105 documents found, page 1 of 11
Comprehensive approach to photovoltaic power forecasting using numerical weathe...
Pereira, Sara; Canhoto, Paulo; Oozeki, Takashi; Salgado, RuiPhotovoltaic power forecasting is essential for maintaining electric grid stability and efficiently integrating solar energy power plants into the national power generation system. However, it remains challenging due to the complexity of accurately predicting solar radiation across varying weather conditions and diverse photovoltaic system configurations. This study addresses these challenges by developing a no...
Hydrogen storage in heterogeneous reservoirs: evaluating well configurations an...
Pereira, Pedro; Carneiro, Júlio; Canhoto, Paulo; Pedro, Jorge; Khudhur, Karwan; Mazezo, AugustoThe urgency in mitigating the climate change effects and the expecting rise of energy consumption in the coming decades will require zero-carbon sources like renewables, fossil fuels with carbon capture and storage, and sustainable storage solutions like underground gas storage. Hydrogen geological storage in porous rock formations is expected to play a major role for sustainable energy systems, offering large-...
Interactions and Impacts on the Efficiency of Underground Hydrogen Storage in S...
Pereira, Pedro; Carneiro, Júlio; Canhoto, Paulo; Pedro, Jorge; Khudhur, Karwan; Mazezo, AugustoThis study, part of the H2GeoStore R&D project, investigates underground hydrogen storage in saline aquifers as a solution for large-scale, long-term energy storage to support renewable energy systems. Using reservoir simulations of cyclic hydrogen injection and withdrawal under various conditions and reservoir heterogeneities, the research evaluates performance metrics like injectivity, productivity, and stora...
Hydrogen geological storage in saline aquifers based on seasonal and hourly cyc...
Pereira, Pedro; Canhoto, Paulo; Khudhur, Karwan; Carneiro, Júlio; Pedro, Jorge; Mazezo, AugustoUnderground hydrogen storage (UHS) in saline aquifers is a scalable solution to balance renewable energy intermittency. This study evaluates the techno-operational feasibility of UHS through dynamic numerical simulations using a 3D heterogeneous synthetic model representing real reservoir properties of a saline aquifer. Two operational cyclic profiles (seasonal and hourly) were developed based on real energy da...
Understanding Mineral Dust Through a Doctoral Alliance
Marenco, Franco; Amiridis, Vasilis; Costa, Maria João; Kandler, Konrad; Kazadzis, Stelios; Klose, Martina; Pérez García-Pando, Carlos; Ryder, ClaireWe present an example of how a doctoral network can bring together multidisciplinary expertise and novel scientific advances in atmospheric dust. This network (Dust-DN) has started operations and is a strategic alliance of high-profile partners, able to leverage unique facilities for atmospheric research and innovative space missions. The network aims to improve our understandings of dust processes and microphy...
Hydrogen geological storage in saline aquifers based on seasonal and hourly cyc...
Pereira, Pedro; Canhoto, Paulo; Khudhur, Karwan; Carneiro, Júlio; Pedro, Jorge; Mazezo, AugustoUnderground hydrogen storage (UHS) in saline aquifers is a scalable solution to balance renewable energy intermittency. This study evaluates the techno-operational feasibility of UHS through dynamic numerical simulations using a 3D heterogeneous synthetic model representing real reservoir properties of a saline aquifer. Two operational cyclic profiles (seasonal and hourly) were developed based on real energy da...
Prediction of Global Solar Irradiance on Parallel Rows of Tilted Surfaces Inclu...
Pereira, Sara; Canhoto, Paulo; Salgado, RuiSolar photovoltaic power plants typically consist of rows of solar panels, where the accurate estimation of solar irradiance on inclined surfaces significantly impacts energy generation. Existing practices often only account for the first row, neglecting shading from subsequent rows. In this work, ten transposition models were assessed against experimental data and a transposition model for inner rows was devel...
Assessment of thermal modeling of photovoltaic panels for predicting power gene...
Pereira, Sara; Canhoto, Paulo; Oozeki, Takashi; Salgado, RuiThis study presents an assessment of thermal modeling for photovoltaic modules, focusing on power output prediction using manufacturer-provided data along with irradiance and weather-related variables. Several steady-state thermal models based on empirical correlations were evaluated for computing the temperature of the photovoltaic module. Additionally, a dynamic model was developed based on the energy conserv...
Assessment and mapping of the solar irradiation in Timor-Leste using ERA5, MERR...
Sarmento, Nelson; Potes, Miguel; Canhoto, PauloThis work is part of the Master's thesis in Solar Energy Engineering and aims to assess and map the solar resource in East Timor. To this end, reanalysis data from ERA5 and MERRA2 were used, involving a grid with an area between 123.75º and 127.5º of longitude, and between -9.5º and -8.0º of latitude over a period of 23 years (2000-2022), as well as Solcast data acquired at 39 points distributed throughout the ...
Modelling a solar volumetric receiver coupled to a parabolic dish: Heat transfe...
Garcia-Ferrero, Judit; Merchán, R.P.; Santos, M.J.; Medina, A.; Calvo Hernández, A.; Canhoto, Paulo; Giostri, A.Concentrated Solar Power (CSP) plants are commonly recognized as one of the most attractive options within carbon-free power generation technologies [1] due to their high efficiency and because the implementation of hybridization and/or storage is feasible. In this work, a small-scale system focused on distributed production, in the range of kWe [2], is modelled. A parabolic dish collects direct solar power tow...