Mostrando ítems 1-5 de 5

Daily performance of a solar hybrid regenerative gas turbine in Colombia

Moreno Gamboa, Faustino; Vera Duarte, Luis Emilio; Guerrero Gómez, G (Reino Unido, 2021-06-11)

This work presents the evolution of the operation of a regenerative hybrid solar gas turbine in an average day of the year. The system is evaluated by means of a thermodynamic model that includes a solar concentrated ...
Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters

Prada Botia, Gaudy Carolina; Rojas Suárez, J P; Orjuela Abril, M S (Reino Unido, 2021)

This paper presents the implementation and design features of a gravimetric-based fuel consumption system. The proposed system comprises a gravimetric balance with serial output, a fuel pump, and a control valve that are ...
Digital portfolio: A tool for learning physics

Espinel Rubio, Gladys Adriana; C A, Hernández Suarez; L S, Paz Montes (Reino Unido, 2021-11-01)

The digital portfolio is a student-student, student-teacher interaction tool where formative assessment plays an important role in the learning of physics, with which the progress of students is monitored, the entire ...
Formation of critical thinking related to the energetic efficiency of applied physics processes of civil engineering works

Journal of Physics: Conference Series (Reino Unido, 2021-06-11)

Current problems associated to contamination and climate change claim for urgent solutions to make real a sustainable development of modern societies. To answer that call, the efficiency of applied physics processes must ...
Gains in active learning of physics: a measurement applying the test of understanding graphs of kinematics

Hernández, C A; Prada Núñez, R; Gamboa, A A (Reino Unido, 2021-06-11)

To teach the subject of physics in the classroom it is required that the teacher has and plans to carry a didactic strategy with him. Within this context is the methodology called Active physics learning, which is a ...

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Daily performance of a solar hybrid regenerative gas turbine in Colombia
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Moreno Gamboa, Faustino | 2021-06-11

This work presents the evolution of the operation of a regenerative hybrid solar gas turbine in an average day of the year. The system is evaluated by means of a thermodynamic model that includes a solar concentrated heliostat field solar concentrator with central receiver, a combustion chamber, and the thermal engine. The model is applied in Barranquilla, Colombia using local temperature and the solar radiation estimated with a theoretical model. Power output, the global efficiency and thermal engine efficiency are estimated. Additionally, to estimate the temperatures in different states of the cycle with and without regenerator. Finally, the impact of the regenerator is evaluated, which can increase the temperature of the solar receiver by up to 13.6%, and the inlet temperature to the combustion chamber increases by 17.3% at noon, when solar radiation is maximum.

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Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters
...
Prada Botia, Gaudy Carolina | 2021

This paper presents the implementation and design features of a gravimetric-based fuel consumption system. The proposed system comprises a gravimetric balance with serial output, a fuel pump, and a control valve that are integrated into a complete engine test bench via Arduino UNO®. The study implements an instrumentation methodology to minimize measurement disturbance and error propagation, which represents a major concern in engine experimental testing. Moreover, an interactive virtual environment is developed to reinforce user interaction via LabView™. Results demonstrated that the proposed measurement system features robust and reliable operation while maintaining negligible disturbance and overall uncertainty ranging from 0.010-0.23 g/s. Additionally, it was evidenced that the measurement system allows the analysis of key parameters to evaluate engine performance. The study of the fuels blends shows that the ethanol content causes a 6.8% increase in brake specific fuel consumption and a 4% decrease in the brake thermal efficiency. Due to the low cost of the developed measurement system can be easily adapted to test bench laboratories to promote a better learning process and in industrial sectors for better energy management.

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Digital portfolio: A tool for learning physics
...
Espinel Rubio, Gladys Adriana | 2021-11-01

The digital portfolio is a student-student, student-teacher interaction tool where formative assessment plays an important role in the learning of physics, with which the progress of students is monitored, the entire training process is evaluated and supported of the student, according to the planning and contents of the physics course. Therefore, this article describes the use of the digital portfolio as a tool for learning in students of a teacher training program in natural sciences and environmental education at a public university in Colombia. It is a quantitative study with a non-experimental design. The research subjects were students taking the subject of basic physics. The results indicate that students perceive the portfolio as a tool that allows monitoring and reflection of their learning and favor the integration of what they have learned, which supports the use of this tool, in accordance with the results of evaluation of the students' formative process. However, the use of the portfolio requires a continuous process of change and innovation, monitoring and permanent feedback between the teacher and the students.

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Formation of critical thinking related to the energetic efficiency of applied physics processes of civil engineering works
...
| 2021-06-11

Current problems associated to contamination and climate change claim for urgent solutions to make real a sustainable development of modern societies. To answer that call, the efficiency of applied physics processes must be continuously evaluated. Particularly, engineering programs are called to strengthen the training offer related to basic and applied physics sciences considering energetic transformation and transferring processes. In the civil engineering field, design, construction, functioning, and final disposition of buildings can be understood as applied physics processes. This work proposes an approach for defining and studying possible variables related to energetic processes and their mutual relationship. Such variables must be able to describe the processes of energetic changes which can occur during construction of civil works. To do so, qualitative analysis of mathematic expressions is done to promote the formation of abstract mental connections made of sensitivity and logical thinking. The methodology is based on four moments: (a) students´ brainstorming related to a particular issue, (b) identification of main topics related to energy transformation, (c) variable operationalization, (d) proposal of mathematical expressions. This proposal is expected to facilitate the construction of concepts related to sustainable development and help students to trust themselves when taking well thought out risks.

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Gains in active learning of physics: a measurement applying the test of understanding graphs of kinematics
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Hernández, C A | 2021-06-11

To teach the subject of physics in the classroom it is required that the teacher has and plans to carry a didactic strategy with him. Within this context is the methodology called Active physics learning, which is a strategy within the classroom and in the laboratory, as it allows the student to learn physics without depending on a textbook or the teacher who guides the course. The test of understanding graphs of kinematics assesses students' comprehension of kinematics. We report the application of an active learning experience for the conceptual learning of kinematics of students taking the subject of physics in an elementary and middle school. The study is quasi-experimental with a single group of 29 students using a pretest-interventionposttest design. With the results of the pretest and posttest the Hake learning gain index was estimated and showed evidence of the implementation of active learning in the conceptual evolution of students in kinematic concepts and their representation by means of graphs. This becomes a precedent for the improvement of pedagogical practice in favor of quality education.

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Daily performance of a solar hybrid regenerative gas turbine in Colombia

Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters

Digital portfolio: A tool for learning physics

Formation of critical thinking related to the energetic efficiency of applied physics processes of civil engineering works

Gains in active learning of physics: a measurement applying the test of understanding graphs of kinematics

Envíos recientes

Daily performance of a solar hybrid regenerative gas turbine in Colombia

Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters

Digital portfolio: A tool for learning physics

Formation of critical thinking related to the energetic efficiency of applied physics processes of civil engineering works

Gains in active learning of physics: a measurement applying the test of understanding graphs of kinematics

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Daily performance of a solar hybrid regenerative gas turbine in Colombia ﻿

Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters ﻿

Digital portfolio: A tool for learning physics ﻿

Formation of critical thinking related to the energetic efficiency of applied physics processes of civil engineering works ﻿

Gains in active learning of physics: a measurement applying the test of understanding graphs of kinematics ﻿

Envíos recientes

Daily performance of a solar hybrid regenerative gas turbine in Colombia

Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters

Digital portfolio: A tool for learning physics

Formation of critical thinking related to the energetic efficiency of applied physics processes of civil engineering works

Gains in active learning of physics: a measurement applying the test of understanding graphs of kinematics

Portales Institucionales

Daily performance of a solar hybrid regenerative gas turbine in Colombia

Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters

Digital portfolio: A tool for learning physics

Formation of critical thinking related to the energetic efficiency of applied physics processes of civil engineering works

Gains in active learning of physics: a measurement applying the test of understanding graphs of kinematics