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Assessment of the thermal comfort of a masonry building - numerical study
Carneiro, Ana; Gonçalves, Pedro; Saraiva, Rafael; Oliveira, Daniel V.; Martins, Luís Barreiros; Teixeira, J. Carlos; Rodrigues, NelsonThe need to preserve masonry buildings in earthquake-prone areas leads to the analysis of their behavior when subjected to seismic actions. When studying different strengthening solutions, it is important to reassess the behavior of the building that has been reinforced regarding its initial resistance performance. In parallel, energy studies should be carried out to understand if the reinforcement solution bei...
Development of a numerical optimization model for sizing hydrogen refuelling st...
Ferreira, Ana C. M.; Ferreira, José Paulo; Teixeira, S. F. C. F.; Martins, Luís Barreiros; Teixeira, J. CarlosInterest in hydrogen as a transportation fuel is growing. Fuel cell electric vehicles fed by hydrogen are expected to play a key role in the decarbonization of the transportation sector. Its impact will depend upon the existence of reliable and cost-effective fuelling stations. Numerical simulation allows sizing hydrogen refuelling on-site stations in order to identify the most cost-effective solution for a spe...
Sawdust drying process in a large-scale pellets facility: an energy and exergy ...
Silva, João; Ferreira, Ana C. M.; Teixeira, S. F. C. F.; Martins, Luís Barreiros; Ferreira, Eduardo; Teixeira, J. CarlosBiomass is an important renewable resource that can be directly used as a raw material in energy converting processes, in wood-based industries, or it can be transformed into other types of biofuels. Its thermochemical properties, such as moisture content and chemical composition, directly influence the lower heating value and, consequently, systems' efficiency. To overcome these problems, drying processes are ...
Energy performance of a service building: Comparison between EnergyPlus and Revit
Silva, João Pedro Vasconcelos; Brás, José; Noversa, Ricardo; Rodrigues, Nelson José Oliveira; Martins, Luís Barreiros; Teixeira, J. CarlosCurrently, the energy consumption study in buildings is very important, since it is one of the sectors of activity where there is great potential to improve energy efficiency. On the market, there are several simulation software, and the aim of this work consists in conducting a comparison between two dynamic simulation software, EnergyPlus, and Revit, with respect to the results obtained of thermal loads and a...
Efficiency improvement of vehicles using temperature controlled exhaust thermoe...
Brito, F.P.; Pacheco, N.; Vieira, R.; Martins, Jorge; Martins, Luís Barreiros; Teixeira, J. Carlos; Gonçalves, L. M.; Oliveira, J.; Hall, M. J.One of the main obstacles for the use of thermoelectric generators (TEGs) in vehicles is the highly variable thermal loads typical of driving cycles. Under these conditions it will be virtually impossible for a conventional heat exchanger to avoid both thermal dilution under low thermal loads and TEG overheating under high thermal loads. The authors have been exploring an original heat exchanger concept able to...
Thermal simulation of a supermarket cold zone with integrated assessment of hum...
Noversa, Ricardo; Silva, João Pedro Vasconcelos; Rodrigues, Nelson José Oliveira; Martins, Luís Barreiros; Teixeira, J. Carlos; Teixeira, S. F. C. F.This work seeks to analyze the thermal comfort of the occupants in a large building of Commerce and Services, integrating measures of assessment and energy efficiency promotion. The building is still in the construction phase and at its conclusion, will correspond to a supermarket located in the Central region of Portugal. For the evaluation of thermal comfort, Fanger’s methodology was used, where the Predicted...
Development and assessment of an over-expanded engine to be used as an efficien...
Brito, F. P.; Martins, Jorge; Lopes, Francisco; Castro, Carlos; Martins, Luís Barreiros; Moreira, A. L. N.A range extender (RE) is a device used in electric vehicles (EVs) to generate electricity on-board, enabling them to significantly reduce the number of required batteries and/or extend the vehicle driving range to allow occasional long trips. In the present work, an efficiency-oriented RE based on a small motorcycle engine modified to the efficient over-expanded cycle, was analyzed, tested and simulated in a dr...
Human-inductively powered lightweight electric vehicles: Sustainable transporta...
Cardoso, Luiz Alberto Lisboa Silva; Meléndez, Andrés Augusto Nogueiras; Martins, Luís Barreiros; Afonso, João L.An increasing interest in inductive lanes for dynamic wireless power transfer, as a mean of on-the-road charging of electric vehicles, has been observed in recent times. Most of current related research and development efforts have so far been guided by the presumption of a future large-scale adoption of electric vehicle types whose payload and power train characteristics are compatible with the standard intern...
Simulation of PMV and PPD thermal comfort using EnergyPlus
Esteves, Diogo; Silva, João Pedro Vasconcelos; Rodrigues, Nelson José Oliveira; Martins, Luís Barreiros; Teixeira, J. Carlos; Teixeira, S. F. C. F.This work aims to simulate the thermal comfort for the user of a movie theater in the dimension related to considering the thermal environment parameters by the using EnergyPlus software. The results from simulation are then compared with the experimental ones. In order to calculate and model the thermal comfort, it was necessary a proper characterization of the space that included the measured occupancy, therm...
Performance and emissions associated with natural gas injection in Diesel engin...
Costa, Joaquim da; Martins, Jorge; Marques, Sérgio; Martins, Luís Barreiros; Brito, F.P.The use of alternative fuels such as compressed natural gas, as dual fuel for the diesel engine, is an interesting object of study and will diversify fuel sources, reduce fuel cost and carbon dioxide emissions. However, there are several issues that need to be considered, such as the specific tuning of the internal combustion engine for that fuel combustion. Also, the addition of a gaseous fuel to the mix will ...