International journal of physical sciences and engineering
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Development and optimization of the ratio vegetation index on the visible and infrared spectrum
Get PDFThis study aims to find a suitable vegetation index model to analyze the distribution of clove vegetation in Buleleng regency, Bali. Vegetation index model Ratio Vegetation Index (RVI) extracted from Landsat 8 was developed in the visible spectrum (l = 0.450 - 0.680 ?m) and infrared (l = 0.845 - 2.300 ?m). Development methods are carried out on the basis of the spectral reflectance response characteristics of the dominant electromagnetic waves from the visible and infrared spectra of vegetation. Created a multiple regression relationship results from scattergram that links RVI vegetation index with band 3 = B3, band 5 = B5, band 6 = B6, and band 7 = B7. Optimization strategy is carried out by dividing the development of RVI with a variable number factor. There are 4 forms of RVI vegetation index models from the development and optimization of the visible and infrared spectra. Of the 4 new vegetation index forms, which provide optimal results and close to extensive data from the Forestry and Plantation Service, Buleleng regency, Bali is RVInew4 = 0.0022 + 0.00142 * B3 + 0.00028 * B5 + 0.00054 * B6 + 0.00096 * B7. The area produced by this vegetation index model in analyzing the distribution of clove vegetation is 7667.82 ha. Is this area 99.40% of the average data area? the Forestry and Plantation Service, Buleleng regency, Bali in 2014, which is 7622.32 ha. The dominant distribution of clove vegetation is in the rare category with an area of 7441.74 ha
Packaging sixto duran ballen and the dam la esperanza
Get PDFThe dam is a reservoir that stores about 450,000,000 cubic meters of water, has multiple purposes allowing flood control, produces irrigation water, for human consumption and shrimp farming in the area center of the province of Manabí. The first studies for the construction of the dam were carried out in the years 1970 to 1975 as a result of the hydrological/economic feasibility plan of the Province of Manabí, and of the integral hydro-agricultural area of the Carrizal Chone Basin. After several preliminary studies with different international firms and with changes of designs in 1992, the Dragados and Constructions SA Company was in charge of the construction of what is now the Manabí water project. It is located in the parish of Quiroga approximately 12 kilometers from the cantonal canton of Bolívar Canton, Calceta, with an extension of 2,500 hectares, with a construction area of 120 hectares and will allow irrigation of 17,000 hectares of the central area of Manabí. The objective of the work is to make an analysis of the construction of the La Esperanza dam. For this, the logical historical method was used, as well as the bibliography search to know the historical construction of the dam, as well as the observation method
Energy interpretation of solar radiation affects for Artemisa province
Get PDFSolar energy is one of the renewable sources with the best prospects for the future, which can have used directly in two fundamental ways: thermal energy and photovoltaic solar energy. Photovoltaic systems are a viable alternative to diversify the energy base worldwide, being able to inject electrical energy into the grid. The work shows the study of the energy interpretation of solar radiation that affects the province of Artemisa, for its possible use in the generation of electricity, based on the introduction of photovoltaic systems connected to the electricity grid. A theoretical analysis is made about the solar potential and the influence of the climatic variables in the use of it, the territory of the Artemisa province is characterized, where the solar radiation for the generation of electricity is valued, the energy impact is evaluated. Derives from the use of solar radiation that affects the territory to generate electrical energy
Design, construction, and energy of sustainable solar dryers in Jipijapa Canton
Get PDFSolar energy is one of the sources of renewable energy and more dispersed in the territory, this can be implemented for different energy uses for being a clean energy and that can be sustainable over time, the canton Jipijapa presents an annual radiation of 4.8 kWh/m2 day. In Cerro Grande community located in this area is located 529 meters above sea level, its inhabitants are engaged in agriculture, specifically the revival of the production of quality coffee for its taste and aroma. The drying treatment was not adequate, so their prices have dropped in the national and international market, with the aim of achieving a drying quality of this product and from knowing that the bamboo cane (Angustifolia Kunt) was a resource with good energy properties, two dryers were designed that take advantage of direct and indirect solar energy, to compare which was the most suitable for drying the coffee bean in a cleaner and simpler way. The results obtained in its design, construction and evolution determined that these types of drier can be implemented in communities that have the conditions of natural renewable resources and needs to improve the drying conditions of different agricultural products, thereby supporting the energetic and social sustainability of the populations that live in rural areas and that today are the base of the sustenance of agricultural products such as coffee, cocoa, and others
Challenges and technical requirements for integration of renewable energy sources in Cuban electric system
Get PDFThe decision of the Cuban Government to massively introduce Renewable Energy Sources (RES) as a way to change the energy matrix, and in particular, the electricity matrix, is presented as an opportunity to introduce not only sources of energy friendly with the environment, but also make the contributions that, without limiting the development of the country, respond to the UN Millennium Development Goals (UNMDG). However, the large-scale use of RESs in an electrical system such as Cuba, isolated and not interconnected to other systems, can have a group of challenges that must be taken into consideration when it is exploited, since it does not incorporate only new technologies, some of which depend on weather conditions such as solar, wind and hydro technology for the production of electricity, but allow us to think about the introduction of emerging technologies that can increase the penetration of RES in the electrical system and introduce new management concepts, both territorially and nationally. The present work reflects on this, from some experiences that have been analyzed in different research works carried out at CIPEL, plus other international experiences
Energy analysis for designing photovoltaic power plant in building of the faculty of mathematics
Get PDFIt presents an analysis linked to one of the sustainable energy alternatives that are currently being adopted with worldwide success. Putting the field research method into practice. The results of a study related to an application of technological innovation to reduce the amount of the electricity bill in the building of the Faculty of Mathematical, Physical, and Chemical Sciences (FCMFQ), by introducing photovoltaic technology connected to the network of the low tension of the institution. The results of the study of load and hourly consumption of energy of the entity are shown and an own methodology is deployed for the technological design of a photovoltaic power plant connected to the network, which can avoid the consumption of energy of the conventional network, reducing the amount of the electric bill of the faculty, managing to reduce losses, improve the quality of electric service and reduce CO2 emissions into the atmosphere
The effectiveness of the use of portfolio assessment by controlling prior knowledge to enhance scientific attitude among senior high school students
Get PDFThis study was aimed at investigating the effect of the portfolio in Physics teaching on scientific attitude by controlling prior knowledge. This study was conducted at public senior high schools in Singaraja by using the experimental method with single factor independent group design with the use of covariable. This study involved 152 Class X MIPA students of senior high schools as a sample selected by multistage random sampling technique. Portfolio assessment was made by integrating it with Physics teaching. The implementation of portfolio assessment involved 4 basic elements: the presence of the student’s work folder, clear assessment criteria, self-assessment, and teacher and student conference. The data that were needed in this study were students’ scientific attitude as the independent variable and prior knowledge as covariate variable
Photovoltaic energy to face an earthquake
Get PDFThe application of photovoltaic technology is necessary to reduce the harmful effects of an intense earthquake in the city of Portoviejo. It is based on the information obtained about the occurrence of the earthquake on April 16 and considering data from other events of the same nature occurred in the territory, an assessment of the seismic risk for the city and by characterization of one of the zones is made subject to danger, the introduction of photovoltaic luminaires is proposed in order to provide certain strengths that can facilitate the work of the first urgency in the rescue and urgent repair of breakdowns, as well as the evacuation of the population to safer areas especially at night. An analysis is made of the technological structure of photovoltaic luminaires and the prices they have in the market, both internally and internationally
The future of micro-grids in Ecuador
Get PDFAn analysis is made on the development of power lines worldwide and that offer the approaches of the impacts that are generated in the economic and environmental, which justify the application of smart grids in Ecuador, as an effective way to raise the efficiency of the electric power service and to achieve a more efficient use of the energy that is generated by showing the different technologies used in electricity generation where renewable energy sources are incorporated. A comparative analysis of how the installed generation power has been increasing until 2016 is shown
Sustainable development and environmentally friendly energy systems
Get PDFoai:ojs.pkp.sfu.ca:article/2People are relying upon oil for primary energy and this will continue for a few more decades. Other conventional sources may be more enduring but are not without serious disadvantages. The renewable energy resources are particularly suited for the provision of rural power supplies and a major advantage is that equipment such as flat plate solar driers, wind machines, etc., can be constructed using local resources. Without the advantage results from the feasibility of local maintenance and the general encouragement, such local manufacture gives to the buildup of a small-scale rural-based industry. This communication comprises a comprehensive review of energy sources, the environment, and sustainable development. It includes the renewable energy technologies, energy efficiency systems, energy conservation scenarios, energy savings in greenhouses environment and other mitigation measures necessary to reduce climate change. This study gives some examples of small-scale energy converters, nevertheless, it should be noted that small conventional, i.e., engines are currently the major source of power in rural areas and will continue to be so for a long time to come