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The European Commission is supporting many projects intended to improve the use of renewable energy sources and a special attention has been devoted to the case of large-scale urban areas. The Polycity project represents a significant demonstration of this energy policy, which was applied to 3 cities: Barcelona, Stuttgart and Torino. The case of Torino appears of particular relevance because it is...
Al loaded CaO catalysts for biodiesel synthesis were prepared with alkali co-precipitation method and investigated. The catalytic activities were examined with transesterification of triolein to oleic methyl ester (OME) as model reaction of biodiesel formation. The catalytic activity of these catalysts strongly depends on the amount of Al loading and formation of composite oxide phase on catalyst...
Monitoring system for the synchronous generators can be very different from case to case due to their purpose. Usually they have rather low sample rate and record only RMS values of physical quantities. This paper will describe a specific monitoring system for three synchronous generators in hydro power plant. Also some applications of such measurement system and usage of data recorded with it are...
Energy consumption is rapidly increasing with advancing technology. For this reason, solar energy from one of the renewable energy sources should be laid on. Because it can produce electrical energy, such as solar energy, photovoltaic conversion could also be utilized as a source of direct heat. Photovoltaic energy from sunlight most of the systems, the modules are collected by means of, converted...
Nowadays, there are several difficulties are met in the selection of appropriate conditions, place of use, and purpose of photovoltaic (PV) systems. The reason is that electrical power output of PV system shows a non-linear variation, unlike other applications, depending on the internal resistance of electrical devices (loads) as well as radiation intensity and environmental temperature. Therefore,...
We propose a boost converter for a stand-alone power supply system using single photovoltaic cell with maximum power point tracking based on two strategies.: ultra-low voltage input, operating energy of the boost converter powered by own output. It realized by discrete parts and low power consumption MCU. The boost converter starts at less than 0.4 V. It also starts at 88W/m2 of sunlight radiation...
LED lighting is the next wave of evolution in energy efficient lighting solutions. In order to conserve more energy, LED street lighting is quickly become a trend. In Taiwan, the government has established a policy to subsidize the use of LED lighting for road illumination to promote energy-saving measure. As of now, there are more than 30,000 LED lights already in service and more lights will be...
Smart grid systems, for being profitably implemented, will have to deliver advantageous results to costumers, investors and operators. This can be realised by providing efficient, secure and reliable systems, connecting distributed renewable energy sources and enabling advanced services. The analysis of those potential benefits should consider all the components of the smart grids from the energy...
This paper presents the hybrid differential evolution (HDE) in determining the tilt angle for photovoltaic (PV) modules. First, a Taguchi experiment was used to perform an efficient experimental design and analyze the robustness of the tilt angles for fixed south-facing PV modules. Following, the results from the Taguchi experiment were used as the initial data. Finally, the HDE method was applied...
The mixed reactant direct methanol fuel cell (MRFC) requires reaction selective electrocatalysts. We prepared the Co-C-N electrocatalyst by a reactive sputtering method and tested for the oxygen reduction and methanol oxidation reactions. The prepared Co-C-N electrocatalyst at 773 K had a high activity and selectivity for the oxygen reduction in the presence of methanol.
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