Browsing by Author "Jervis, Freddy"

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Diseño de un banco de pruebas para evaluar propagación de la llama bajo condiciones de flujo controlada
(LACCEI Inc., 2018-09) Jervis, Freddy; Acosta, Alvaro; Mite, Stephanie
The present project was developed with the purpose of allowing the evaluation of the behavior of construction materials, when a flame is propagated during combustion. To fulfill this objective, a test bench was designed to verify these materials under the conditions of a controlled environment. The methodology to be followed was to select the different components that integrate the test bench, through experimental tests and analysis by simulation with a computer program. The main components that make up the test bench are: axial fan, turbulence reducing device (honeycomb), protective meshes, voltage regulator and the sample holder. The test materials that were part of this project included: PMMA (Polymethylmethacrylate), woods and derivatives, polypropylene and polyurethane (elastomer), to be evaluated through a simulation and verify that they meet the limitations of our test bench, such as the maximum working temperature inside the test chamber and the rate of heat released. The taking of data and measurements of the flammability of the material by means of a fire propagation device are under the ASTM 2058 standard. As a result, the maximum glass surface temperature calculated was 275 °C, and the air flow velocity is obtained as 0.26 m/s. The sizing of the equipment was carried out to allow testing on samples 12 cm wide, 30 cm long and 10 - 25 mm thick. Once the design of the test bench was completed, it was determined that the required workspace is 0.87 x 1.08 m and a height of 1.24 m.
Influence of socio-economic factors on household solid waste (HSW) generation of the city of Guayaquil, Ecuador.
(LACCEI, Inc., 2019-07) Hidalgo, Jose; Amaya, Jorge Luis; Jervis, Freddy; Moreira, César
This paper estimated the household solid waste (HSW) generation and composition in Guayaquil, Ecuador. The study also determined the socio-economic factors influencing the waste generation of the households in the city by using Ordinary Least Square (OLS) regression. For this effect, a stratified random sampling methodology was used, resulting in the selection of 665 sample households for this study. The applied methodology resulted in a composition of HSW: organic waste (72,6%), plastic (8,7%), glass (2,4%), metals (1,7%), paper and cardboard (6,6%),fabrics (2,5%), dust and ashes (2,9%) and other residues, such as hazardous and electronics (2,6%). This study suggests new insights concerning the role of socioeconomic characteristics and its effects in the generation of household waste and waste composition in Guayaquil, Ecuador.
Waste to Energy Potential of Domestic Waste Cooking Oil in Guayaquil: A review.
(LACCEI Inc., 2020-07) Hidalgo, José; Coello, Silvia; Crespo, Tania; Amaya, Jorge; Soto, Manuel; Jervis, Freddy; Moreira, Cesar
This paper examines the opportunity for waste cooking oil as a potential source of energy by means of (i) production of biodiesel, (ii) direct burning and (iii) biodegradation. It offers a profound review of existing literature and it measures possible uses of the waste cooking oil produced in the city of Guayaquil. In addition, important chemical and physical properties are presented after the development of a sampling process for after laboratory testing. Conclusions show that the most suitable technology is biodiesel generation, followed by biodegradation, but direct burning is found to be not a possible solution due to its kinematic viscosity.