.","PeriodicalId":50325,"journal":{"name":"International Journal of Exergy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135126763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1504/ijex.2023.10060085
Yongguang Xiang, Xiaogang Li, Xinru Zhang, Zeyi Jiang, Dijie Wang
{"title":"Numerical simulation and analysis of entropy generation and exergy equilibrium of the thermal process in a regenerative billet reheating furnace","authors":"Yongguang Xiang, Xiaogang Li, Xinru Zhang, Zeyi Jiang, Dijie Wang","doi":"10.1504/ijex.2023.10060085","DOIUrl":"https://doi.org/10.1504/ijex.2023.10060085","url":null,"abstract":"","PeriodicalId":50325,"journal":{"name":"International Journal of Exergy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135210915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1504/ijex.2023.10056724
Huiyi Mao, Zizhao Wang, Junlin Cheng
{"title":"Entropy generation analysis of fully developed turbulent convection in a twisted elliptical duct with constant heat flux","authors":"Huiyi Mao, Zizhao Wang, Junlin Cheng","doi":"10.1504/ijex.2023.10056724","DOIUrl":"https://doi.org/10.1504/ijex.2023.10056724","url":null,"abstract":"","PeriodicalId":50325,"journal":{"name":"International Journal of Exergy","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75702880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1504/ijex.2023.10056225
L. Ozgener, O. Ozgener, Zeynep Naz Ayvalı
{"title":"A parametric study on energy, exergy and exergoeconomic analysis of a paint curing oven","authors":"L. Ozgener, O. Ozgener, Zeynep Naz Ayvalı","doi":"10.1504/ijex.2023.10056225","DOIUrl":"https://doi.org/10.1504/ijex.2023.10056225","url":null,"abstract":"","PeriodicalId":50325,"journal":{"name":"International Journal of Exergy","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80724836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1504/ijex.2023.10053575
V. Lebedev, E. Yushkova
{"title":"The use of pinch analysis technology to assess the energy efficiency of oil refining technologies","authors":"V. Lebedev, E. Yushkova","doi":"10.1504/ijex.2023.10053575","DOIUrl":"https://doi.org/10.1504/ijex.2023.10053575","url":null,"abstract":"","PeriodicalId":50325,"journal":{"name":"International Journal of Exergy","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78923185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1504/ijex.2023.128522
Ibrahim Ozsari
This study examines the contributions of researchers from around the world in the field of exergy over the past 30 years (1/1/1992-1/1/2022). Various aspects of the studies have been analysed such as publication type, research areas, and keywords. In addition, countries, authors, journals, and institutions that have worked in the field of exergy were examined. Thus, the detailed results of the five most influential authors, seven journals, and 15 institutions in the field of exergy in terms of publication, citation, PIP, and h-indexes are presented over the years. The effects of all countries broadcasting from the field of exergy in terms of publication and citation are shown. As a result of the analysis of all parameters, it has been shown that the most effective countries are China, Iran, and Turkey. Besides, it has been determined that Dr. Ibrahim Dincer is the most influential author in the terms of contributing authors.
{"title":"Historical research trends and overview about exergy: a comprehensive analysis","authors":"Ibrahim Ozsari","doi":"10.1504/ijex.2023.128522","DOIUrl":"https://doi.org/10.1504/ijex.2023.128522","url":null,"abstract":"This study examines the contributions of researchers from around the world in the field of exergy over the past 30 years (1/1/1992-1/1/2022). Various aspects of the studies have been analysed such as publication type, research areas, and keywords. In addition, countries, authors, journals, and institutions that have worked in the field of exergy were examined. Thus, the detailed results of the five most influential authors, seven journals, and 15 institutions in the field of exergy in terms of publication, citation, PIP, and h-indexes are presented over the years. The effects of all countries broadcasting from the field of exergy in terms of publication and citation are shown. As a result of the analysis of all parameters, it has been shown that the most effective countries are China, Iran, and Turkey. Besides, it has been determined that Dr. Ibrahim Dincer is the most influential author in the terms of contributing authors.","PeriodicalId":50325,"journal":{"name":"International Journal of Exergy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135534695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Green ammonia is a promising carbon-free energy vector and means to store hydrogen efficiently. Employing the software Aspen Plus®, this work presents an exergetic comparison of a novel small-scale power-to-ammonia system, to be tested in 2023 and designed for low investment cost and dynamic flexibility, to a conventional system. For a thorough evaluation six equations of state, one provided by an industry partner, as well as chemical exergies with and without excess values are compared. With 64.59%, the novel design has a 4.87% lower exergetic degree of efficiency. The difference can be attributed to the simplified design of the novel cycle, mainly to the use of an electrical preheater instead of an internal gas-gas heat exchanger and a recycle valve instead of a recycle compressor. However, an upcoming exergy economic analysis will show that the novel cycle is more economical overall, as its investment costs are lower.
{"title":"Exergetic comparison of a novel to a conventional small-scale power-to-ammonia cycle","authors":"Pascal Koschwitz, Daria Bellotti, Cheng Liang, Bernd Epple","doi":"10.1504/ijex.2023.134607","DOIUrl":"https://doi.org/10.1504/ijex.2023.134607","url":null,"abstract":"Green ammonia is a promising carbon-free energy vector and means to store hydrogen efficiently. Employing the software Aspen Plus®, this work presents an exergetic comparison of a novel small-scale power-to-ammonia system, to be tested in 2023 and designed for low investment cost and dynamic flexibility, to a conventional system. For a thorough evaluation six equations of state, one provided by an industry partner, as well as chemical exergies with and without excess values are compared. With 64.59%, the novel design has a 4.87% lower exergetic degree of efficiency. The difference can be attributed to the simplified design of the novel cycle, mainly to the use of an electrical preheater instead of an internal gas-gas heat exchanger and a recycle valve instead of a recycle compressor. However, an upcoming exergy economic analysis will show that the novel cycle is more economical overall, as its investment costs are lower.","PeriodicalId":50325,"journal":{"name":"International Journal of Exergy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135263178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1504/ijex.2023.134608
Ho Young Kwak
{"title":"Integrative approach of thermoeconomics to obtain unit cost of products in power systems","authors":"Ho Young Kwak","doi":"10.1504/ijex.2023.134608","DOIUrl":"https://doi.org/10.1504/ijex.2023.134608","url":null,"abstract":"","PeriodicalId":50325,"journal":{"name":"International Journal of Exergy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135263321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1504/ijex.2023.133994
Tawfiq Al Mughanam, Abdul Khaliq
{"title":"Thermodynamic investigation of a novel synergetic integration of solar-based Kalina cycle and ejector refrigeration cycle","authors":"Tawfiq Al Mughanam, Abdul Khaliq","doi":"10.1504/ijex.2023.133994","DOIUrl":"https://doi.org/10.1504/ijex.2023.133994","url":null,"abstract":"","PeriodicalId":50325,"journal":{"name":"International Journal of Exergy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136209064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1504/ijex.2023.133998
Aman Sharma, Vijay Kumar Bajpai
{"title":"Performance enhancement and exergy analysis of an aluminium reflector-assisted modification in existing PV system","authors":"Aman Sharma, Vijay Kumar Bajpai","doi":"10.1504/ijex.2023.133998","DOIUrl":"https://doi.org/10.1504/ijex.2023.133998","url":null,"abstract":"","PeriodicalId":50325,"journal":{"name":"International Journal of Exergy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136209293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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