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Listar por autor "Ramos, Helena M."

Mostrando ítems 21-40 de 46

Improved Planning of Energy Recovery in Water Systems Using a New Analytic Approach to PAT Performance Curves

Pérez-Sánchez, Modesto; Sánchez-Romero, Francisco-Javier; Ramos, Helena M.; López Jiménez, Petra Amparo (MDPI AG, 2020-02)

[EN] The use of pumps working as turbines (PATs) to improve the energy efficiency of water networks has been studied in the last years. This recovery system is justified due to a low investment contrasting with the capacity ...
Intrusion problematic during water supply systems' operation

Mora Rodríguez, José de Jesús; López Jiménez, Petra Amparo; Ramos, Helena M. (International Energy and Environment Foundation, 2011)

[EN] Intrusion through leaks occurrence is a phenomenon when external fluid comes into water pipe systems. This phenomenon can cause contamination problems in drinking pipe systems. Hence, this paper focuses on the ...
Management tools for hydro energy interventions in water systems

Frijns, Jos; Cabrera Marcet, Enrique; Carrico, Nelson; Covas, Didia; Monteiro, Antonio J.; Ramos, Helena M.; Bolognesi, Andrea; Bragalli, Cristiana; Baki, Sotiria; Makropoulos, Christos (IWA Publishing, 2015)

[EN] There is significant potential for energy recovery through the use of micro-hydropower installations in water supply systems (WSS). To exploit the full potential of hydro energy in balance with the optimal hydraulic ...
Modeling irrigation networks for the quantification of potential energy recovering: a case study

Pérez-Sánchez, Modesto; Sánchez-Romero, Francisco-Javier; Ramos, Helena M.; López Jiménez, Petra Amparo (MDPI, 2016-06)

Water irrigation systems are required to provide adequate pressure levels in any sort of network. Quite frequently, this requirement is achieved by using pressure reducing valves (PRVs). Nevertheless, the possibility of ...
Modelo numérico del proceso de llenado de una conducción simple con válvula de aire

Coronado-Hernández, Oscar Enrique; Fuertes-Miquel, Vicente S.; Besharat, Mohsen; Ramos, Helena M. (Associacao Portuguesa dos Recursos Hidricos, 2019-12)

[EN] Water filling processes in pipes generate overpressures that must be considered so that the facilities do not fail during their operation. The filling manoeuvres with air trapped in water pipes have been studied by ...
Modified Affinity Laws in Hydraulic Machines towards the Best Efficiency Line

Pérez-Sánchez, Modesto; López Jiménez, Petra Amparo; Ramos, Helena M. (Springer-Verlag, 2018)

[EN] The development of hydraulic and optimization models in water networks analyses to improve the sustainability and efficiency through the installation of micro or pico hydropower is swelling. Hydraulic machines involved ...
Multi-objective optimization tool for PATs operation in water pressurized systems

Ramos, Helena M.; López Jiménez, Petra Amparo; Silva Santos, Rui; Pérez-Sánchez, Modesto (Taylor & Francis, 2022-07-03)

[EN] The use of pump working as turbine (PAT) instead of the traditional pressure regulation systems could allow for a recovery of the excess hydraulic energy to reduce the energy footprint of the water supply industry and ...
New Challenges towards Smart Systems' Efficiency by Digital Twin in Water Distribution Networks

Ramos, Helena M.; Morani, Maria Cristina; Carraveta, Armando; Fecarrotta, Oreste; Adeyeye, Kemi; López Jiménez, Petra Amparo; Pérez-Sánchez, Modesto (MDPI AG, 2022-04)

[EN] Nowadays, in the management of water distribution networks (WDNs), particular attention is paid to digital transition and the improvement of the energy efficiency of these systems. New technologies have been developed ...
Optimal energy efficiency of isolated PAT systems by SEIG excitation tuning

Fernandes, João F.P.; Pérez-Sánchez, Modesto; Ferreira, F.; López Jiménez, Petra Amparo; Ramos, Helena M.; Costa Branco, P.J. (Elsevier, 2019)

[EN] The use of pump working as turbine (PAT) was identified by many researchers as a way to improve the energy efficiency in the water systems. However, the majority of the researches consider the hydraulic machine connected ...
Optimization Strategy for Improving the Energy Efficiency of Irrigation Systems by Micro Hydropower: Practical Application

Pérez-Sánchez, Modesto; Sánchez-Romero, Francisco-Javier; Ramos, Helena M.; López Jiménez, Petra Amparo (MDPI AG, 2017)

[EN] Analyses of possible synergies between energy recovery and water management are essential for achieving sustainable advances in the performance of pressurized irrigation networks. Nowadays, the use of micro hydropower ...
Pathogen Intrusion flows in WDS: according to orifice equations

Mora Rodríguez, José de Jesús; Delgado Galván, Xitlali Virginia; Ortiz-Medel, Joaquina; Ramos, Helena M.; Fuertes-Miquel, Vicente S.; López Jiménez, Petra Amparo (IWA Publishing, 2015)

[EN] Pathogen intrusion may occur in water pipes when negative pressures allow external flows to enter through failures or leaks and then mix with safe water. It is applied a variation of the Fixed and Variable Area Discharge ...
PATs Behavior in Pressurized Irrigation Hydrants towards Sustainability

Pérez-Sánchez, Modesto; Fernandes, João F.P.; Costa Branco, P.J.; López Jiménez, Petra Amparo; Ramos, Helena M. (MDPI AG, 2021-05)

[EN] Sustainability and efficiency in irrigation are essential in the management of the water- energy-food nexus to reach the Sustainable Development Goals in 2030. In irrigation systems, the reduction of energy consumption ...
PATs Operating in Water Networks under Unsteady Flow Conditions: Control Valve Manoeuvre and Overspeed Effect

Pérez-Sánchez, Modesto; López Jiménez, Petra Amparo; Ramos, Helena M. (MDPI AG, 2018-04)

[EN] The knowledge of transient conditions in water pressurized networks equipped with pump as turbines (PATs) is of the utmost importance and necessary for the design and correct implementation of these new renewable ...
PATs selection towards sustainability in irrigation networks: Simulated annealing as a water management tool

Pérez-Sánchez, Modesto; Sánchez-Romero, Francisco-Javier; López Jiménez, Petra Amparo; Ramos, Helena M. (Elsevier, 2018-02)

[EN] Irrigation networks involve many water and energy aspects, in which the sustainability plays a paramount role. Nowadays, water tariff in irrigation networks represents a high percentage within of farmers' costs, ...
Rapid filling analysis with an entrapped air pocket in water pipelines using a 3D CFD model

Paternina-Verona, Duban A.; Coronado-Hernández, Oscar Enrique; Espinoza-Román, Héctor G.; Fuertes-Miquel, Vicente S.; Ramos, Helena M. (MDPI AG, 2023-03)

[EN] A filling operation generates continuous changes over the shape of an air¿water interface, which can be captured using a 3D CFD model. This research analyses the influence of different hydro-pneumatic tank pressures ...
Smart Water Grids and Digital Twin for the Management of System Efficiency in Water Distribution Networks

Ramos, Helena M.; Kuriqui, Alban; Besharat, Mohsen; Creaco, Enrico; Tasca, Elias; Coronado-Hernández, Oscar E.; Pienika, Rodolfo; Iglesias Rey, Pedro Luís (MDPI AG, 2023-03)

[EN] One of the main factors contributing to water scarcity is water loss in water distribution systems, which mainly arises from a lack of adequate knowledge in the design process, optimization of water availability, and ...
Smart Water Management towards Future Water Sustainable Networks

Ramos, Helena M.; McNabola, A.; López Jiménez, Petra Amparo; Pérez-Sánchez, Modesto (MDPI AG, 2020)

[EN] Water management towards smart cities is an issue increasingly appreciated under financial and environmental sustainability focus in any water sector. The main objective of this research is to disclose the technological ...
Street Lighting and Charging Stations with PATs Location Applying Artificial Intelligence

Pineda-Sandoval, Joseph D.; Arceniaga-Nevárez, Jose Antonio; Delgado-Galván, Xitlali; Ramos, Helena M.; Pérez-Sánchez, Modesto; López Jiménez, Petra Amparo; Mora Rodríguez, Jesús (MDPI AG, 2023-02)

[EN] This research proposes a methodology with multi-objective optimization for the placement of Pumps operating As Turbines (PATs), energizing street lighting, devices for monitoring the water network, and charging stations ...
Subatmospheric pressure in a water draining pipeline with an air pocket

Coronado-Hernández, Oscar Enrique; Fuertes-Miquel, Vicente S.; Besharat, Mohsen; Ramos, Helena M. (Taylor & Francis, 2018)

[EN] An air pocket's behaviour inside of a pipeline during transient conditions is of great importance due to its effect on the safety of the hydraulic system and the complexity of modeling its behaviour. The emptying ...
Sustainable water-energy nexus in the optimization of the BBC golf-course using renewable energies

Ramos, Helena M.; Zilhao, M.; López Jiménez, Petra Amparo; Pérez-Sánchez, Modesto (Taylor & Francis, 2019-03-16)

[EN] Water distribution networks and irrigation systems consume high energy quantities that need to be recovered if the water managers want to meet sustainable systems. A sustainability optimization is proposed in this ...