Person:
Espinoza Abad, Juan Leonardo

Birth Date

1967-07-31

ORCID

0000-0002-7450-2084

Scopus Author ID

56970750100

Afiliación

Universidad de Cuenca, Cuenca, Ecuador
Universidad de Cuenca, Facultad de Ingeniería, Cuenca, Ecuador
Universidad de Cuenca, Departamento de Ingeniería Eléctrica, Electrónica y Telecomunicaciones(DEET), Cuenca, Ecuador

País

Ecuador

Organizational Units

Organizational Unit

Facultad de Ingeniería

La Facultad de Ingeniería, a inicios de los años 60, mediante resolución del Honorable Consejo Universitario, se formalizó la Facultad de Ingeniería de la Universidad de Cuenca, conformada por las escuelas de Ingeniería Civil y Topografía. Esta nueva estructura permitió una mayor especialización y fortalecimiento en áreas clave para el desarrollo regional. Cuenta con programas académicos reconocidos internacionalmente, que promueven y lideran actividades de investigación. Aplica un modelo educativo centrado en el estudiante y con procesos de mejora continua. Establece como prioridad una educación integra, la formación humanística es parte del programa de estudios que complementa a la sólida preparación científico-técnica. Las actividades culturales pertenecen a un programa permanente y activo al interior de nuestras dependencias, a la par de proyectos que desde el alumnado y bajo la supervisión de docentes cumplen con servicios de apoyo a nivel local y regional; promoviendo así una vinculación estrecha con la comunidad.

Job Title

Profesor (T)
Vicerrector Académico de la Universidad de Cuenca (2021- )

Last Name

Espinoza Abad

First Name

Juan Leonardo

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Search Results

Now showing 1 - 10 of 34

Micro grid laboratory as a tool for research on non-conventional energy sources in Ecuador
(IEEE, 2018) Espinoza Abad, Juan Leonardo; Sempertegui Álvarez, Rodrigo Efraín; Gonzalez Morales, Luis Gerardo; Gonzalez Morales, Luis Gerardo
This article presents to the scientific community technical and management issues taken into account for the implementation of the Micro Grid Laboratory, which will be part of “Balzay” Scientific, Technological and Research Center of the University of Cuenca. The paper describes the components that integrate the generation, storage and consumption of electrical energy from a combination of renewable and non-renewable sources that allow the emulation of a distributed generation network with the possibility of establishing technical criteria to recreate an intelligent network (Smart grid). The generation, storage and consumption components of the laboratory can interact through a control, monitoring and data acquisition system (SCADA) that allows automation of energy management for teaching and research purposes, as well as the possibility of interconnection with the local grid.
Charge management of electric vehicles from undesired dynamics in solar photovoltaic generation
(2022) Zorita Lamadrid, Ángel Luis; Davila Sacoto, Miguel Alberto; Gonzalez Morales, Luis Gerardo; Aguirre Pardo, Ivania Carolina; Duque Pérez, Óscar; Hernández Callejo, Luis; Espinoza Abad, Juan Leonardo
Power generation from photovoltaic solar systems contributes to mitigate the problem of climate change. However, the intermittency of solar radiation affects power quality and causes instability in power grids connected to these systems. This paper evaluates the dynamic behavior of solar radiation in an Andean city, which presents rapid power variations that can reach an average of 7.20 kW/min and a variability coefficient of 32.09%. The study applies the ramp-rate control technique to reduce power fluctuations at the point of common coupling (PCC), with the incorporation of an energy storage system. Electric vehicle batteries were used as the storage system due to their high storage capacity and contribution to power system flexibility. The application of the control strategy shows that, with a minimum of five electric vehicle charging stations at the PCC, the rate of change of the photovoltaic can be reduced by 14%.
Electricity sector in Ecuador: an overview of the 2007–2017 decade
(2018) Ponce Jara, Marcos A.; Castro, M m; Peláez Samaniego, Manuel Raúl; Espinoza Abad, Juan Leonardo; Ruiz, Elena
The Ecuadorian electricity sector has undergone several changes during the past decade. The objective of this paper is twofold: a) to show how the Ecuadorian electricity sector has evolved from 2007 to 2017, and b) to discuss the relationship between energy policies and their impacts on electricity supply, management, tariffs, and the country's economy. Although oil remains as the main energy source and the leading driver for economic revenue, several hydropower projects have been built or are under construction intending in part to reduce the country's dependence on oil. The installed hydropower capacity in the country in 2017 is approximately 81% higher than in 2007 and it is expected that, by 2018, approximately 93% of the electricity will be produced from hydropower. Currently, biomass and biogas contribute with 1.8% of the total electricity generation, but only 0.6% of the electricity is produced in wind and solar farms. Adoption of smart grid technologies is key to transform the Ecuadorian electricity network and to positively impact the quality of the electricity supply. The future of the Ecuadorian electricity sector relies on the successful implementation of the new Organic Law of Public Service of Electricity and on external financing for new energy projects.
Energy efficiency of an electric vehicle in a Latin American intermediate city
(Institute of Electrical and Electronics Engineers Inc., 2018) Gonzalez Morales, Luis Gerardo; Espinoza Abad, Juan Leonardo; Gonzalez Morales, Luis Gerardo
This study analyzes the behavior of the energy efficiency of an Electric Vehicle (EV) in Cuenca (Ecuador), a Latin American intermediate city, considering factors such as orography of the route as well as traffic conditions that include three field routes with urban, mixed, and high-speed characteristics. Three laboratory-driving cycle tests were carried out Federal Test Procedure (FTP-75), National Emission Ceiling Directive (NEDC) and Worldwide harmonized Light vehicles Test Procedures (WLTP). In the six environments, the performance was analyzed from mechanical and electrical variables obtained through a communication system under the On-Board Diagnostics II (OBD2) standard that incorporates the vehicle. The data of each sample contains 154 variables of interest, which are then analyzed by correlation to obtain those that affect the energy performance of the EV. With this information, the efficiency in the …
Energía solar en el Ecuador
(Universidad de Cuenca, 2015) Espinoza Abad, Juan Leonardo
Degradation analysis of 5-year field exposed photovoltaic modules using low-cost thermography, electroluminescence and I-V curve tests in Ecuador
(Institute of Electrical and Electronics Engineers Inc., 2020) Espinoza Abad, Juan Leonardo; Dávila Sacoto, M.A.; Hernández Callejo, Luis; Gonzalez Morales, Luis Gerardo; Espinoza Abad, Juan Leonardo
Detection of degradation of photovoltaic (PV) modules is important for the maintenance and operation of solar PV farms to reduce production losses. Infrarred (IR) Thermography, Electroluminescence (EL) and I-V curve tracers are detection techniques that generally use high-cost equipment, which limits their use in developing countries due to the tight budgets they manage for research and development. This study shows the use of low-cost alternatives to determine the deterioration of 140 solar PV modules at the University of Cuenca-Ecuador. This array has functioned continually without fail for 5 years. Measurement equipment for degradation detection techniques with a cost of less than 1, 000.00USD is used and its application is validated with professional equipment. A power loss of 1.29% per year is obtained. In addition, the use of degradation values obtained from similar studies is proposed to reduce the effort of detecting deterioration modes, whose approximation allows the calculation of the power delivered by the installation with a 2.04% error. A method for the economic quantification due to the losses caused by the deterioration of solar PV modules is also exposed.
Preliminary estimation of electrolytic hydrogen production potential from renewable energies in Ecuador
(2016) Posso Rivera, Fausto René; Sanchéz Quezada, Johanna Patricia; Espinoza Abad, Juan Leonardo; Siguencia Ávila, Jorge Marcelo
Abstract An initial assessment of the production potential of H 2 by electrolysis is performed in Ecuador with electricity from renewable sources. The renewable energies considered are: solar photovoltaic, wind, geothermal and hydropower. The information about their potential is based on maps of solar and wind resources, geothermal surveys, as well as estimates on mini-hydro and spilled turbinable energy from hydroelectric plants with reservoir. The amount of H 2 is obtained by considering a PEM electrolizer, with an efficiency of 75%, reaching a production of 4.55 × 10 8 kg/year in a likely scenario. Two different uses of H 2 are presented: 1) automotive transportation, replacing gasoline and diesel and, 2) rural energy, replacing firewood for cooking in rural households in the country. As a result, H 2 is able to replace 65% and 44% of the volumes of imported gasoline and diesel, respectively and the overall replacement of gasoline in 9 out of 23 provinces. Also, it is possible the total replacement of firewood in rural households in 20 provinces, and, under certain conditions, the H 2 surplus could be used to completely cover the electricity needs in the same rural households in 20 provinces. It is concluded that, there are certain opportunities in Ecuador to include H 2 in its energy matrix, contributing to improve the supply of secondary energy, raising the life quality in rural areas, mitigation of environmental pollution and strengthening the national economy. All this makes necessary to conduct more detailed technical and economic studies.
Impacts on the consumption of electric power by the use of efficient refrigerators - Ecuador case
(2017) Jara Cobos, Nelson Gustavo; Reinoso Avecillas, Fran Zhovani; Isaza Roldán, César; Espinoza Abad, Juan Leonardo
This article presents an analysis of the impacts that the Renova Refrigerator program will have, on electricity consumption in Ecuador; the main objective of this program is to replace refrigerators that are more than 10 years old with efficient class “A” domestic refrigerators. The development and implementation of the program reduces energy consumption by 8%, motivates people to use electric energy efficiently and encourages the national industry to use new technologies, which increases productivity and domestic product consumption. Additionally, in compliance with the current Ecuadorian and international regulations, the variation in electricity consumption of a domestic refrigerator is evaluated when it runs at the different temperatures determined by the thermal floors, which are very distinct in the Coast, Sierra and eastern regions of Ecuador.
AC transmission network expansion planning considering losses
(Institute of Electrical and Electronics Engineers Inc., 2018) Morquecho Salto, Edgar Gonzalo; Torres Contreras, Santiago Patricio; Espinoza Abad, Juan Leonardo; Lopez Quizhpi, Julio César; Quizhpe Huiracocha, Klever Leonardo; Sempertegui Álvarez, Rodrigo Efraín; Solano Quinde, Lizandro Damián; Espinoza Abad, Juan Leonardo
This paper proposes to solve the transmission network expansion planning problem (TNEP) using the AC model formulated with full non-linear load flow equations, incorporating the cost of losses in the transmission network. Additionally, the decomposed formulation finds the location and amount of the reactive compensation needed in the system. A comparison between Evolutionary Programming (EP) and a variation of EP with a Cultural Algorithm (CEP) is presented to solve this very complex optimization problem. The results are obtained using Garver's 6-bus test system and IEEE 24-bus test system. Index Terms-AC model, Cultural Algorithm, Evolutionary Programming, Optimization, Transmission network expansion planning.
Potential and impacts of cogeneration in tropical climate countries: Ecuador as a case study
(2020) Peláez Samaniego, Manuel Raúl; Espinoza Abad, Juan Leonardo; Jara Alvear, José Estuardo; Arias Reyes, Pablo Danilo; Maldonado Arias, Fernando Guillermo; Recalde Galindo, Patricia Elizabeth; Rosero Rivera, Pablo Vinicio; García Pérez, Tsai
High dependency on fossil fuels, low energy e ciency, poor diversification of energy sources, and a low rate of access to electricity are challenges that need to be solved in many developing countries to make their energy systems more sustainable. Cogeneration has been identified as a key strategy for increasing energy generation capacity, reducing greenhouse gas (GHG) emissions, and improving energy e ciency in industry, one of the most energy-demanding sectors worldwide.However, more studies are necessary to define approaches for implementing cogeneration, particularly in countries with tropical climates (such as Ecuador). In Ecuador, the National Plan of Energy E ciency includes cogeneration as one of the four routes for making energy use more sustainable in the industrial sector. The objective of this paper is two-fold: (1) to identify the potential of cogeneration in the Ecuadorian industry, and (2) to show the positive impacts of cogeneration on power generation capacity, GHG emissions reduction, energy e ciency, and the economy of the country. The study uses methodologies from works in specific types of industrial processes and puts them together to evaluate the potential and analyze the impacts of cogeneration at national level. The potential of cogeneration in Ecuador is ~600 MWel, which is 12% of Ecuador’s electricity generation capacity. This potential could save ~18.6 106 L/month of oil-derived fuels, avoiding up to 576,800 tCO2/year, and creating around 2600 direct jobs. Cogeneration could increase energy e ciency in the Ecuadorian industry by up to 40%.