Renewable Energy and Power Quality Journal最新文献_第4页

Evaluation of the Potential of Ethyl Esterification Reaction Catalyzed by Enzyme to Improve the Quality of Bio-Oil 酶催化乙基酯化反应提高生物油品质的潜力评价

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.254

Candida Luiza Simonato, A. Gonçalves, Bruno Eduardo Piske, Luana Marcele Chiarello, V. Botton, Laércio Endre, Vinicyus Rodolfo Wiggers

{"title":"Evaluation of the Potential of Ethyl Esterification Reaction Catalyzed by Enzyme to Improve the Quality of Bio-Oil","authors":"Candida Luiza Simonato, A. Gonçalves, Bruno Eduardo Piske, Luana Marcele Chiarello, V. Botton, Laércio Endre, Vinicyus Rodolfo Wiggers","doi":"10.24084/repqj21.254","DOIUrl":"https://doi.org/10.24084/repqj21.254","url":null,"abstract":"Biomass has been investigated in recent years as an alternative source for fuel production. The use of triglyceride biomass is highlighted and, from the thermal cracking process, solid, liquid and gaseous products with energetic potential are generated. The liquid product, called bio-oil, has characteristics similar those of fossil fuels. Its composition is mainly based on hydrocarbons and carboxylic acids, and the second group generates a limiting characteristic in its processing, refining and use as fuel, increasing the acidity of bio-oil. In this work, bio-oil produced from commercial soybean oil was used in a thermal cracking process at 525ºC. The objective was to carry out ethyl esterification reactions via enzymatic catalysis in order to reduce the acidity index of the crude bio-oil. All reactions were carried out at 40ºC to avoid enzyme deactivation and different conditions of type and amount of catalyst, alcohol mass ratio and reaction time were evaluated. The best result was obtained after 6 hours of reaction with 60% acidity reduction, using Novozym 435 lipase as a catalyst at a concentration of 5% in relation to the substrate mass and 1:3 mass ratio.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83089431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling Wind Turbine Power Curves based on Frank’s copula 基于弗兰克公式的风力发电机功率曲线建模

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.378

M.A. Garcia-Vaca, J. Sierra-García, M. Santos, Ravi Kumar Pandit

引用次数: 0

Technical-economic feasibility analysis of a large-scale parabolic trough collectors solar power plant in Brazil 巴西大型抛物面槽集热器太阳能电站技术经济可行性分析

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.316

M. Lopes, G. Acevedo, B. Menezes, O.H.F. Rabelo, L. B. Brito, A. B. Dias, A. Filho, E. G. Domingues

{"title":"Technical-economic feasibility analysis of a large-scale parabolic trough collectors solar power plant in Brazil","authors":"M. Lopes, G. Acevedo, B. Menezes, O.H.F. Rabelo, L. B. Brito, A. B. Dias, A. Filho, E. G. Domingues","doi":"10.24084/repqj21.316","DOIUrl":"https://doi.org/10.24084/repqj21.316","url":null,"abstract":"This study aims to present the results of the application of a computational tool developed to perform a technical-economic feasibility analysis of large-scale Parabolic Trough Collectors (PTC) solar power plants in Brazil. The gross revenue from cash flow is obtained through an energy trading model for the Regulated Contracting Environment of the Brazilian Electricity Market. The economic viability analysis uses the Net Present Value, Modified Internal Rate of Return, Discounted Payback, and Levelized Cost of Energy indicators. The parametric structural optimization method is used to optimize the technical parameters of the plant. A case study was conducted to analyse the feasibility of implementing a 100 MW PTC in the five regions of Brazil. The results indicated that the best region in Brazil to receive this technology is the northeastern region. However, the project is economically unfeasible in all cities analysed. Therefore, a sensitivity analysis of the main parameters that affect the project's net present value is carried out to evaluate the impact of the economic parameters on the economic viability of an optimized PTC plant located in the city with the best technical performance. An optimistic scenario was evaluated considering the system's response to the parameters investigated in the sensitivity analysis. For this scenario, the results pointed to the project's economic viability.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91080109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Utility-scale renewable hydrogen generation by wind turbines 利用风力涡轮机生产公用事业规模的可再生氢

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.208

R. Dufo-López, J. Lujano-Rojas, J. Bernal-Agustín, J. S. Artal-Sevil, Á. Bayod-Rújula, Tomás Cortés-Arcos, Javier Carroquino Oñate, Cristina Escriche Martínez

引用次数: 0

Inverter Control Design for the optimal management of electrical Microgrids 微电网优化管理的逆变器控制设计

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.310

J. R. Vazquez, N. Magro, R. S. Herrera, A. Martin

引用次数: 0

Performance of an OVT inverter reliant on the switching frequency of the filtering inverter OVT逆变器的性能依赖于滤波逆变器的开关频率

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.450

A. Muc, J. Iwaszkiewicz

{"title":"Performance of an OVT inverter reliant on the switching frequency of the filtering inverter","authors":"A. Muc, J. Iwaszkiewicz","doi":"10.24084/repqj21.450","DOIUrl":"https://doi.org/10.24084/repqj21.450","url":null,"abstract":"The paper presents an inverter based on the orthogonal space vectors theory (OVT inverter) and its performance. The OVT inverter consists of two constituent twolevel 3-phase inverters: the main inverter (MI) and the auxiliary one (AI). The MI is controlled in a simple way to generate the stepped output voltage and the AI works as an active filter limiting the higher harmonics in the OVT output voltage. The filtering process is formed by the use of the orthogonal space vector theory. The output voltage of the OVT inverter takes the shape of a stepped voltage comparable to the voltage generated by multilevel inverters. The AI operates as a very effective active power filter (APF) of the OVT inverter output voltage. The AI power is significantly lower in comparison to the MI power nevertheless its switching frequency affects the OVT performance. The article describes studies in which the impact of changes in the switching frequency filter inverter on the operation of the orthogonal inverter and the output voltage THD. Increasing the filter inverter switching frequency improved performance and reduced the transformer size, which acts as a summing node.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"153 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81726882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Alternative Uses of Hydroelectric Power Plants in a Decarbonized Energy Scenario 脱碳能源情景下水力发电厂的替代用途

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.368

M. Remiro-Cinca, L. Elorza-Uriarte, G. Fernández, L. Luengo-Baranguan, D. Martinez, N. Galán Hernández

{"title":"Alternative Uses of Hydroelectric Power Plants in a Decarbonized Energy Scenario","authors":"M. Remiro-Cinca, L. Elorza-Uriarte, G. Fernández, L. Luengo-Baranguan, D. Martinez, N. Galán Hernández","doi":"10.24084/repqj21.368","DOIUrl":"https://doi.org/10.24084/repqj21.368","url":null,"abstract":"Drastic reduction of greenhouse gases emissions depends, among other factors, on a quick and efficient integration of renewable sources in the energy generation pool. In this context, hydropower nowadays represents the biggest share of the world renewable energy generation. However, in the case of European Union, many hydropower plants are about to reach their end-of-life stage and environmental regulations on the recovery of natural water flows require these plants to be dismantled. In the controversial scenario where the need to recover natural waterflows and the loss of a key source of green energy clash with each other, the objective of this work is to provide an exhaustive review of the different auxiliary services that hydropower plants can provide in the current and especially future decarbonized electricity paradigm. To this end, services such as participation in secondary and tertiary regulation markets, power purchase agreements, local energy communities, reduction of curtailments, renewable energy storage or contribution to physical inertia to the grid are analyzed and final conclusions are drawn.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83881167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic energy prices for residential users based on Deep Learning prediction models of consumption and renewable generation 基于消费和可再生能源发电深度学习预测模型的住宅用户动态能源价格

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.226

J. Cano-Martínez, E. Peñalvo-López, V. León-Martínez, I. Valencia-Salazar

引用次数: 0

Reducing Fossil Fuel Consumption by Incorporating Renewable Energy Sources in Wastewater Treatment Processes 通过在废水处理过程中使用可再生能源来减少化石燃料的消耗

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.360

H. Friman

{"title":"Reducing Fossil Fuel Consumption by Incorporating Renewable Energy Sources in Wastewater Treatment Processes","authors":"H. Friman","doi":"10.24084/repqj21.360","DOIUrl":"https://doi.org/10.24084/repqj21.360","url":null,"abstract":"Various types of aqueous solutions are disposed of in residential, institutional, commercial, and industrial buildings. The wastewater must be treated to remove pathogens (bacteria, viruses), nutrients (nitrogen, phosphorus), and other compounds in order to maintain public health and the environment. Accumulation of untreated sewage can result in a wide range of nuisances. Most of Israel's wastewater is purified and used for irrigation every year, which amounts to 530 million cubic meters. Approximately 80 percent of wastewater recovered in Israel is recycled. By treating wastewater appropriately, agriculture, tourism, gardening, and industry can benefit. The presence of raw sewage in settlements with no sewage collection or transportation networks continues to pose a great threat even today. There is a significant energy consumption associated with wastewater treatment processes. In this study, solar energy was attempted to be integrated as a renewable energy source. With Renewable Energy Sources integrated into the process, costs will be reduced, and it will also be possible to establish decentralized facilities in areas without proper infrastructure for traditional treatment methods.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86494791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Protection of MVDC grids for the production of green hydrogen 保护MVDC电网生产绿色氢

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.260

D. M. Larruskain, P. Eguía, A. Iturregi, E. Torres, V. Valverde, A. Blázquez

引用次数: 0