Análisis de la disminución de emisiones de CO2 en el acondicionamiento de un espacio con un sistema pasivo

JULIO CESAR BRITO REYNA (2023, [Tesis de maestría])

En el contexto global de la dependencia de fuentes de energía fósil en el modelo energético actual, la electricidad desempeña un papel fundamental en el crecimiento y desarrollo de las ciudades. Derivado del consumo excesivo de estas fuentes, se genera la presencia de fenómenos como el Cambio Climático, evidenciando así el uso generalizado de sistemas de climatización en edificaciones durante la temporada de verano en áreas geográficas con climas tropicales y cálidos.

El trabajo presenta un estudio comparativo anual de los impactos ambientales de dos sistemas de climatización en un espacio construido previamente: un sistema activo y un sistema pasivo. El estudio se llevó a cabo mediante la simulación de procesos sustentables utilizando el software TRNSYS® y también se evaluaron los indicadores de Calentamiento Global, Agotamiento de la Capa de Ozono y Agotamiento de combustibles fósiles, por mencionar a algunos, utilizando la metodología de Análisis de Ciclo de Vida (ACV) en el software OpenLCA. Los resultados demuestran una reducción de los impactos ambientales mediante el uso de elementos pasivos en comparación con el uso de dos aires acondicionados y su consumo eléctrico, evitando una huella de carbono de un 98% en su etapa de construcción y hasta en un 100% en su etapa de operación.

Este estudio contribuye al conocimiento sobre la importancia de implementar estrategias de climatización pasiva en edificaciones existentes como una alternativa sostenible y de bajo impacto ambiental. Los hallazgos respaldan la necesidad de promover soluciones más eficientes y respetuosas con el medio ambiente en el sector de la climatización, en línea con la transición hacia un modelo energético más sostenible y la mitigación del Cambio Climático.

In the global context of dependence on fossil fuel energy sources in the current energy model, electricity plays a crucial role in the growth and development of cities. This is evident in the widespread use of air conditioning systems in buildings during the summer season in areas with tropical and warm climates.

This work presents an annual comparative study of the environmental impacts of two cooling systems in a pre-existing space: the active system and the passive system. The study was carried out through the simulation of sustainable processes using the TRNSYS® software, and various indicators such as Global Warming Potential (GWP100a), Ozone Depletion Potential, and Fossil Fuel Depletion were evaluated using the Life Cycle Assessment (LCA) methodology in the OpenLCA software. The results demonstrate a reduction in environmental impacts through the use of passive elements compared to the use of two air conditioning units and their electricity consumption, avoiding a carbon footprint of 98% during its construction stage and up to 100% during its operational stage

This study contributes to the understanding of the importance of implementing passive cooling strategies in existing buildings as a sustainable and low-impact alternative. The findings support the need to promote more efficient and environmentally-friendly solutions in the cooling sector, in line with the transition towards a more sustainable energy model and the mitigation of Climate Change.

INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS Energía electrica, climatización, sustentabilidad, Cambio Climático Electricity, cooling, sustainability, Climate Change

Fabrication of PVDF/PMMA Polymer for Sustainable Energy Harvesting .

JOSE RAYMUNDO LEPPE NEREY FERNANDO ZENAIDO SIERRA ESPINOSA MIGUEL ANGEL BASURTO PENSADO JOSE ALFREDO RODRIGUEZ RAMIREZ (2023, [Artículo])

The synthesis of blends that combine properties of two or more polymeric materials is increasingly investigated due to the versatility of the synthesis and its growing potential for many applications, including sustainability. Their characteristics are defined mainly by the synthesis conditions. Therefore, this paper details the synthesis process of easy-to-handle films using mixing method. The procedures and drawbacks found during the preparation of composite films are described. Polymeric compounds formed by the mixture of polyvinylidene fluoride (PVDF) and polymethyl methacrylate (PMMA) are addressed, varying the concentration, and evaluating their impact on the piezoelectric capacity. Films were formed through the spin-coating technique and characterized by optical and holographic microscopes. The results showed that composites with a concentration of 50 wt.% or larger of PVDF in the blend acquire a morphology with a granular appearance, however at lower concentrations they present a homogeneous morphology similar to that of PMMA. A homogeneous distribution of PVDF in the PMMA stands out. However, excessive contents of PMMA are associated to peaks and non-uniformities detected like multicolored regions by digital holography. Controlled strength-strain laboratory tests allowed to evaluate the film blends performance. The results indicate noticeable improvements in voltage output for a composition 70wt% PVDF and 30 wt% PMMA.

INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS Polymer blends, Power generation, Energy harvesting, Piezoelectricity,

Testing innovations for adoption of newer and more adapted maize varieties

Michael Ndegwa Pieter Rutsaert Jason Donovan Jordan Chamberlin (2023, [Objeto de congreso])

Changing Production Conditions Genetic Innovations Maize Hybrids CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA TESTING MAIZE VARIETIES YIELDS FARMERS EXPERIMENTATION

Offshore wind energy climate projection using UPSCALE climate data under the RCP8.5 emission scenario

MARKUS SEBASTIAN GROSS (2016, [Artículo])

In previous work, the authors demonstrated how data from climate simulations can be utilized to estimate regional wind power densities. In particular, it was shown that the quality of wind power densities, estimated from the UPSCALE global dataset in offshore regions of Mexico, compared well with regional high resolution studies. Additionally, a link between surface temperature and moist air density in the estimates was presented. UPSCALE is an acronym for UK on PRACE (the Partnership for Advanced Computing in Europe)-weather-resolving Simulations of Climate for globAL Environmental risk. The UPSCALE experiment was performed in 2012 by NCAS (National Centre for Atmospheric Science)- Climate, at the University of Reading and the UK Met Office Hadley Centre. The study included a 25.6-year, five-member ensemble simulation of the HadGEM3 global atmosphere, at 25km resolution for present climate conditions. The initial conditions for the ensemble runs were taken from consecutive days of a test configuration. In the present paper, the emphasis is placed on the single climate run for a potential future climate scenario in the UPSCALE experiment dataset, using the Representation Concentrations Pathways (RCP) 8.5 climate change scenario. Firstly, some tests were performed to ensure that the results using only one instantiation of the current climate dataset are as robust as possible within the constraints of the available data. In order to achieve this, an artificial time series over a longer sampling period was created. Then, it was shown that these longer time series provided almost the same results than the short ones, thus leading to the argument that the short time series is sufficient to capture the climate. Finally, with the confidence that one instantiation is sufficient, the future climate dataset was analysed to provide, for the first time, a projection of future changes in wind power resources using the UPSCALE dataset. It is hoped that this, in turn, will provide some guidance for wind power developers and policy makers to prepare and adapt for climate change impacts on wind energy production. Although offshore locations around Mexico were used as a case study, the dataset is global and hence the methodology presented can be readily applied at any desired location. © Copyright 2016 Gross, Magar. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reprod

atmosphere, climate change, Europe, Mexico, sampling, time series analysis, university, weather, wind power, climate, risk, theoretical model, wind, Climate, Models, Theoretical, Risk, Wind CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA CIENCIAS DE LA TIERRA Y DEL ESPACIO OCEANOGRAFÍA OCEANOGRAFÍA