18 documents found, page 1 of 2
Seasonal Storage for Space Heating using Solar DHW Surplus
Brites, Gonçalo; Garruço, Manuel; Fernandes, Marco S.; Pinto, Diogo M. Sá; Gaspar, Adélio RodriguesDue to the seasonality of solar energy, achieving 100 % of annual solar fraction for domestic hot water (DHW) production is only possible by greatly oversizing the collector area of a solar system, thus creating a significant energy surplus in summer. This simulation study investigates the possibility of using this surplus to promote space heating during winter, in a moderate South European climate, to try achi...
Diminishing benefits of thermal mass in Iranian climate: Present and future sce...
Rodrigues, Eugénio; Fereidani, Nazanin Azimi; Fernandes, Marco S.; Gaspar, Adélio R.Thermal mass, a pivotal element in a building’s performance, functions as an indoor thermal buffer. While literature underscores its advantages, the enduring impact of thermal mass amid climate change remains uncertain. This study methodically assesses thermal mass effects in 21 Iranian cities across contemporary and future climates, juxtaposing heavyweight and lightweight constructions. The EPSAP algorithm, a ...
Prospective life cycle approach to buildings’ adaptation for future climate and...
Rodrigues, Carla; Rodrigues, Eugénio; Fernandes, Marco S.; Tadeu, SérgioThe existing building stock is crucial for enhancing decarbonization targets and mitigating climate change. This article delves into a methodological approach that combines prospective life cycle assessment, building thermal simulation using projected future climate data, and global sensitivity analysis to pinpoint the most influential parameters under current climate conditions and future scenarios. The method...
Building for tomorrow: Analyzing ideal thermal transmittances in the face of cl...
Rodrigues, Eugénio; Parente, Jean; Fernandes, Marco S.The climate will become hotter, and buildings will perform differently as outdoor conditions evolve. If the lowest energy demand is desired, it is crucial to determine the ideal thermophysical properties of the envelope over the buildings' life span. However, the scientific literature is still scarce in providing a compelling answer. Therefore, this study (i) determines ideal thermal transmittance values (U-val...
Future weather generator for building performance research: An open-source morp...
Rodrigues, Eugénio; Fernandes, Marco S.; Carvalho, DavidMathematical morphing of historical weather data to match the projected climate change scenario is a commonly used method to generate future weather files for building energy simulation. It is known for preserving the local weather characteristics, which is particularly important when designing or analyzing high-performance buildings. Researchers may use one of the available morphing tools. Unfortunately, curre...
Climate change and ideal thermal transmittance of residential buildings in Iran
Rodrigues, Eugénio; Fereidani, Nazanin Azimi; Fernandes, Marco S.; Gaspar, Adélio RodriguesClimate change will make the Iranian climate hotter and drier. This increase in the harshness of the boundary conditions poses a new question of whether today’s high-performance buildings, whose envelope thermophysical properties are optimized for the current climate, will underperform. Therefore, it is important to (i) identify the regions in Iran that will lead to such underperformance and (ii) determine to w...
A new wind direction-driven heat convection model is needed in dynamic simulati...
Fernandes, Marco S.; Rodrigues, Eugénio; Costa, José J.Wind plays an essential role in the heat convection on building outside surfaces. In EnergyPlus, a dynamic simulation program, heat convection models present several limitations reported by the scientific community. However, this communication reveals and discusses some implications that highlight the importance of developing more accurate models. The current models are first analyzed to identify what are the p...
The contribution of ventilation on the energy performance of small residential ...
Fernandes, Marco S.; Rodrigues, Eugénio; Gaspar, Adélio Rodrigues; Costa, José Joaquim; Gomes, ÁlvaroEfficient ventilation is an effective method for reducing thermal loads inside buildings, thus decreasing cooling energy consumption. This is especially relevant in warmer climates. Therefore, it is important to better understand the role that different ventilation parameters play on air-conditioning consumptions. This study analyzes the effect of three different ventilation parameters – air flow rate, minimum ...
Overheating risk in Mediterranean residential buildings: Comparison of current ...
Rodrigues, Eugénio; Fernandes, Marco S.One of the effects of climate change is global warming, which will increase cooling demand in buildings. However, scientific literature does not show consensus on the risk of highly insulated buildings being prone to overheating. This paper presents a statistical comparison of two synthetic datasets for current and future climates in sixteen Mediterranean locations. The weather data for the 2050 climate project...
Thermal transmittance effect on energy consumption of Mediterranean buildings w...
Rodrigues, Eugénio; Fernandes, Marco S.; Gaspar, Adélio Rodrigues; Gomes, Álvaro; Costa, José J.High thermal mass construction is commonly used to reduce cooling energy consumption during the summer period as a passive design strategy in the Mediterranean region. Although being a generalized design practice, the benefit to the building performance is not fully consensual within the scientific community. This work explores the influence of thermal transmittance on the energy efficiency of buildings with di...