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Clean Electrical Power, 2009 International Conference on

Date 9-11 June 2009

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Displaying Results 1 - 25 of 140
  • [Title page]

    Publication Year: 2009 , Page(s): i
    Save to Project icon | Request Permissions | PDF file iconPDF (1018 KB)  
    Freely Available from IEEE
  • Technical program

    Publication Year: 2009 , Page(s): ii - xx
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (386 KB)  

    First Page of the Article
    View full abstract»

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  • Author index

    Publication Year: 2009 , Page(s): 1 - 4
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    Freely Available from IEEE
  • Modular small-CHP plants optimized design as a way to reduce CO2 emissions

    Publication Year: 2009 , Page(s): 1 - 8
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1384 KB) |  | HTML iconHTML  

    This paper proposes the analysis of two case studies about the optimized design of modular small-CHP plants. The analysis were carried out using DiOGene, an algorithm designed to simulate the operation of such plants also considering the integral constraints imposed by Italian regulations. Two hospitals were the subject of case studies: in fact such kind of public building is usually an ideal site for a CHP plant, due to its peculiar energetic loads. Results show that, carefully choosing the plant configuration, it is possible to achieve significant economic and fuel savings, consequently reducing CO2 emissions. The analysis also points out how the modular approach, due to its intrinsic flexibility that increases the number the degrees of freedom, is the most suitable one for an effective matching between site characteristics and the machines. View full abstract»

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  • Improvement of combustion efficiency and minimizing CO and NO emissions of a swirling fluidized-bed combustor firing rice husk

    Publication Year: 2009 , Page(s): 9 - 16
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (271 KB) |  | HTML iconHTML  

    In this study, a swirling fluidized-bed combustor (SFBC) using an annular spiral air distributor was fired with rice husk. In order to control NO emission from the combustor, rice husk was moisturized by adding water to ldquoas-receivedrdquo fuel, while CO emission was mitigated via injection of secondary air into the bed splash zone. The SFBC was tested at constant fuel feed rate for variable fuel-moisture content and primary air supply. Effects of the fuel quality and excess air on radial and axial temperature and gas (O2, CO and NO) concentration profiles in the reactor, as well as on the combustion efficiency and emissions, are discussed. Effective control of CO and NO emissions and high (> 99%) combustion efficiency are achievable when firing moisturized rice husk in this SFBC. View full abstract»

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  • Design and operation of a local cogeneration plant supplying a multi-family house (9,5 kW electrical / 35 kW thermic power) - A field report

    Publication Year: 2009 , Page(s): 17 - 21
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1188 KB) |  | HTML iconHTML  

    In this paper, design and operation of a small cogeneration biomass plant dasiaTurdanitsch 2psila is presented. The plant, powered by woodchips, is suitable to maintain heat supply for a three family house. It is capable of delivering 9.5 kW electrical power to the mains and 30 kW thermal power used for heating the domestic hot water and the building respectively. A detailed description of the plant is followed by a description of the efficiency measurement setup. Practical experiences from two years of operation and measurements concerning the electrical as well as the thermal efficiency are presented. Financial figures of the year 2008 are presented, showing the profitability for the prototype plant. View full abstract»

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  • Fuel saving variable speed generating set

    Publication Year: 2009 , Page(s): 22 - 28
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (829 KB) |  | HTML iconHTML  

    The paper presents method and systems improving quality of power produced by renewable energy sources (RES). The power, delivered by RES, is not stable and not easy predictable. Therefore an additional controllable power sources is applied. There are considered three basic topologies of the controllable generating set used as conditioner. There are fixed speed system with synchronous generator, adjustable speed doubly fed induction generator (DFIG) and adjustable speed system using brushless permanent magnet generator. The simplest fixed speed system, using synchronous generator, operates usually in region of low efficiency of diesel engine whereas the most efficient is adjustable speed system using permanent magnet generator. Laboratory tests of the adjustable speed generation system using permanent magnet confirm its ability to operate as adjustable speed system. View full abstract»

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  • PV - wind - fuel cell - electrolyzer micro-grid modeling and control in Real Time Digital Simulator

    Publication Year: 2009 , Page(s): 29 - 34
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (190 KB) |  | HTML iconHTML  

    Micro-grid consisting of Photovoltaic (PV) arrays, Wind Turbine Generator (WTG), Fuel Cell, Supercapacitor and Electrolyzer (EL) serving a village load is modeled and implemented in Real Time Digital Simulator (RTDS). Operating scenarios under fluctuating load conditions using an appropriate control strategy are simulated and analyzed. The advantages of using RTDS for micro-grid studies are presented. View full abstract»

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  • 3-D PV-cell model by means of FEM

    Publication Year: 2009 , Page(s): 35 - 40
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1742 KB) |  | HTML iconHTML  

    This paper proposes a model of PV cell utilizing finite element method (FEM). The model has been implemented in Comsol Multiphysics environment. At the first step the model has been separately validated from the thermal point of view and from the electrical one. Successively, in order to verify if the proposed model is able to represent the thermo-electrical behavior of the PV cell under real conditions, both the effects have been simultaneously applied. Simulation results confirm the goodness of the proposed PV-cell model. View full abstract»

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  • An innovative photovoltaic field simulator for hardware-in-the-loop test of power conditioning units

    Publication Year: 2009 , Page(s): 41 - 45
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (164 KB) |  | HTML iconHTML  

    In this work a review of photovoltaic (PV) field simulators and a project for the development of an innovative hardware-in-the-loop (HIL) PV field simulator are presented. The simulator is conceptually designed to be part of a future PV field demonstrator to be realized in the area of Trieste (Italy), which will include measurement facilities, networked PV fields, university laboratories and other research centers. View full abstract»

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  • A mathematical model to determine the electrical energy production in photovoltaic fields under mismatch effect

    Publication Year: 2009 , Page(s): 46 - 51
    Cited by:  Papers (23)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (323 KB) |  | HTML iconHTML  

    Among the electrical energy production systems from renewable sources, the photovoltaic one represents today one of the most efficient and technically tested choice. In this paper the authors present a mathematical model that allows the maximization of the generated power of photovoltaic (PV) plants under unequally radiation conditions. In particular, thanks to the model of a PV plant, unequally radiated, developed in Matlab-Simulink environment, in this paper the mismatch problem of PV plants is dealt with. The simulations curried out allow to assert that by putting into action re-configuration techniques of series-parallel connections of PV plants, under unequally radiation, can allow to optimize the electrical energy production from these plants. This result opens scenarios of conceivable modifications to the PV field configurations today chosen during the design stage and unchangeable during the operating stage. View full abstract»

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  • Modeling defects of PV-cells by means of FEM

    Publication Year: 2009 , Page(s): 52 - 56
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2301 KB) |  | HTML iconHTML  

    The paper introduces the issue of the typical defects present in PV-cell. Characteristic defects are introduced and the attention is focused on two specific defects: linear edge shunt and hole. These defects are modeled by means of Finite Element Method (FEM) and implemented in Comsol Multiphysics environment in order to analyze the temperature distribution in the whole defected PV-cell, because abnormal temperatures reduce the PV-cell efficiency. Simulation results are compared with the thermo-grams of real cases and the goodness of the models is confirmed. View full abstract»

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  • ISWEC: Design of a prototype model with gyroscope

    Publication Year: 2009 , Page(s): 57 - 63
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1663 KB) |  | HTML iconHTML  

    The extraction of energy from ocean waves has been investigated in Europe since the 1970s. Hundreds of devices have been proposed, many have been tested in some form or other and a few of these have been commercialized. In this paper a gyroscopic wave energy converter is studied and a procedure to design a prototype model to be tested at the wave tank at the University of Edinburgh is outlined. A linearized model of the device is extrapolated and used as a mathematical tool in the design process. The final version of the prototype model is verified using the complete nonlinear model. View full abstract»

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  • Stalling behaviour improvement by appropriately choosing the rotor resistance value in wave power generation plants

    Publication Year: 2009 , Page(s): 64 - 67
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (117 KB) |  | HTML iconHTML  

    In this paper the performance of the Wells turbine has been improved, studying its stalling behaviour when the flow coefficient reaches a specific characteristic value. The generator increases its velocity when the flow coefficient of the turbine is approaching the critical point at which the turbine losses power. View full abstract»

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  • Efficiency optimization in a wave energy hyperbaric converter

    Publication Year: 2009 , Page(s): 68 - 75
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (351 KB) |  | HTML iconHTML  

    This paper considers the problem of optimizing the efficiency of the primary conversion on an ocean wave energy hyperbaric converter. This wave energy converter (WEC) is an oscillating-body linked to a hyperbaric chamber. By solving the equation of motion of the power take-off mechanism, it is shown that optimal conditions for improving the absorbed power relate the buoy parameters and the chamber pressure with the incident waves. This work also proposes an algorithm for finding the best time interval that the body remains locked when latching control strategy is used to enhance the efficiency of the WEC. Numerical simulations are presented in order to evaluate the optimum conditions of the hyperbaric WEC and the performance of the proposed algorithm. View full abstract»

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  • Harnessing marine current energy with tethered submerged systems: Experimental tests and numerical model analysis of an innovative concept

    Publication Year: 2009 , Page(s): 76 - 86
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1274 KB) |  | HTML iconHTML  

    An innovative system concept in marine/river current technologies is presented. A floating submerged body is used as a support to turbines and a casing for electrical and control systems. A series of experimental test has been performed in a towing tank on a test model using already characterized turbines, in order to evaluate its behavior in response to current actions. The present paper is aimed to report the results of such tests and to obtain a simple dynamic model to compare with experimental results. View full abstract»

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  • Experimental test campaign on an innovative device to harness clean energy from tidal and river current.

    Publication Year: 2009 , Page(s): 87 - 92
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3383 KB) |  | HTML iconHTML  

    The main object of this paper is to present the design and the results of an experimental test campaign on an innovative device for the exploitation of marine and river currents. All the work has been carried out at the Department of Aerospace Engineering of the University of Naples ldquoFederico IIrdquo and the test campaign has been first performed in the naval towing tank belonging to Naval Department of same University and then in real condition in Messina Strait between Sicily island and mainland. This location is the only one in Italy suitable as test site with tidal current reaching a maximum speed of 3 m/s. The turbine's blade was first carefully designed with particular care for the cavitation problems. Two different series of experimental test in naval tanks aimed to optimize the general layout of the device and the tests performed in Messina Strait mainly aimed to confirm the feasibility of the system and to evaluate its response in real operating conditions. The tests have confirmed the good dynamic behavior of the whole system and its feasibility to be scaled up to real scale. View full abstract»

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  • Control systems for Wraspa

    Publication Year: 2009 , Page(s): 93 - 97
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (734 KB) |  | HTML iconHTML  

    The paper discusses the need for a wave energy converter (WEC) to sense and respond to its environment in order to survive and to produce its maximum useful output. Such systems are described for Wraspa, a WEC being developed at Lancaster University and first reported at ICCEP in 2007. The main control system that continually monitors and optimises the power-take-off is termed ldquoStepwise Controlrdquo and seeks to continually adjust the damping force applied to the collector to suit the wave force that drives it. The complete instrumentation and control system that will be needed is considered briefly, including the above PTO control system; direction sensing and heading control; tide level compensation; condition monitoring and provisions for access and maintenance. View full abstract»

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  • Energy efficiency technologies for clean electric power from biomasses: The state of the art and perspectives for the future

    Publication Year: 2009 , Page(s): 98 - 102
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (332 KB) |  | HTML iconHTML  

    This paper reports the results of studies on energy production by using bio-masses. The use of bio-masses is encouraged all over the world due to the increasing prices of oil and natural gas and the growing concern for pollution and CO2 emissions as well as to the possibility of using local resources and help local economies. Bio-masses have been classified according to type and production chain. Data on world production of bio-masses and their use for energy transformation are also reported. The main techniques for the energy transformation of bio-masses are investigated and some practical examples are explained in details. View full abstract»

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  • Biofuel for the energy efficiency on a building with small CCHP

    Publication Year: 2009 , Page(s): 103 - 110
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (736 KB) |  | HTML iconHTML  

    This document reports the development of a technical and economical study related to the use of a renewable energy source - biomass for electricity and heat production. It is a hybrid and autonomous system with solar PV panels and environment friendly process aiming the reduction of energy demand, costs and emissions. This energy model is a new sustainable standard about efficiency consumption energy (electrical and thermal demands) of a small hotel building, with the biomass gasification cogeneration technology. This system is one relevant contribute to certify the building agree to the new national legislation of building thermal behaviour. View full abstract»

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  • Absolute energy efficiency metric for carbon footprint resource management and network optimisation

    Publication Year: 2009 , Page(s): 111 - 116
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3476 KB) |  | HTML iconHTML  

    We describe the first attempt to define an absolute energy efficiency figure that can be applied to any data network or ICT device to provide an understanding of its absolute energy efficiency. The resulting equation can be used as an objective comparative tool to assist in comparing the energy-efficiency performances of equivalently functional systems. More importantly, it also gives a guide as to how much more energy efficiency should theoretically be able to be squeezed out of a system. We describe how our absolute energy efficiency figure can be applied within a networking context to achieve optimised carbon footprint resource allocation. Based on Dijkstra's algorithm for open shortest path first (OSPF) traffic engineering, we show how additional ldquogreenrdquo control bits can be added to the latest internet protocol (IP) standard to achieve scalable and enhanced-functionality solutions in the problem of carbonfootprint minimization. Our techniques find generic application. View full abstract»

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  • The first generation biodiesel: The effects of raw material on physical properties, oxidation stability and emissions

    Publication Year: 2009 , Page(s): 117 - 123
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (404 KB) |  | HTML iconHTML  

    The aim of this study was to compare oxidation stability, emissions during engine tests and fuel properties of biodiesels. The biodiesels were produced from different raw materials using the transesterification process. The raw materials used were: salmon oil, fox fat, rainbow trout oil, rapeseed oil and linseed oil. The engine tests showed differences in emissions with different biodiesels. The fatty acid profiles were measured and their effect on oxidation stability and other fuel properties were noticeable. The effect of synthetic antioxidant was also measured for different biodiesels. The oxidation stability increase was related to the raw material used to produce the fuel. The oxidation stability of biodiesel blends was measured. The oxidation stability of the blended fuel increased when biodiesel with a higher oxidation stability level was introduced. These measurements indicate that oxidation stability can be enhanced with antioxidants and by blending diesel fuel or other biodiesels together. View full abstract»

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  • Glucose biofuels properties in the bloodstream, in conjunction with the beta cell electro-physiology

    Publication Year: 2009 , Page(s): 124 - 127
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (101 KB) |  | HTML iconHTML  

    The modern medicine cannot be conceived without the latest news in engineering technology. One of the challenges is related to the novel energy source inside the human body that can be useful for implantable devices, as pacemakers or in vivo insulin micropumps or biosensors. In this paper, the biofuel properties of the glucose that is regulated within the endocrine pancreas, is analyzed in order to offer alternative methods to biogenerators, using the inside glucose from the bloodstream itself. The glucose concentration is regulated by the beta cells activity, via the insulin hormone released in the bloodstream. The insulin exocytose in 7 steps is modeled as a digital system, expressed in an organigram, proving the cellular self-organizing. The exocytose phenomenon is accompanied by electrical behavior at membranar level. The entire electrophysiological model of the beta cell is analyzed in order to offer a useful model for diagnosis in medicine, using the inside glucose from the bloodstream. View full abstract»

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  • Rational biomass energy use for water heating in rural schools

    Publication Year: 2009 , Page(s): 128 - 134
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1666 KB) |  | HTML iconHTML  

    This work has the following Contribution: the introduction of an innovation in the efficient cooker-oven integrated unit -UICHE: unidad integrada cocina-horno eficiente- in order to fulfil another function: water heating so as to continue taking profit of its efficient thermal-energetic behaviour. Its proposal is: ldquoThe design, development, transference and monitoring of this simple alternative system, appropriate and appropriable, on earth and with rational energyrdquo. Its objectives are the following: 1) To contribute to give an answer to three of the components of the complementary facilities of the rural schools like community habitat: cooking-baking of food, water heating and air heating; 2) To use renewable energy efficiently in order to diminish the demand of firewood fuel; 3) To decrease the impact of the environment, minimizing the emission of smoke, particles and toxic gases reaching optimal combustion; 4) To increase people's life quality, in general, and that of low income sectors, in particular, decreasing thermal radiation and contamination in the work area of the users of those systems; 5) To spread and show technology so as to facilitate its adoption both on a community and familiar level; 6) To perform transference, building and experimentation in rural schools which provide students with breakfast and lunch services, improving the feeding, hygiene and comfort processes; 7) To assess its thermal-energetic performance; 8) To generate undertakings to allow additional economic incomes for the community group. The methodology employed includes research-participative action as a multiplying effect, assisted self-management as a facilitating accomplishment means, a training workshop as a change factor and the efficient and rational energy use for the protection of the natural environment. The results obtained are: a) alternatives for the UICHE water heating subsystem have been designed participatively with rational use of firewood as fuel, b) the mos- t convenient materials and components have been determined, c) these facilities are built as demonstrative models in three rural schools, in articulation with the Secretary of Education of the Province of Tucumaacuten, by means of the business unit of the UNT (UNe-UNT) and with funds of the energy and transport program of the National Direction of Special Programs and projects of the Secretary of Science, Technology and Productive Innovation, d) pertinent measures and evaluations have been initiated. The scope of the work includes: to spread and transfer its record, the reasons which back it up; its description; building; functioning and the inter-sectorial instances (community and institutions: government and scientific-academic), interdisciplinary and socio-pedagogical; all that to enable the generation and adoption of those in relation to the requirements of the social, economic and cultural background, the environmental, energetic and sanitary factors of the beneficiaries under consideration. View full abstract»

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  • Hybrid stand-alone power supply using PEMFC, PV and battery - Modelling and optimization

    Publication Year: 2009 , Page(s): 135 - 140
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (275 KB) |  | HTML iconHTML  

    Hybrid Stand-Alone Power Supplies (HSAPS), coupling several renewable energy sources and means of storage, are interesting for supplying small communities in remote areas. During the conception, the sizing of the elements in such systems, in terms of power and capacity, is a difficult and important aspect. This design must ensure the lowest cost of energy and must depend on the meteorological characteristics of the site where the system is installed as well as the consumption profile. To answer this question, a model of the system and a method to optimise the energy cost are proposed. Through a case study with a photovoltaic generator, a battery and a fuel cell, it is shown that an optimal sizing is able to deliver energy with a cost around 0.5EtildeUR/kWh. The model and the results are presented and discussed in this paper. View full abstract»

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