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Mostrando ítems 11-20 de 90
Middleware to Operate Smart Photovoltaic Irrigation Systems in Real Time
(MDPI, 2019)
Climate change, water scarcity and higher energy requirements and electric tariff compromises the continuity of the irrigated agriculture. Precision agriculture (PA) or renewable energy sources which are based on communication ...
Proposal for the Design of Monitoring and Operating Irrigation Networks Based on IoT, Cloud Computing and Free Hardware Technologies
(MDPI, 2019)
In recent decades, considerable efforts have been devoted to process automation in agriculture. Regarding irrigation systems, this demand has found several difficulties, including the lack of communication networks and the ...
Techno-Economic Assessment of Heat Transfer Fluid Buffering for Thermal Energy Storage in the Solar Field of Parabolic Trough Solar Thermal Power Plants
(MDPI, 2017)
Currently, operating parabolic trough (PT) solar thermal power plants, either solar-only or with thermal storage block, use the solar field as a heat transfer fluid (HTF) thermal storage system to provide extra thermal ...
Optimal Operation Strategies into Deregulated Markets for 50 MWe Parabolic Trough Solar Thermal Power Plants with Thermal Storage
(MDPI, 2019)
The evolution of electric generation systems, according to relevant legislation, allows for the parallel evolution of the installed power capacity of renewable resources with the development of technologies for renewable ...
Modelling of the Acetification Stage in the Production of Wine Vinegar by Use of Two Serial Bioreactors
(MDPI, 2020)
In the scope of a broader study about modelling wine acetification, the use of polynomial black-box models seems to be the best choice. Additionally, the use of two serially arranged bioreactors was expected to result in ...
New Omnidirectional Sensor Based on Open-Source Software and Hardware for Tracking and Backtracking of Dual-Axis Solar Trackers in Photovoltaic Plants
(MDPI, 2021)
In this work, an omnidirectional sensor that enables identification of the direction of the celestial sphere with maximum solar irradiance is presented. The sensor, based on instantaneous measurements, functions as a ...
Optimization of the Acetification Stage in the Production of Wine Vinegar by Use of Two Serial Bioreactors
(MDPI, 2021)
In the scope of a broader study about wine acetification, previous works concluded that using a single bioreactor hindered simultaneously reaching high productivities with high substrate consumption and the use of two ...
Analysis of the Influence of Terrain Orientation on the Design of PV Facilities with Single-Axis Trackers
(MDPI, 2020)
This paper investigates how to optimally orient the photovoltaic solar trackers of an axis parallel to the terrain, applying the sky model of Hay–Davies. This problem has been widely studied. However, the number of studies ...
A Cost-Effective and Efficient Electronic Design for Photovoltaic Systems for Solar Hot Water Production
(MDPI, 2021)
A significant percentage of energy consumption in buildings is to produce hot water. Photovoltaic solar heating can be considered a clean and renewable energy option—easy to install, silent, and without maintenance—to ...
Low Electron Temperature Plasma Diagnosis: Revisiting Langmuir Electrostatic Probes
(MDPI, 2021)
This article describes a method of measurement of the current-to-probe voltage characteristic curve of a Langmuir electrostatic probe immersed in a plasma characterized by a low electron temperature that is only one order ...