Conference Agenda

This paper provides a panoramic view of the Circular Economy (CE), its challenges, and opportunities within a region of Colombia, an emerging market. It not only offers a detailed understanding of the governance needed to implement public policies like the
National Circular Economy Strategy (NCES), but also analyzes CE models in a specific region, providing the perspectives of a total of 69 organizations developing CE practices. An online survey of 73 items was administered to organizations in the Department of Bolívar
during 2022. This comprehensive view allows for a better understanding of the experiences of organizations in Colombia and their process of implementing circular economy practices.

The objective of this research was to analyze the thermal performance of a mixed natural and forced convection solar dryer with multiple arc-shaped ribs coupled to the upper part of the absorber plate and to determine the drying kinetics for the drying process of quinoa (Chenopodium quinoa Willd). The mixed solar dryer is low cost and easy to build, it has an air blower system that operates autonomously with a photovoltaic panel. Thermal performance and mathematical models for drying kinetics were determined for quinoa. Performance tests were conducted for mass flow rates of 0.189 kg/min, 1.197 kg/min, 1.547 kg/min and 1.893 kg/min. The results reveal that, the maximum average thermal efficiency of the solar air heater was 77 % for an average solar irradiance of 1055 W/m2 and for a mass flow rate of 1.197 kg/min where the average drying temperature was 56 °C. The maximum average overall efficiency achieved was 23.28 % and the minimum drying time was 2.1 hours, for a flow rate of 1.197 kg/min. The mixed solar dryer has a maximum efficiency for a forced flow of 1.02 kg/min and the drying time is reduced to 68% compared to open sun drying. The Page model is the best fit for describing the drying kinetics of quinoa under forced flow conditions, and the Wang and Singh model is the best fit for natural convection drying of quinoa.

This study presents a comprehensive bibliometric review of eco-innovation and sustainability within the engineering sector, emphasizing its pivotal role in minimizing environmental impacts and advancing sustainable development. Analyzing 768 publications from 2000 to 2024, sourced from Scopus and Web of Science, the review employs the PRISMA method and advanced bibliometric tools, including VOSviewer and Bibliometrix, to examine scientific production, collaboration networks, and thematic trends. The findings indicate exponential growth in research output, with significant contributions from China, the United Kingdom, and Italy, as well as notable institutions such as Delft University of Technology. Core themes such as sustainability, eco-innovation, and green innovation dominate the field while emerging topics like circular economy and eco-design point to new research directions. Finally, this review maps the current research landscape to identify critical opportunities for advancing eco-innovation within engineering. It serves as a valuable resource for researchers, policymakers, and industry leaders dedicated to promoting sustainability and addressing global environmental issues.

Insects are a hyperdiverse class, with great relevance in environmental studies, due to the great variety of ecosystem services they provide including regulation, support, provisioning, and cultural services. The objective of this study was to determine the relationship between the types of insect traps and ecosystem services. The evaluation of ecosystem services was carried out in March 2015 using chromatic traps, Van Someren-Rydon, and direct collection in two areas of the San José ecological farm (Citrus and Butterfly). A total of 4918 specimens were found, distributed in 49 families and 191 morphospecies. The most abundant family was Muscidae (55.18%), related to the Van Someren-Rydon trap with decomposing fish, followed by the families Sarcophagidae and Tephritidae. On the other hand, according to the Brillouin index, chromatic traps with attractant were the most homogeneous, while according to the Simpson index no group was predominant at any sampling point. In relation to the trophic position, the most abundant food guild was that of decomposers in Van Someren-Rydon traps with fish bait, with the least abundant being phytophagous and decomposers in direct collections.

- The use of fossil fuels to generate energy directly or indirectly produces gases and other pollutants that, when emitted into the atmosphere, contribute to the degradation of air quality, including affecting the health of the population, and to the intensification of the greenhouse effect, identified as the main responsible for global climate change, leading to the accumulation of carbon in the atmosphere. The present proposal aims to move a propeller mounted on the shaft of a direct current (DC) motor of a mini power plant, driven by a fuel cell powered by green hydrogen. The hydrolyzer will be powered by a photovoltaic plate, which will produce green hydrogen. A small-scale mini-power plant prototype plays a key role in product and solution development, offering a cost-effective way to test and improve concepts, engage stakeholders, and ensure technical feasibility before investing significant resources in full-scale projects. In this sense, the project involves a mini power plant using a fuel cell powered by green hydrogen that will drive a DC electric motor with a propeller. To generate hydrogen, the hydrolysis process will take place using a photovoltaic plate. Finally, it is expected to move the shaft-mounted propeller of the direct current (DC) motor using the green hydrogen concept, and prospect the data for a high-power electric drive system

Urban growth has led to an increase in the construction of multi-family buildings, which has increased the demand for underground parking spaces. In this study, the ventilation system of these spaces was optimized using Computational Fluid Dynamics (CFD) simulation to reduce the carbon monoxide concentration. The mathematical modeling of air flow and carbon monoxide dispersion was based on Navier-Stokes equations, which allowed the evaluation of different ventilation configurations and improved air distribution. The results show that the optimization reduced the carbon monoxide evacuation time from 13.20 minutes to 7.00 minutes, increased the air velocity from 0.1 m/s to 1.5 m/s, and reduced energy consumption by 40%, ensuring compliance with the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) 62.1 standard. As a result, these results can be used to design and improve underground parking garage ventilation systems.