86,715 research outputs found
Humanization and Architecture in Contemporary Hospital Building
No full textArchitecture and health are closely dependent. Architecture more positively influences human health as appropriating to its needs. However, humanization of hospital spaces wasn’t always evident. Since the end of Second World War, in fact, the hospitals are good buildings if they meet only the technological and functional requirements.
Dealing with humanization and its architectural quality means to focus the human needs and understand their interaction with the environment. In these terms, it is not easy to define the architectural quality, because it is based on principles, which in turn are not quantifiable. Although, there are several studies from different disciplines which allow choices in terms of “added value that can be achieved”.
In this paper, we propose the results of a research about this issue. Focusing on the psychological need of man, treasuring contributions of these disciplines (particularly about environmental psychology, expressive arts, Ergonomics, Evidence-based Design, the art of gardening, the studies on the perception of shape and color) and analyzing the functional and formal features of contemporary hospital, we developed a system evaluating architectural design choices, and a methodology defining guidelines to direct the choices aimed at the humanization of hospital space
Energy Policies and Sustainable Management of Energy Sources
No full textSustainability of current energy policies and known mid-term policies are analised in their multiple facets. First an overview is given about the trend of global energy demand and energy production, analysing the share of energy sources and the geographic distribution of demand, on the basis of statistics and projections published by major agencies. The issue of sustainability of the energy cycle is finally addressed, with specific reference to systems with high share of renewable energy and storage capability, highlighting some promising energy sources and storage approaches.</jats:p
Tradizione e innovazione nell'ambiente costruito di area mediterranea
No full textThe researches of the Ph.D in Building Engineering: Tradition and Innovation, focus on the issues related to the design methods, processes and materials of the historical and contemporary built environment. Some of these researches give a disciplinary contribution to the knowledge of the Mediterranean area
Experimental Validation of Maximum Constant Boost Control and Switching Frequency Optimal for three-phase Quasi-Z-Source Converters
No full textThis paper presents a modified modulation scheme for quasi-Z-Source converters, based on the Maximum Constant Boost Control (MCBC) concept and Switching Frequency Optimal (SFO) as reference signal. The effectiveness of the proposed technique is validated by comparing the obtained results (in terms of AC harmonic content and voltage stress) with those carried out from traditional modulation schemes. For this reason, a test bench has been assembled and the benefits of the SFO MCBC modulation scheme have been valuated
Investigation of inductive coupling solutions for E-bike wireless charging
No full textWireless charging of electric vehicle batteries is a major topic for academic and industrial research. The wireless charging is based on the inductive coupling between a primary coil, connected to the grid, and a secondary coil, connected to the vehicle battery. Wireless battery charging provides benefits in terms of comfort for the drivers, who should just park to start the charging operation, without needing to plug in the vehicle. Wireless charging is particularly convenient for E-bike users. For the bicycle charging, the inductive coupling should be implemented through a compact and light-weight solution. In this paper, different options of inductively coupled coils for E- bike charging are investigated in order to accurately evaluate the potential benefits in terms of efficiency and tolerance to misalignments
Design and realization of a bidirectional full bridge converter with improved modulation strategies
No full textIn this paper a Full-Bridge Converter (FBC) for bidirectional power transfer is presented. The proposed FBC is an isolated DC-DC bidirectional converter, connected to a double voltage source—a voltage bus on one side and a Stack of Super-Capacitors (SOSC) on the other side. The control law aims at the regulation either of the bus current (when the load requires power) or of the SOSC current (when the stack requires a recharge). Analysis and design of the proposed FBC are discussed. A Phase Shift Modulation (PSM) scheme is proposed, along with an improved modulation variant for the efficiency optimization, through a proper reduction of the transformer power losses. The realized prototype, compliant with automotive applications, is presented and experimental results are highlighted. The target power level is 2 kW
A Hybrid Storage System for Wireless Sensor Nodes powered with Energy Harvesting
No full textWith the recent development of Internet of Things (IoT) and Wireless Sensor Networks (WSN), research and industry have been increasingly focusing on the opportumty of collecting the energy arising from the environment. The Energy Harvesting provides the possibility to supply devices which are placed out of reach or in hazardous spots, e.g. the Wireless Sensor Nodes. Among the different parts belonging to an Energy Harvesting system, the power management network represents a challenging topic. In this paper a Hybrid Energy Storage System (HESS) usable for a WSN powered with Energy Harvesting, based on a battery-capacitor integration, is presented. The experimental results concerning the assembled buck-boost power converter are shown as well. The proposed prototype is based on the up-to-date technology of Gallium-Nitride (GaN) MOSFETs, ensuring reliable and fast operations, as well as small dimensions, appropriate for embedded target loads. The system is compliant with a storage system based on a 12 V battery, consisting of four series rechargeable coin-cell 3 V lithium batteries, and a multilayer chip ceramic capacitor rated for maximum 16 V
A comparison of different DC-DC converters for energy storage management in nearly-Zero Energy Buildings
No full textIn the recent years, there has been a notable interest towards renewable sources, energy saving and efficiency optimization, in order to reduce the damages brought by fine dust and greenhouse gases in terms of safety, health and environmental protection. In the building sector renewable sources and energy efficiency optimization are leading to a large scale employment of nearly-Zero Energy Buildings (n-ZEBs), meaning that the balance between produced and required energy is negligible. For a proper n-ZEB implementation, a power system architecture has to be accurately designed, according to the existing renewable sources, loads and storage systems. In this paper, an investigation on different topologies of DC-DC converters for energy storage management in a n-ZEB scenario is carried out, aiming at the efficiency and power density optimization. The interleaving technique is investigated as well, in order to evaluate its potential benefits according to the specific DC-DC topology. Target power level is 2 kW
- …
