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Item type:Publication, Experimental determination of the gas flame velocity of Camisea-Peru(Centro de Información Tecnológica, 2020-01-01)El objetivo del presente trabajo de investigacin ha sido determinar la velocidad de llama del gas natural de Camisea-Per en un rango amplio de razn de equivalencia mediante un estudio experimental. Se ha implementado los clculos matemticos utilizando el mtodo de la teora trmica mediante MathCad y simulando en un mecanismo cintico actual utilizando el programa CHEMKIN. Se ha conseguido experimentalmente valores de velocidad de llama entre 5% al 10% mayor al metano 100% puro comparado con otros autores en un amplio rango de razn de equivalencia. Esto valida los resultados debido a que el gas ensayado es gas natural con 88.54% de metano y 10.32% de etano, mejorando de esta manera el banco de ensayo experimental del laboratorio de combustin y control de emisiones gaseosas. En conclusin, la metodologa empleada proporciona una adecuada base de datos de velocidad de llama para el gas natural de Camisea-Per. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Design and experimental analysis of an improved burner with natural gas(Springer Science and Business Media B.V., 2021-06-01)This research aimed to improve the thermal performance of industrial cookstoves using natural gas in Metropolitan Lima to promote good use of energy and reduce the impacts of climate change. The methodology was to use an appropriate test bench under the international standards of fuel gases; the appropriate instrumentation was used to record the variables such as temperature, pressure, mass flow, and relative air humidity. The burner was installed in the prototype cookstove and test bench to perform the experimental part. After that, the powers and performances of several industrial cookstoves in the Peruvian market were determined for comparison with the design of the prototype cookstove following the experimental methodology of 02 international standards, one Latin American and one Asian. The burner designed and manufactured in previous research gave a wide range of natural gas power according to the working pressure used and high efficiency of approximately 57% compared to the cookstoves that are sold nationwide, which on average is 53%. The advantage of this prototype cookstove is that it uses operating pressures between 23 and 34 mbar compared to stoves in the Peruvian market that do not have a standard of the maximum gas pressure. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Simulación computacional e influencia de las variables meteorológicas en las concentraciones de PM10 y PM2.5 en Lima Metropolitana(Centro de Información Tecnológica, 2022-06-01)El objetivo de este trabajo fue simular numricamente la concentracin de los contaminantes atmosfricos PM10 y PM2.5 y su relacin con las condiciones meteorolgicas en Lima Metropolitana (Per). Se utiliz el programa cientfico de cdigo abierto CCATT-BRAMS (INPE/CPTEC Brasil). Los datos observados de las variables meteorolgicas y las concentraciones de PM10, PM2.5 se obtuvieron del Servicio Nacional de Meteorologa e Hidrologa del Per (SENAMHI). Las concentraciones simuladas de PM10 y PM2.5 fueron obtenidas mediante el programa numrico de transporte qumico CCATT y las variables meteorolgicas obtenidos por el modelo numrico de la atmsfera BRAMS. Se validaron los resultados con los datos observados. Los resultados muestran que existe influencia del incremento de la velocidad del viento y de la humedad relativa sobre la disminucin del PM10 tanto en verano como en invierno. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, SnO2-TiO2 and SnO2-MoO3 based composite gas sensors to develop an e-nose for Peruvian Pisco varieties differentiation(IOP Publishing Ltd, 2022-01-01)There is great interest in the development of a simple system that could identify adulteration or counterfeiting of Peruvian Pisco (a grape-based alcoholic drink). In this study, sensors based on SnO2-TiO2 and SnO2-MoO3 composites with different weight composition ratios were synthesized and characterized. These sensors were tested with aqueous solutions of EtOH/MeOH and Pisco samples of Italia and Quebranta varieties in order to explore their capacity to identify variations in these beverages. The response profile of the most sensitive sensors showed an enhanced response to alcoholic samples with greater content of ethanol up to a concentration of 45%v/v, while the increased content of methanol in the range of 0.1 to 0.3% v/v diminished the intensity of the sensor response. Differences in the composition of methanol and ethanol in the Pisco varieties studied (Italia and Quebranta) were correlated to the capacity of the composite-based sensors to differentiate them with greater performance. Sensors based on SnO2-TiO2-1/2 composites showed greater reproducibility in their response profile over time in comparison to SnO2-TiO2-1/1 and SnO2-MoO3 composites. The PCA showed that composite sensors were able to differentiate Pisco samples according to the varieties, Italia and Quebranta. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, MATLAB application for determination of 12 combustion products, adiabatic temperature and laminar burning velocity: Development, coding and explanation(Multidisciplinary Digital Publishing Institute (MDPI), 2024-09-01)The determination of the characteristics and main combustion properties of fuels is necessary for post-implementation in different applications. Among the most important combustion properties of a fuel are the combustion products, flame temperature and laminar burning velocity. Therefore, this paper describes the step-by-step development and coding of a MATLAB application that can determine 12 combustion products, flame temperature and laminar burning velocity in order to understand the logic of calculus procedure, so any user would be able to make improvements of new functionalities (add more fuels, add more combustion products, etc.). The numerical procedure and methods (Gaussian elimination, Taylor Series and Newton–Raphson) parallel with their implementation as code lines for the development of the application are carried out using flow charts. In addition, simulations in Ansys Chemkin were performed and included in the application as part of the results comparison. It was found that: (1) The MATLAB Application codification and development were successfully explained in detail, (2) the functions and execution sequence are described by using flow charts and code extract, (3) the application is available to everyone for modifications, (4) the application can only be used for hydrocarbons fuels, (5) the application execution time registered was less than 8 s. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Experimental determination of a mixture composed of Camisea natural gas and CO2 laminar burning velocity(Multidisciplinary Digital Publishing Institute (MDPI), 2024-11-01)The aim of this work is to provide new experimental data on laminar burning velocities for a new synthetic mixture composed of Camisea natural gas and CO2. It was found that the relevant published experimental background data are limited to mixtures composed of methane and CO2; considering the fact that Camisea natural gas is widely used in Peru, this experimental research will serve as a supportive resource for further experimental and industrial implementations in this country, such as the design and modeling of new engines or industrial burners that are designed to be fueled by this mixture. An experimental setup for analyzing three types of flame geometry, which is feasible to implement for a wide range of conditions, was built in PUCP PI0735 laboratory and all the measurements were obtained for a range of mixtures (0%, 21.2%, 28.5%, 38.9%, 50% CO2) and ratios from around 0.55 to 0.95 at atmospheric conditions. The laminar burning velocities results obtained were analyzed in groups based on %CO2. In addition, the experimental margin error was determined by considering all the sources. The following conclusions were reached: (1) The laminar burning velocity decreases with the increase in CO2 percentage in the mixture due to the CO2 decreasing the flame temperature effect. (2) The flat flame type provided the highest value of burning velocity for each group of CO2 percentage in which it appears. (3) The highest obtained laminar burning velocity value was 22.64 ± 0.15 cm/s, for a flat flame with a ratio of 0.72 and 29.98% of CO2, while the lowest obtained value was 6.78 ± 0.15 cm/s for a conical trunk flame with a ratio of 0.59 and 49.83% of CO2. (4) The highest evaluated CO2 percentage was 50.97% for a conical trunk flame with a ratio of 0.69 and a burning velocity value of 11.04. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, MATLAB application for determination of 12 combustion products, flame temperature and laminar burning velocity(2024-07-01)The aim of the present work is to contribute to the scientifical community by presenting a simple software tool, MATLAB Application for determining 12 combustion products, flame temperature and laminar burning velocity. The application was developed in the MATLAB App designer for 6 pre-set fuels and 12 combustion products. It is code consist in numerical methods, a variety of conditions and loops evaluation. To summarize, the app will serve as a reference or data source for further experimental or other complex combustion simulation work related because it demonstrates to had similar results compared to some previous studies. Moreover, it has the possibility to use a variety of features and to implement new versions or upgrades for personal purpose needs. Key words. Burning velocity, combustion products, flame temperature, numerical methods, MATLAB programming. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Image processing to calculate flame velocity based on deep learning(Energies and Quality Journal, 2024-07-01)Flame velocity is one of the main characteristics of combustion. One of the methods to measure flame velocity is to determine the flame area by approximating the shape of the flame to a flat, conical, or truncated cone surface. To increase the precision in the calculation of the flame area and thus improve the calculation of the flame velocity, the use of semantic segmentation of the image is proposed to determine the flame image contour and then obtain the flame area with an integral calculation. Semantic segmentation was performed using the U-net structure. The results were compared with other classical image processing techniques showing the advantages and disadvantages. The results show that semantic segmentation based on Deep Learning segments the flame image with high precision even under changing conditions such as flame color variations and background imperfections. Key words. Laminar flames, burning velocity, image processing, deep learning. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Determination of 12 Combustion Products, Flame Temperature and Laminar Burning Velocity of Saudi LPG Using Numerical Methods Coded in a MATLAB Application(MDPI, 2023-06-01)The characterization of a specific fuel has always been an important point for developing and designing new components or systems with the maximum efficient possible. Studying the laminar burning velocity can lay a necessary prerequisite for the accurate poststudy of the turbulent range and to understand how the combustion process takes place. The study of the combustion products from a specific reaction is a requisite for any system in order to understand the elements that are taken in the process and if it is possible to improve it. In this study, a new open code methodology was developed for the determination of combustion products, flame temperature and laminar burning velocity using numerical methods (Newton–Raphson, Taylor series and Gaussian elimination) in an application codified in MATLAB. The MATLAB application was applied for the study of Saudi LPG setting parameters such as initial temperature, pressure and equivalence ratio that are meaningful because they have a great effect on the results. In addition, simulation in Ansys Chemkin using San Diego and RedSD mechanisms was carried out. The results from the MATLAB application were compared with other experimental research and Ansys Chemkin simulation. These are presented in different plots and it is shown that: (1) For the laminar burning velocity results, the numerical method agrees with the experimental results for ratios (0.6–1.2) by other authors and the simulation in Ansys Chemkin. (2) For the highest studied equivalence ratios (1.3–1.7) the laminar burning velocity results between all the resources have more difference. (3) The combustion products calculated by the MATLAB application agree with those simulated in Ansys Chemkin except N and NO. (4) The MATLAB application gives a maximum value of 40.35 cm/s, that is greater than 35 ± 0.91, the one determined by Bader A. Alfarraj. (5) The flame temperature calculated by the MATLAB application overestimates that simulated in Ansys Chemkin but has the same behavior for all the calculated ratios. (6) The MATLAB application has also been developed for the study and analysis of other fuels. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Design of a Solar Mango Dryer for Rural Sectors Located in Piura, Peru(European Association for the Development of Renewable Energy, Environment and Power Quality (EA4EPQ), 2023-07-01)In the present study, the energy design of an indirect solar dryer with the capacity to dehydrate 10 kg of mango was carried out. The methodology used was based on calculations of heat transfer, thermodynamics and dimensioning of the main components which are the solar collector and the drying chamber. As results, it was analyzed that the ambient air must enter the collector with a minimum speed of 1.175 m/s; the air increases its temperature to approximately 45 °C when passing through the collector thanks to the energy in the form of heat that is supplied, this energy being 1.363 kW, the drying process time was established in 8 hours and the environmental conditions in the Piura region were considered. Additionally, simulations were carried out that allow to know the behavior of the drying air inside the drying chamber, allowing to analyze and discuss the reason for the results that are observed graphically and numerically. It is concluded that the indirect solar dryer is a friendly option with the environment since renewable energy such as solar energy is used, thus replacing traditional dryers that generate polluting gases or use electrical sources.