An assessment of the thermal refurbishment of an outpatient medical center in a tropical location, such as the City of San Francisco de Campeche, was presented with the aim to diminish its energy consumption. A year-long energy audit of the facility was conducted to formulate and validate a numerical simulation model while scrutinizing enhancement strategies. The examined improvement alternatives encompass passive adjustments to the roof (utilizing insulating materials, applying reflective coatings, and installing a green roof), modifications to active systems incorporating inverter technology, and alterations to the walls via reflective paint. The outcomes of the simulated enhancement scenarios were assessed utilizing energy, environmental, and economic metrics: key performance index (KPI), equivalent CO₂ emission index (CEI), and net savings (NS). These results were subsequently juxtaposed against TOPSIS decision-making algorithms to ascertain the alternative that optimally balances the three options. It was identified that using reflective paint on the roof provides the best energy benefits and contributes to mitigating emissions from electricity use. Furthermore, combining this passive technology with the integration of inverter air conditioning systems offers the best economic return at the end of 15 years. For its part, the TOPSIS method indicated that by prioritizing the financial aspect, the reflective coating on the roof combined with inverter air conditioning is enough. However, adding a wall with insulating paint brings environmental and energy benefits. The results of this work serve as a starting point for the analysis of other post-occupied buildings in the region and others under tropical climatic conditions.

El enfoque convencional para alcanzar el confort térmico generalmente se centra en modificar la temperatura de consigna en edificios totalmente climatizados. Sin embargo, el enfoque del confort térmico adaptativo es una alternativa que considera la interacción entre los edificios, el clima local y los usuarios para permitir mejoras significativas en el ahorro de energía. El trabajo analiza la viabilidad de implementar estrategias de confort térmico adaptativo, comparando modelos adaptativos basados en la norma ASHRAE 55-2020 y un modelo regional para la tipología climática tropical de México, contrastando los resultados respecto del enfoque estático. Se analizó térmicamente 13 locaciones del Estado de Campeche obteniendo que las estrategias de ventilación son aplicables en todo el Estado y que ambos modelos aseguran mejoras en el consumo de energía. Además, los resultaron siguieren que es necesario desarrollar más modelos adaptativos locales para proponer estrategias con mejor potencial de impacto en la región.

This work seeks to analyze and reduce the percentage in gram/gram of exhaust gases that cause the greenhouse effect using an aeronautical miniturbine. For this research, mixtures of biodiesel (own) and commercial aviation kerosene are used in a BEE-80 model miniturbine. A test bench was implemented which has the microturbine installed, it is monitored telemetrically using an Arduino system and a combustion gas analyzer (CO2, CH4, SOx), the turbine parameters allow experimenting with the different mixtures to find the optimal one. It is operated with mixtures varying the percentage of biodiesel from 10%, 20%, 30%, 40% to 50% (B10-B50), to observe the changes in power, consumption, lubricity and mainly the emissions released to the atmosphere. The mixture that showed the best efficiency, an acceptable reduction in greenhouse gases and better lubrication, was B20, in addition to acceptable consumption compared to the other mixtures.

An analysis of the feasibility of installing a ground-to-air heat exchanger (ICTA) was carried out under meteorological conditions in the city of Mérida, Yucatán, Mexico, with a low-cost IoT (internet of things) system for time monitoring. real. The thermal inertia of the subsoil is used to minimize the demand for fossil fuels and support environmental conservation. The energy potential and thermal properties of the environment and subsoil in the Yucatan Peninsula were identified. Measurements were carried out in real time with a microcontroller programmable wifi (ESP8266) to store the data obtained for later analysis. A study of the behavior of the climate in situ was carried out with the help of a meteorological station. The analysis focused particularly on a house in the city of Mérida, Yucatán, Mexico. The results were, Ktierra negra 0.1355 W/mK and Ksascab, 0.2105 W/mK.