Laboratory scale wind energy harvester Fagarasan, Ioana; Stamatescu, Iulia; Nichiforov, Cristina ...
2017 9th IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications (IDAACS),
2017-Sept., Letnik:
2
Conference Proceeding
Present and future global energy challenges assume a growing role of intelligent information technologies. Among the global objectives lay a continuous energy supply, making efficient use of energy ...in all its forms. Renewable energy and energy harvester systems have become a hot topic to the academia and industrial representatives, due to the last technical developments and economical support. This paper focuses on wind flow as an energy source and presents a laboratory scale wind energy harvester application suitable for powering small scale consumers. The hardware architecture is completed by a mathematical modeling of the wind energy harvester and a proposed power management system used to cover in an efficient manner the energy requirements. To prove the effectiveness of the system developments, simulations have been conducted.
A flow around rotating blades of micro wind turbine was visualized and measured by PIV technique. The diameter of micro wind turbine is 500 mm. This micro wind turbine is a unit of integrated wind ...energy system. The micro turbine has features as large solidity and long chord length. The measurement was carried out with 3 × 1.8 m2 wind tunnel at the wind speed in the range from 3 to 10 m/sec. Twin YAG laser was employed to the measurement. An approaching flow to the wind turbine and its wake were visualized with a phase locked measurement system. Stream lines in an approaching flow was discussed for the design of the blade in the visualized two-dimensional plane. A wake flow of the wind turbines was examined for the improvement and noise reduction of this system. It is found that the wake flow was disturbed and large scale vortices was observed in all wind speed condition.
In response to the growing demand of clean energy for electricity use, tapping renewable sources like hydro, wind and solar are sought. This study aimed to analyze the dynamic performance of a ...Photovoltaic (PV) system when connected to a micro wind turbine. The 3kVA PV system was modeled based from the specifications enumerated in BP 7180S PV module. With the properly designed hybrid power system (HPS) controller and data acquisition modules, the PV system performed satisfactorily as exemplified by voltage, current and frequency within the normal values.
This chapter deals with micro and small wind turbines and focuses on small wind turbines in the United Kingdom over the past decade (2005–15), which represents a period of “boom and bust” for ...building mounted micro-wind turbines in particular. The sector was trying to break out from yacht battery charging to the emerging grid connected micro-generation sector during this period. Micro-wind turbines are typically defined as having a rated power up to 1.5kWp (where p refers to peak power) and their most widely used application is in yachts for battery charging. Small wind turbines are rated between 1.5 and 100kWp and are generally free standing, pole or tower mounted turbines. Small wind turbines at the lower end of this range are sometimes used in off-grid systems, but turbines above 20kWp are almost always grid connected. The majority of micro and small wind turbines are horizontal axis three blade designs.
In our work we have studied the feasibility of supplying maximum possible peak hour load through micro generation using rooftop wind turbines and solar PV panels in a low wind speed urban area. Due ...to easy access to grid in a city, a `grid-tie' arrangement has been designed in this paper that can ensure the sale of excess off-peak generations to make the system profitable. Choice of proper turbine and DC storage device based on above system considering corresponding cost analysis for a developing country like Bangladesh has also been presented here. Finally a new tariff structure suitable for designed arrangement has been proposed.
Blades of a novel wind turbine system based on the principles of impulse turbines were designed in 3D and tested by computational fluid dynamics (CFD) simulation. This new turbine system is suitable ...to construct on the tops of high buildings in urban areas. A rotor with more than 20 blades is used to convert wind energy into mechanical energy in an internal chamber. In the upstream of this rotor, 25 guide vanes are fixed between a hub and the tunnel for changing the flow direction. Through CFD modelling in different conditions, both power output and coefficients were obtained. The modelling results have shown that the turbine blades have good potential for the new wind turbine system in an urban area.
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