Revista de Energías Renovables最新文献

Synthesis and characterization of Zinc Oxide thin films deposited by Spray Pyrolysis technique for possible applications in solar cells 喷雾热解法制备太阳能电池用氧化锌薄膜

Revista de Energías Renovables Pub Date : 2022-12-31 DOI: 10.35429/jre.2022.17.6.8.14

D. E. Vázquez-Valerdi, J. Luna-López, N. Abundiz-Cisneros, G. Juarez-Díaz

{"title":"Synthesis and characterization of Zinc Oxide thin films deposited by Spray Pyrolysis technique for possible applications in solar cells","authors":"D. E. Vázquez-Valerdi, J. Luna-López, N. Abundiz-Cisneros, G. Juarez-Díaz","doi":"10.35429/jre.2022.17.6.8.14","DOIUrl":"https://doi.org/10.35429/jre.2022.17.6.8.14","url":null,"abstract":"In the present study, the synthesis and characterization of ZnO thin films deposited at 300, 350 and 400°C using the Ultrasonic Spray Pyrolysis technique, as a possible candidate for electron transport layer (ETL) in solar cells is reported. X-ray diffraction (XRD) analysis revealed that the films have a hexagonal wurtzite phase with a preferential orientation (101) with good polycrystallinity. The mean crystallites size based on the Debye-Scherrer model was calculated, indicating that the size of the crystals decreases as the deposition temperature increases. The optical characterization of the material showed a high transmittance in the visible region (85-99%) with which the optical band gap (3.06-3.29 eV) was determined. The thickness, surface roughness and optical constants (n and k) were determined by Spectroscopic Ellipsometry using the Gaussian oscillator model. Hall Effect revealed a low resistivity of 1-4 Ω cm and a high mobility of charge carriers (304 cm2/Vs) in the films. Due to all these properties, ZnO is considered an ideal material for optoelectronic applications, as well as a material with potential to be used as ETL in solar cells.","PeriodicalId":329432,"journal":{"name":"Revista de Energías Renovables","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129187328","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

Mechanical characterization of spent- coffee-grounds briquettes 废咖啡渣型煤的力学特性

Revista de Energías Renovables Pub Date : 2022-12-31 DOI: 10.35429/jre.2022.17.6.15.23

Oscar Chamarraví-Guerra, Claudio Alberto Moreno-Arias

{"title":"Mechanical characterization of spent- coffee-grounds briquettes","authors":"Oscar Chamarraví-Guerra, Claudio Alberto Moreno-Arias","doi":"10.35429/jre.2022.17.6.15.23","DOIUrl":"https://doi.org/10.35429/jre.2022.17.6.15.23","url":null,"abstract":"This article provides an overview of the manufacture of briquettes by mixing spent coffee grounds (SCG) and recycled newsprint (RNP), with some established compositions. Hollow cylindrical briquettes were used as samples for mechanical characterization for the research project \"Characterization of type 2 biomass briquettes as solid fuel alternative to firewood and coal in kitchens, restaurants and small businesses, based on the Colombian Technical Standard 2060\" carried out at the University of America in Bogotá, Colombia. Initially, the process of design and construction of a Peterson type press for the manufacture of briquettes was carried out. A universal testing machine was used for the mechanical compression tests. The shatter resistance was evaluated by launching the samples in free-fall from a height of 1 m several times until they got broken. Finally, and the abrasion resistance was measured using a ball-mill adapted to the proposed briquette size. All these tests were carried out to identify which of the proposed briquettes compositions has suitable mechanical properties to keep the shape, size and density in the actual processes of transport, handling and storage.","PeriodicalId":329432,"journal":{"name":"Revista de Energías Renovables","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115047514","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

Measurement of degradation of solar panels induced by damp heat 湿热致太阳能板退化的测量

Revista de Energías Renovables Pub Date : 2022-12-31 DOI: 10.35429/jre.2022.16.7.24.28

Araceli Salazar-Peralta, José Alfredo Pichardo-Salazar, Ulises Pichardo-Salazar, R. Chávez

引用次数: 0

Solar drying study of mango (Mangifera indica) and determination of glucose content in dehydrated samples 芒果(Mangifera indica)的太阳干燥研究及脱水样品中葡萄糖含量的测定

Revista de Energías Renovables Pub Date : 2022-12-31 DOI: 10.35429/jre.2022.17.6.1.7

M. Castillo-Téllez, B. Castillo‐Téllez, Luz María Hernández-Cruz, G. A. Mejía-Pérez

引用次数: 0

Dimensioning of a hybrid system boiler - solar collector of evacuated tubes, for the defrosting of fish 鱼除霜用真空管锅炉-太阳能集热器混合系统的尺寸

Revista de Energías Renovables Pub Date : 2022-06-30 DOI: 10.35429/jre.2022.16.6.38.43

Juan Ovando-Sierra, Giovanni Camacho-Uc, Mauricio Huchin-Miss, Carlos Uc-Rios

引用次数: 0

Nuclear energy as backup to renewable energies 核能作为可再生能源的后备

Revista de Energías Renovables Pub Date : 2022-06-30 DOI: 10.35429/jre.2022.16.6.15.23

Guadalupe Jiménez-Roano, M. Cruz-Gómez, José Alfredo Mejía-Pérez, Tomás Aarón Juárez-Zerón

引用次数: 0

Livestock Biomass: Energy source for 26 municipalities in Hidalgo State experiencing high marginalization 牲畜生物质:伊达尔戈州26个高度边缘化城市的能源来源

Revista de Energías Renovables Pub Date : 2022-06-30 DOI: 10.35429/jre.2022.16.6.1.14

Angelina González-Rosas, B. Ortega-Marin, J. González-Islas, Gildardo Godínez-Garrido

{"title":"Livestock Biomass: Energy source for 26 municipalities in Hidalgo State experiencing high marginalization","authors":"Angelina González-Rosas, B. Ortega-Marin, J. González-Islas, Gildardo Godínez-Garrido","doi":"10.35429/jre.2022.16.6.1.14","DOIUrl":"https://doi.org/10.35429/jre.2022.16.6.1.14","url":null,"abstract":"The high consumption of natural non-renewable resources has caused an exponential increase in the greenhouse gases which provoke global warming and as a result, every country on the planet suffers environmental issues due to the excessive use of fossil fuels. There are several different sources of gas production, principally caused by human beings, however there is little to no interest in mitigating them. Global interest is instead currently focused on containing them via the reduction of carbon dioxide (CO2) and methane (CH4). In the Paris Agreement, participating countries have committed to keeping the rise of the mean global temperature below 2 °C and to limiting its increase to 1.5 °C. Latin America as a whole (and principally, Mexico) has committed to lowering greenhouse gases 25% by 2030 and 50% by 2050 (AZEL, 2018). To achieve this, it is necessary to contribute by applying clean energy alternatives. The current project proposes using bovine and swine organic wastes for the production of biogas and electric energy in 26 cities of high marginalization in Hidalgo, a state in Mexico which contributes to lowering environmental pollution, providing access to better services for raising the quality of life of its inhabitants, and minimizing the use of (therefore saving the money provided for) subsidies for conventional electric energy.","PeriodicalId":329432,"journal":{"name":"Revista de Energías Renovables","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117079374","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

Characterization of a parabolic solar cooker made from recycled materials 用回收材料制成的抛物面太阳能炊具的特性

Revista de Energías Renovables Pub Date : 2022-06-30 DOI: 10.35429/jre.2022.16.6.24.37

Ángel Marroquín-De Jesús, Mayola Galván-Mondragón, Luz Carmen Castillo-Martínez, J. M. Olivares-Ramírez

引用次数: 0

Ethanol as an alternative to water vapor for saving energy and fossil fuels in thermoelectric plants 乙醇作为水蒸汽的替代品，在热电厂节约能源和化石燃料

Revista de Energías Renovables Pub Date : 2021-12-31 DOI: 10.35429/jre.2021.15.5.1.5

José Juan Hernández-Medina, René Pérez-Martínez, Hilario López-Xelo

{"title":"Ethanol as an alternative to water vapor for saving energy and fossil fuels in thermoelectric plants","authors":"José Juan Hernández-Medina, René Pérez-Martínez, Hilario López-Xelo","doi":"10.35429/jre.2021.15.5.1.5","DOIUrl":"https://doi.org/10.35429/jre.2021.15.5.1.5","url":null,"abstract":"This article proposes the use of ethanol in a 96% azeotropic mixture as an alternative to water vapor in thermoelectric generators with notable advantages in saving fuel. As is known, water is a cheap resource, available everywhere in a liquid state. However, water has an unusually high heat of vaporization and an equally high boiling point, so converting water to steam requires consuming large amounts of fossil fuels to break the hydrogen bonds in this substance. In contrast, evaporating ethanol requires only 37 percent of the fuel needed to evaporate water. In addition, water, before turning into steam, needs to be softened and treated with chemicals to prevent oxidation and scale deposits in pipes. If quality ethanol is used, this process of adjusting the water would not be necessary, which represents another saving. On the other hand, it is possible to resort to the use of solar heaters to raise the temperature of the ethanol to around 70ºC to later heat it to 80ºC or more, if necessary, with fossil fuels, making more significant savings. Objectives: To propose the replacement of water vapor by ethanol vapor as a working fluid to move the turbines of thermoelectric plants to reduce the consumption of fossil fuels. Methodology: Analyze the physical properties of water and compare them with those of ethanol to know the advantages and disadvantages of one and the other as working fluids Contribution: Through small modifications in thermoelectric plants it is possible to reconvert them to operate with ethanol vapor and save on fossil fuels.","PeriodicalId":329432,"journal":{"name":"Revista de Energías Renovables","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123786270","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

Bioethanol production of second generation from corn cob 从玉米芯生产第二代生物乙醇

Revista de Energías Renovables Pub Date : 2021-12-31 DOI: 10.35429/jre.2021.15.5.29.33

F. Sandoval-Salas, Carlos Méndez-Carreto, Christell Barrales-Fernández, Graciela Ortega-Avila

引用次数: 1