The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Received signal strength (RSS)-based indoor location system (ILS) implemented using a ZigBee-based sensor network is presented. The proposed method is based on the field amplitude decay law in free-space conditions, that is used jointly with RSS measurements in a set of static receivers (Rx) to establish a cost function, whose minimum gives the estimated transmitter position (Tx). It is assumed that...
This It is estimated that over 80% of all product environmental impacts are determined during the design phase of a product and eco-design methodology is the right tool to avoid these mistakes during the design process. In 2011, the ISO brought out a new standard (ISO 14006:2011) that provides guidelines to assist companies in managing eco-design. As the combination of eco-design and energy labelling...
Batteries are increasingly being used as a primary power source and for energy recovery and storage in renewable energy systems such as photovoltaic (solar cell) applications, wind energy and hybrid and battery electric vehicles. This paper aims to analyze the life cycles of lead acid, lithium-ion and nickel-metal hydride batteries in their applications and also some methods that may be used to safely...
This paper describes the complete design of a wind micro-inverter for a Permanent Magnet Generator (PMG) based on a Savonious-Gorlov turbine. Two power electronic stages have been implemented. A Boost converter with Maximum Power Point Tracking (MPPT) operation has been used, as the first stage, in order to extract energy from the turbine and deliver it to a 400 V DC bus. A single-phase inverter with...
Nowadays the use of renewable energy is one of the most popular topics in engineering where energy self-consumption interest is growing. This paper deals with the design of a small wind turbine generation system (2.5 kW) for single phase grid connection. The system must be efficient and totally autonomous. In this paper is included a hardware description of the system, an overview of the control strategy...
We investigate the application to biomimetics on the development and creation of a new type of exterior walls for buildings. We study and explore envelopes as found in nature with an eye on their application to architecture and engineering. Our hypothesis is the following: Is it possible to obtain greater effciency and performance in the construction of exterior walls in buildings by mimicking nature...
Power regulation of all converter units in a micro-grid should not be only determined by load demand, but also by the available power of each unit, i.e. a converter fed by a battery. Energy management control is essential in order to handle the variety of prime movers which may include different types of renewable energy sources (RES) and energy storage systems (ESS). Specifically, the recharging...
The aim of this Project is to provide electricity to areas which aren't close to the electrical grid, or other spaces where we don´t want to depend on it, using PV panels to generate the required power. Furthermore, the exterior design was an important part of it because the structure was wanted to be functional, but also visually attractive. That's why the exterior structure was given the shape of...
A low-cost 18W intelligent LED driver for energy savings is presented. The intelligent LED driver has a DALI interface that allows it to be included in an upper lighting smart grid. So, it must provide galvanic isolation. The proposed LED driver is based on a two stage scheme with 24V safety voltage. The first stage is based on a PFC Flyback converter operating in the boundary conduction mode, meeting...
Buildings consume in Spain to 26.1% of final energy, corresponding to 17.5% of the domestic sector and 8.6% of the service sector. These data make us reflect on the energy savings that could be carried out by taking efficient measures in the enclosures of buildings, on the one hand, and systems that provide the energy needed to obtain comfort conditions. Thus the current legislation displays a large...
The European initiative MOBISEC focuses on improving road safety for citizens as cyclists and pedestrians. The main objective is to gather information of the usual routes of cyclists on a medium-sized town, Murcia (Spain), and their interaction with other users of public roads. Through the use of technological innovations implemented on mobile devices, and the active participation of citizens, MOBISEC...
The new electric car is a vehicle with special needs in all aspects. Tires are one of the most important, so from the Workroom on Renewable Energy a new granular composite for tires has designed. It is formed by a series of beach sand ground particles embedded in a matrix ground urethane rubber. The urethane rubber is a material that degrades early. It serves to give cohesion to the ground sand particles...
Renewable energy integration to achieve the challenges of energy independence and sustainable development is one the most important priorities of the European Union (EU). Biomass is expected to make an important contribution to the energy and environmental objectives. The 20% of energy consumed in the EU countries should be based on renewable energy sources with about two-thirds from biomass by 2020...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.