Facultad de Arquitectura, Diseño y Artes
Thumbnail Image
Parent Organisation

2024 2024 2023 2023 2022 2022 2021 2021 2020 2020 2019 2019 2018 2018 0 0 5 5 10 10 15 15 20 20

Filters

Reset filters

Settings
Now showing 1 - 10 of 48
No Thumbnail Available
Publication

RF Energy Harvesting System Based on Spiral Logarithmic Dipole Rectenna Array

2023 , Cumbajín Alferez, Myriam , Sánchez, Patricio , Pillajo D. , Gordón C.

This paper presents the development, design, simulation and fabrication of a logarithmic spiral antenna array for the electromagnetic energy collection system independent of frequency, compact in microstrip technology, low cost and operating within a range of frequencies. 1 to 4 GHz, are designed using the CST Studio software that allows modeling and simulating essential parameters such as radiation lobes, VSWR, power, gain, parameter S11. From these simulations the printing is done on an RF4 substrate with a thickness of 1.6 mm, a dielectric constant of 4.4 and an input impedance of 50 Ω. The resonator structure antenna with dimensions of 190 × 210 mm. The frequencies obtained with the rectenna matrix, since it offers good performance for electromagnetic energy harvesting applications that operate in standard frequencies such as GSM, WiFi, LTE which are available in the environment and allows us to collect energy. To obtain electrical energy as part of the design of a frequency rectifier which is optimized with the application of the Schottky diode. In addition, its construction of the rectenna matrix was carried out based on the proposed design, then performance tests and validation of the prototype were carried out using the miniVNA Tiny spectrum verifier, and finally energy storage tests were carried out. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

View
No Thumbnail Available
Publication

Suitable electric generator for pico-hydro power plant in ambato–huachi–pelileo water irrigation channel

2020 , Cumbajín Alferez, Myriam , Sánchez, Patricio , Hidalgo, A. , Gordón, C.

We present the analysis of the selection of electric generator suitable for Pico-Hydro Power Plant in the Ambato-Huachi-Pelileo irrigation channel in Ecuador. For which a meticulous literary review has been carried out about the main characteristics of the Pico-Hydro Power Plant as it is the height, the hydric resource, the turbine and the generator. Considering the water resource, which in our case is provided by the Ambato-Huachi-Pelileo irrigation channel, the parameters of low height and slow speed have been taken around 1.6 m3/s, which has allowed us to analyze the generator suitable for the required Pico-Hydro Power Plant. Therefore, the study conducted has allowed us to conclude that the electric generator suitable for the Pico-Hydro Power Plant in the Ambato-Huachi-Pelileo irrigation channel is a radial flux permanent magnet generator that is capable of providing sufficient electrical power with a simple structure, low revolutions, and high efficiency. Also, a Matlab simulation was developed in order to predict the power which is capable of provide the radial flux permanent magnet generator which in this case is 3.8 KW. This work aims to provide several benefits to the society bordering the irrigation channel, such as generating energy for self-consumption as a contribution to the lighting of the channel at no cost to the public in order that it is not dangerous for the passers at night and providing the ability for maintenance works at any time. © Springer Nature Switzerland AG 2020.

View
No Thumbnail Available
Publication

Vernacular Passive Strategies for Sustainable Houses in the Andean Ecuadorian Context

2022 , Ormaza M.V. , Moya Vicuña, Susana , Monar E.

Sustainability and thermal comfort in developing countries could be hard to achieve due to the high cost of standardized construction methods, such as reinforced concrete and steel framed structures. As a result, most dwellings ignore the basic principles of livability and sustainability promoting a high demand of external construction resources and using elevated quantities of energy during its operative life. The purpose of this paper is to analyze passive and vernacular strategies for typical active thermal comfort as alternatives for low rise housing in the Andean region of Ecuador by using rammed earth walls as thermal mass elements. This research aims to reach the minimum comfort levels stablished by INER and ASHRAE 90.1 envelope requirements for climate zone 4C (temperate continental). © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

View
No Thumbnail Available
Publication

Health and Educational Impacts Reduction Using a Supervisory Control and Data Acquisition Web System

2018 , Davila L. , Robalino F. , Gordon C. , Cumbajín Alferez, Myriam

We present the design and implementation of a Supervisory Control and Data Acquisition SCADA web system of pollution factors such as Nitrogen Dioxide (NO2), Carbon Dioxide (CO2) and Carbon Monoxide (CO) in order to manage them, providing comfort in indoor environments. The SCADA web system allows a comparative analysis of the recorded information with the alert, alarm and emergency levels, established in the Ecuadorian air quality regulations, annex 4 of Book VI of the Unified Legislation of Secondary Legislation of the Ministry of the Environment., The SCADA web system performs the comparison of the registered information, with the physical agents of environmental comfort, established in the ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers) standards. In the process of stabilization of the pollution factors, in indoor environments, air ionizers are used, which emit negative ions to maintain the standardized range in micrograms per cubic meter (3). Finally, we have been able to develop a SCADA web system for controlling pollution factors in indoor environments thanks to the integration of firebase (Android Studio), authentication (Facebook), notification (Database and Web Server), control and monitoring (Android Studio) interfaces. Besides, the SCADA web system allows preventing long term health problems such as allergic reactions, physical exhaustion and respiratory diseases, which influence academic performance during study days in educational institutions. © 2018 IEEE.

View
No Thumbnail Available
Publication

Analysis of Adobe Block Manufacturing Techniques

2023 , Molina M.A.R. , Carvajal E. , Jara Garzón, Patricia , Sanz D. , Freire L.

Historically, adobe blocks have been one of the most widely used materials in Ecuador's vernacular architecture due to their low cost and properties. However, in the last decades, its use has decreased as well as the manufacturing expertise. This article focuses on analyzing the adobe manufacturing process in the province of Cotopaxi. We propose a three-stage methodology: 1) documentary bibliographic stage of adobe manufacture and regional regulations. 2) observation stage in local adobe factories identifying the processes and raw material; 3) analysis stage of adobe raw material and experimentation of the material. The documented information facilitates the understanding of adobe manufacturing processes, achieving a reference repository that contributes to sustainable development by using low impact construction materials that are easy to incorporate into architecture. © 2023 IEEE.

View
No Thumbnail Available
Publication

Socio-Spatial Segregation as a Consequence of Commercial Gentrification in the Centrality of Cumbayá, Quito-Ecuador

2023 , Padilla M.J.U. , Zumárraga Salgado, María Daniela , Riascos A.C.T. , Aguilar N.J.M. , Del Cisne Proaño Ruiz K.

The process of urban expansion of Quito has caused the formation of new peripheral centralities, the same ones that offer all the services that the traditional center grants, thanks to public and private investment. In this sense, citizens from wealthy social strata are attracted to reside in these new sectors where consumption, exclusivity and privatization of space become the new way of life that conditions the social dynamics of the territory. This article seeks to identify the types of urban segregation that have occurred from the phenomenon of commercial gentrification evidenced on the edges of the Central Park of Cumbayá between the years 2000 and 2022. For this, a mixed research methodology is used where interviews, photographic archives and surveys allow generating a socio-spatial analysis that evidences this phenomenon. As a result, it was found that commercial gentrification not only has displaced old residents of the sector but also created stigmatization and segregation. Finally, is evidenced that few traditional citizens have resistance to abandon their place of origin and have raised their voices against this urban phenomenon. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.

View
No Thumbnail Available
Publication

Smart Antenna Array for Optimal Electromagnetic Energy Capture

2023 , Cumbajín Alferez, Myriam , Sánchez, Patricio , Escobar E. , Gordón C.

Smart antennas are currently one of the most exploited fields in terms of wireless networks, allowing high data transmission capacities, this is achieved by focusing the radiation on the desired direction and adjusting to the environment and conditions in which communications are developed. Smart antennas employ a set of radiating and emitting and combining elements organized in the form of arrangements connected at a common point to guarantee the required power, the signals from these elements are combined to form a moving beam pattern that follows a pattern determined by the user or designer. The consumption of energy within communication systems is considered a big problem and a challenge when carrying out implementations in media where the storage or recharging of the end terminals is complicated by their location, this trend grows with the presence of the Internet of the IoT things, where it is directly dependent on the construction of a large wireless network that allows everything to be interconnected, for this reason there are investigations in the 2.4 and 5.8 GHz bands and represents future work for the 5th Generation (5G) cell phone. The great possibility of collecting electromagnetic energy from densely populated urban areas becomes a great renewable source of power for communication devices for both existing Wi-Fi technology and new technologies such as the 5G network. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

View
No Thumbnail Available
Publication

Hybrid Storage System Based on Rectenna and Photovoltaic Cells for Low Power IoT Wireless Devices

2023 , Cumbajín Alferez, Myriam , Valle M. , Gordón C. , Peñafiel C.

This article presents the results of a research project, in which a system for harvesting Radio Frequency energy in the Wi-Fi frequency and a system for harvesting solar energy were developed, later they were connected. The two voltage sources collected in series to add them and an MT3608 circuit was added to its output, to have a regulated voltage between 5 to 27 V at the system output and charge a 3.7 V lithium battery at 300 mA, and a 9 V battery. The antenna that was designed was a patch-type Sierpinski carpet until the second interaction, which together with a two-stage Cockcroft Walton multiplier is improved to acquire up to 254 mV, the solar panel on the other hand was a 6 V at 150 mA, when implementing the entire system, 27 V were acquired at the output, a voltage that, thanks to the MT3608 regulator, can be regulated to obtain a sufficiently voltage at the output of the system. To carry out several systems loads tests in different day conditions such as: cloudy, sunny and at night, managing to charge 90% 3.7 V and 9 V batteries in 4 h. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

View
No Thumbnail Available
Publication

The extensive green facade as a means of production and recovery of biodiversity in urban highland areas of Ecuador

2023 , Moya Vicuña, Susana

Green infrastructures have great potential to promote a productive system, which allows the development of a circular metabolism, as well as the protection and conservation of a biodiversity part. The present observation-based study seeks to analyze the potential productive and biodiversity benefits of a "traditional" extensive green wall located in Conocoto parish in Quitós city, Ecuador. For this purpose, the characteristics of the environment, the plant, and the conditions of its development are described in detail. The results provide recommendations for the design, maintenance, and application of extensive green walls in neotropical mountain climatic conditions, through the use of endemic Andean plants of a productive type, in this case the Passiflora mollisima, also commonly called "Taxo". © 2023 Elsevier Ltd. All rights reserved.

View
No Thumbnail Available
Publication

CLIMATE PLANNING AND LOCAL GOVERNMENT: ACTORS AND CLIMATE CHANGE MEASURES

2024 , Llacas Vicuña, Luis Deliberto

Urban development based on anthropogenic systems led to evident urban transformations on a global and local scale. Climate change is the product of these transformations, characterized by weather patterns and ecological systems alterations. These alterations cause impacts on urban dynamics, which generate severe social consequences. It becomes imperative to assume the inevitability of the climate phenomenon and adopt a new management model with adaptation and mitigation actions. The research addresses the climatic phenomenon in Ecuador, specifically in the urban area of Riobamba, emphasizing its planning instruments. The objective is to recognize the scope of local instruments and plans related to climate change and to identify actors involved through a map of actors according to their level of engagement and support for climate change action. The research contemplates a descriptive methodology with a qualitative approach using theoretical and argumentative techniques. The research considers documentary and fieldwork through methods such as documentary analysis, unstructured observation, in-depth interviews with strategic actors, case studies, and self-completed perception surveys of available subjects, corresponding to an exploratory and descriptive level. The results show that the local government did not consider initiatives aimed at climate planning and, despite programs and projects that seek to solve environmental problems, they need to be developed in detail or linked as measures against climate change. © 2024 ISEC Press.

View