Browsing by Author "Murillo Torres, Wilson Adrian"

Now showing 1 - 3 of 3

A review of the state-of-the-art of solar thermal collectors applied in the industry
(2022) Carrión Chamba, Willian Oswaldo; Murillo Torres, Wilson Adrian; Montero Izquierdo, Iván Andrés
The energy consumption associated with the industry sector represents 38% of the global energy demand, being an important aspect that marks the development of a country. In this sense, it is extremely important to diversify the different energy sources and incorporate the use of renewable energy sources, such as solar energy, not only with the idea of ensuring energy supply, but also as elements that enable the reduction of energy emissions generated by the use of fossil fuels. This work addresses the main solar collector technologies that may be incorporated into different types of industries, based on experiences and research in other countries. Based on this review, it has been seen that an important part of the industries worldwide requires temperatures up to 250 °C in their processes, which makes suitable the use of solar energy technology. Depending on each industry, flat plate, vacuum tube, Fresnel type or parabolic trough solar collectors may be used. Finally, the savings associated with some facilities are detailed and the challenges related to this sector are addressed.
Análisis técnico, económico y ambiental para la sustitución de combustible fósil en la planta de producción de asfalto del GAD Municipal de Cuenca mediante la implementación de un sistema de colectores cilindro parabólico
(Universidad de Cuenca, 2022-10-13) Carrión Chamba, Willian Oswaldo; Murillo Torres, Wilson Adrian; Montero Izquierdo, Iván Andrés
The present work evaluates the technical, economic and environmental feasibility of implementing a parabolic trough collectors (PTCs) system to generate heat in an asphalt plant in Cuenca, Ecuador. The proposal includes the use of an available land of 1.200 m2 in which the PTCs will be installed. To decide on the type of PTC, different systems were simulated in SAM (System Advisor Model) using the commercial models PTC 1800, Power Trough 250, Solar Wing EVO and Vicot. The performance of the four systems were compared with each other and the levelized cost of heat (LCOH) was used as an indicator to select the system with the lowest power generation cost. With the selected system, the economic benefits and emission reductions were analyzed considering that the conventional asphalt cement heating system (with amortized boiler) operates with a diesel boiler in a base scenario and with a fuel oil boiler in an alternative scenario. The results show that, of the systems analyzed, the one that generates energy at a lower cost is the Vicot PTC system (0,082 USD/kWht). This system with an aperture area of 390 m2 is capable of achieving an annual solar fraction of 31%. In the base scenario, the installation of the Vicot PTC system is economically viable, since under these conditions it was possible to obtain a net present value (NPV) of USD 21.274 and a discounted payback period of 8,89 years. In addition, in this scenario, the system would avoid the consumption of 5.698 gallons of diesel per year and the emission of 49,4 tCO2/year. On the contrary, in the alternative scenario, the possibility of installing the PTC system is not feasible, since the low price of fuel oil prevents recovering the invested capital and obtaining profits in the future.
Design and implementation of a web-based residential energy assessment platform: a case study in Cuenca-Ecuador
(Springer Nature, 2021) Carrión Chamba, Willian Oswaldo; Acosta Pazmiño, Iván Patricio; Montero Izquierdo, Iván Andrés; Valdivieso Garcia, Katy Viviana; Naranjo Ulloa, Christian Naranjo; Murillo Torres, Wilson Adrian; Carrion Chamba, Willian Oswaldo
Population confinement caused by the COVID-19 pandemic has led to an increase in household energy consumption. Electricity consumption in the residential sector in Latin America and the Caribbean increased by 20% during 2020 in comparison to 2019. An upsurge in electricity consumption at the residential level was observed between March and August of 2020 due to the emergency sanitary declaration in Ecuador. Viewed in this context, the residential customers of Cuenca have increased their consumption by around 13% during May 2020 in comparison to the same month of the previous year. Adopting energy efficiency and sufficiency measures could counteract this increase in energy and contribute to managing the demand in the residential sector. The present work aims to evaluate energy savings and emissions reduction in the residential sector in Cuenca through the design and implementation of a web-based platform for estimating electricity power savings. To develop the platform, information was gathered, through surveys, on the energy consumption of the average household. Power consumption of appliances was obtained from various sources, mainly from a database provided by a local appliance retailer. Energy-saving strategies for electrical and electronic appliances were taken from technical guidelines and academic sources. The functional and visual specifications of the platform were designed with specialized tools. The platform allows for calculating household electrical energy consumption and potential savings in energy, economic, and environmental terms in a simple and visually attractive manner. The study shows that 4 members of a family household consumes an average of 182 kWh/month, which is equivalent to 17.1 USD and an annual environmental footprint of 1068.9 kg of CO2. From this energy consumption, 57% is consumed by household appliances, 31% corresponds to technology and entertainment, and 12% represents lighting. Nevertheless, it is possible to reduce monthly energy consumption by 45% if energy sufficiency and efficiency measures are applied by consumers. This reduction will produce a monthly saving of 7.9 USD and an annual reduction of 485 kg of emissions. By implementing this web-based tool non-specialized users can analyze and decide the best way to reduce energy consumption, creating an appropriate energy culture with a positive impact on the household economy and promoting environmental sustainability.