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Developments in Renewable Energy Technology ( ICDRET), 2009 1st International Conference on the

Date 17-19 Dec. 2009

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Displaying Results 1 - 25 of 68
  • [Front cover]

    Publication Year: 2009 , Page(s): c1
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  • [Front inside cover]

    Publication Year: 2009 , Page(s): c2
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  • Message from the ICDE 2010 Workshop Chairs

    Publication Year: 2009 , Page(s): 1
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  • Foreword from the Organizing Chair

    Publication Year: 2009 , Page(s): 1
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  • Foreword from the Technical Chair

    Publication Year: 2009 , Page(s): 1
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  • Table of contents

    Publication Year: 2009 , Page(s): i - vii
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  • ICDRET 2009 Committees

    Publication Year: 2009 , Page(s): 1
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  • Techno-economic feasibility of grid connected solar PV system in Bangladesh

    Publication Year: 2009 , Page(s): 1 - 4
    Cited by:  Papers (3)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (182 KB) |  | HTML iconHTML  

    A techno-economic feasibility analysis is done for 500 kW grid connected solar photovoltaic (PV) system at a northern location of Bangladesh. HOMER and RETScreen computer tools and monthly average solar radiation data from NASA is used for this study. The unit electricity production cost is found to be 14.51 BDT (Bangladeshi Taka) based on project lifetime 20 years and 10% discount rate. It is also found that the unit cost varies between 15.25 BDT and 14.10 BDT, using the monthly highest and lowest solar radiation at different locations in Bangladesh. Considering the selling price of electricity 10 BDT/kWh with 5% electricity escalation rate annually to the grid, the IRR, equity payback and benefit-cost ratio are found to be around 5.6%, 13.1 years and 0.68 respectively without considering any clean energy facilities. The total annual greenhouse gas reduction is estimated to be 658 tons. View full abstract»

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  • Interconnection of PV based generator and its impact on Bangladesh power system stability

    Publication Year: 2009 , Page(s): 1 - 6
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (231 KB) |  | HTML iconHTML  

    This paper presents the impact of large scale PV generation on Bangladesh power system oscillatory and static voltage stability. First, the eigenvalue of the system without and with PV based generator has been analyzed. Then system loading margin is studied without and with PV based generator. The influence of radiation, position, and penetration of PV based generator on system is considered for the system study. View full abstract»

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  • Energy cost calculations for a solar PV Home System

    Publication Year: 2009 , Page(s): 1 - 4
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (148 KB) |  | HTML iconHTML  

    Energy costing for a Solar Home System has been presented here considering the main cost components. It has been identified that the cost of solar PV panels, bank interest rate, cost of battery and its longevity plays the most important role in determining the energy cost. Average solar insolation is also taken into consideration and the results show that contribution of the storage battery towards the total cost of energy is significantly higher than that of the solar PV panel. View full abstract»

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  • Microcontroller based sinusoidal PWM inverter for photovoltaic application

    Publication Year: 2009 , Page(s): 1 - 4
    Cited by:  Papers (2)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (646 KB) |  | HTML iconHTML  

    This paper represents the microcontroller based sinusoidal PWM inverter for photovoltaic application. The advantage of this inverter is the use of a low cost microcontroller that has built in PWM modules. Microcontroller PIC 18F4431 is able to store the required commands to generate the necessary PWM waveforms. The required dead time has been implemented low cost. The application of this inverter is to be either for stand-alone or for grid connected from a direct supply of photovoltaic (PV) Cells. In this paper how SPWM signal is generated by microcontroller and what are the features of described microcontroller is reviewed. Subsequently hardware configuration of the microcontroller, algorithm, flowchart, gate driver and isolation system are discussed. Finally the experimental results are shown in this paper. View full abstract»

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  • Design & construction of microcontroller based maximum power point PWM charge controller for photovoltaic application

    Publication Year: 2009 , Page(s): 1 - 4
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1238 KB) |  | HTML iconHTML  

    Photovoltaic cell converts solar energy directly into electricity. This paper describes a design of a charge controller to get the maximum power by using the Pulse Width Modulation (PWM) technique. In this paper PWM is controlled by the PIC Microcontroller. The work of the paper is to charge a 12 volt battery by using a 50 watt solar panel with maximum power. In this paper how maximum power can be achieved from solar panel to charge the battery through PWM signal generated by microcontroller is discussed and the experiments by taking voltage and current's values in different time interval are shown. Finally the experimental results are illustrated in this paper. View full abstract»

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  • A Novel Technology utilizing Renewable energies to mitigate air pollution, global warming & climate change

    Publication Year: 2009 , Page(s): 1 - 3
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (290 KB) |  | HTML iconHTML  

    The Pneumatic Energy (Compressed air) shall be generated through a Novel device, by conversion of Renewable energies in the area - Hydro, Tidal, Waves, Wind, Solar & Salt gradient, utilizing atmospheric air as working fluid. The Pneumatic energy shall be then put into air turbines to produce mechanical energy which shall be converted into electrical energy by conventional method using generators. Further, to have smoke-free automobiles for mitigation of global warming, they shall be operated with pneumatic powered engines, utilizing the pneumatic energy which is eco friendly and also a substitute for fossil fuels. View full abstract»

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  • An economic analysis of Solar PV Micro-Utility in rural areas of Bangladesh

    Publication Year: 2009 , Page(s): 1 - 4
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (151 KB) |  | HTML iconHTML  

    Solar PV Micro-Utility is the concept of Solar PV extension where power rather than the solar electric systems are offered to the rural poor. In this system, one will never be the owner of the system, but one can use the Solar PV system by paying a daily tariff. Several rural markets have already been electrified through Solar PV under the concept of PV Micro-Utility by Centre for Mass Education in Science (CMES), a national NGO in Bangladesh. This paper deals with economic analysis (Net present value, Benefit cost ratio, Internal rate of return, Discounted pay back period) of Solar PV Micro-utility of Manikgang Bazaar which is located approximately 400 Km north to Dhaka, the capital of Bangladesh. View full abstract»

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  • Promoting ‘Off the Grid’ school: Application of RET to develop educational infrastructure in Bangladesh

    Publication Year: 2009 , Page(s): 1 - 4
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (358 KB) |  | HTML iconHTML  

    Primary school is the basic unit of our educational system. But in the remote areas, a huge shortage of primary school is observed. Many children of these areas are deprived from sufficient educational facilities. These remote areas are either under supplied or have no provision of electricity supply from the national grid. For this, most of the schools cannot provide the facilities that depend on electricity. As a result, the options of alternative energy sources come forward in those areas to generate power of their own. For power generation self sufficiently, `Off the Grid' is an effective idea in the present days. In remote areas, new technologies for off-grid rural electrification system promise environmentally benign access to electricity at a lower cost than conventional technologies. In this paper, the main focus is to set up a bridge between the renewable energy technologies (RET) and educational infrastructure of the remote areas in Bangladesh. View full abstract»

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  • Marketing and financing of solar home systems in Bangladesh: Assessment of success

    Publication Year: 2009 , Page(s): 1 - 4
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (257 KB) |  | HTML iconHTML  

    The commercial success of solar home systems in Bangladesh depends on the extent to which it can fulfill the needs of the end users, which will motivate users to invest money in SHS systems. This paper has explored the factors that can make SHS commercially viable in Bangladesh, and how far the SHS industry in the country has come to being commercially viable. The customers in Bangladesh have found that the SHS have satisfactory technical performance, an adequate financing infrastructure and good after sales support. The commercial distributors of SHS units also show increasing annual sales across Bangladesh, despite declining subsidies and rising prices of SHS. View full abstract»

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  • Sustainable construction and approaches for greener homes

    Publication Year: 2009 , Page(s): 1 - 4
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (150 KB) |  | HTML iconHTML  

    Building contributes almost 40 percent of CO2 emissions and is a major contributor to the Green House Gas Emissions (GHG). Climate change and its impacts need considerable attention from the building engineers/researchers so that building is designed taking into account environmental, socio-economic and cultural issues. The sustainable construction looks into the design and management of buildings, materials and building performance, energy and resource consumption through efficient energy use and environment friendly materials. The study is an attempt to address the issues of sustainable construction and what approaches needs to be implemented for a greener home for the developing countries based on existing local condition. View full abstract»

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  • Performance of a stationary vertical axis vane type rotor tested in a wind tunnel

    Publication Year: 2009 , Page(s): 1 - 4
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (201 KB) |  | HTML iconHTML  

    This paper reports the performance of an equally spaced vertical axis vane type rotor tested in a wind tunnel. The aerodynamic characteristics i.e. torque coefficient, drag coefficient etc. of a stationary vane type rotor have been studied in this research work by measuring the pressure distribution on the blade surfaces at various rotor angles. The experimental investigation was performed on four bladed vertical axis vane type rotor in a uniform flow jet produced by an open circuit wind tunnel. It has been observed that the static torque varies at different rotor angles. Total static torque coefficient at different rotor angles curve repeats from 0?? to 80??, 90?? to 170??, 180?? to 260?? and 270?? to 350?? angle of rotation. A quasi-steady approach was applied for the prediction of dynamic performance of the rotor using the static drag and torque coefficients. This method results in a fair agreement with the measured power coefficient. View full abstract»

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  • Wind energy — An innovative solution to global warming?

    Publication Year: 2009 , Page(s): 1 - 3
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (209 KB) |  | HTML iconHTML  

    Now a days global warming has become a threat to every individual. One of the main causes of global warming is carbon dioxide emissions. One source of carbon dioxide is the burning of fossil fuels to produce electricity from power plants. Burning of gasoline in vehicles and airplanes also contributes to large amounts of carbon dioxide being released into the atmosphere. The major sources of green house gases like carbon dioxide, nitrous oxide and methane all lead to global climate changes. To face this global threat an important factor is Sustainable Development, which does not focus solely on environmental issues but includes economic development, social development, and environmental protection for the near future. Hence different applications of renewable energies are the most important and promising solutions towards global warming. There is however more development yet to be done in different areas of these renewable energies in order to make them more commercialized, even in domestic market places, by reducing the cost of the different technologies. To date many renewable energy sources are available in the marketplace and this paper is focused on wind energy resources and its commercialization aspects worldwide. This paper will also focus on constraints against this renewable energy applications right up to the door-step of every individual. View full abstract»

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  • Solar passive cooling/heating of building at Bikaner in Rajasthan, India

    Publication Year: 2009 , Page(s): 1 - 4
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1218 KB) |  | HTML iconHTML  

    The buildings of Bikaner are reasonably comfortable indoors because of thermal damping by the massive roofs and walls. However, the average indoor air temperature (over 24 hours) is about the same as the average outdoor air temperature. In a light-weight building without any external glazing and without any ventilation, the average indoor air temperature is the same as the area weighted average of the sol-air temperature of external surfaces, which is bound to be higher than the average outdoor air temperature. It is an indication of the effectiveness of the natural cooling methods used at Bikaner that the indoor temperatures equal the outdoor air temperature. The indoor temperatures in Bikaner lie just at the edge of the comfortable range. In other climates with higher relative humidity it is possible that inspite of good building design comfortable indoor conditions cannot be ensured because the average outdoor temperature is too high. In such climates it is necessary to adopt measures to lower the average indoor temperature to a level below the outdoor. Specially designed mud walls are still poplar in the hamlets (Dhanies) of western Rajasthan to deflect the hot winds. These are some of the conventional methods of passive cooling, typical in hot and dry climatic condition. India has a very diversified climate heating of buildings in also required especially in upper latitudes and hilly areas and cooling of buildings is required in lower latitude and desert areas. Solar passive architecture provides proper orientation and design of fenestration i.e. doors and windows to take maximum advantage of sun and wind. For heating the aim is to admit the sun's energy as much as possible and to reduce he loss of heat in the nights. This is achieved by direct gain through windows, therm-wall, or solarium and other such means. The heat loss is minimized by the proper design of walls, by insulation of walls and roof, by night insulation on windows, by double glazing of window- etc. View full abstract»

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  • Study on the pressure drop in the plate heat exchanger channel

    Publication Year: 2009 , Page(s): 1 - 4
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (481 KB) |  | HTML iconHTML  

    In this paper presented pressure drop characteristics in one channel of plate heat exchanger by experimental method. Plate Heat Exchanger (PHE) applied in vacuum evaporator for product fresh water. PHE have become popular in chemical, power, food and refrigeration industries due to the efficient heat transfer performance, extremely compact design and flexibility of extend or modify to suit changed duty. The heat transfer part contains corrugated plates with 60 degree of chevron angle. The experiments carried out pressure profile according to mass flow rate at 15 measure points for investigate flow characteristics of PHE channel flow which highly turbulent even with low Reynolds number. In addition, numerical simulation was compared with experimental results and present more visible distribution of flow behavior in the test section. View full abstract»

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  • Reactivation of a silica gel moist air dehumidifier using solar heat

    Publication Year: 2009 , Page(s): 1 - 4
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (478 KB) |  | HTML iconHTML  

    Dry air is used in many manufacturing and chemical industries and plants, and in pneumatic control systems. Silica gel pellets, available in various sizes, are widely used as drying substance as it processes distinct advantages. For reuse in the drying process, it can be quite easily reactivated by heating. In this work a small silica gel drier, fabricated and used earlier by this author, has been used for reactivation. The reactivation process was carried out by passing heated air at about 70??C achieved by a flat-plate solar collector through the moisture-loaded silica gel bed. An analysis of the reactivation process of an adsorbent material has been given, and some useful equations have been included. Experiments were carried out for few days during sunny periods in the IUT campus. Calculated and experimental result are presented in graphical form and compared for different heating period, viz. 30 min, 60 min, 90 min and 120 min. The calculated and experimental results show reasonable agreement with each other. It is also found that higher time of heating results in more drying of the gel at an accelerated rate. Pressure drop through the gel bed has been calculated for a given air flow rate that can be used for selecting the supply air fan. Finally some recommendations for further work have been given. View full abstract»

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  • Concentrating Solar Power (CSP) and its prospect in Bangladesh

    Publication Year: 2009 , Page(s): 1 - 5
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (220 KB) |  | HTML iconHTML  

    Concentrating Solar Power (CSP) is a promising technology for power generation in which the solar radiation is concentrated to generate high temperature for producing steam in a solar thermal power plant. No fossil fuel is used in this technology; therefore no greenhouse gases are emitted. With an average annual Direct Normal Irradiance (DNI) of 2,000 kWh/m2 the area required to generate 100 MWe of electricity is about 2 km2. Bangladesh receives an average annual DNI of nearly 1,900 kWh/m2 which is sufficient to operate a CSP plant. By the year 2015 the capital cost of CSP plant will become $3,800/kWe. As there is no fuel cost in CSP, this can be an attractive choice to mitigate the power crisis of Bangladesh. In this paper the prospect of utilizing CSP in Bangladesh has been focused. View full abstract»

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  • Performance study of an indigenously built flat plate solar water heater

    Publication Year: 2009 , Page(s): 1 - 4
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (202 KB) |  | HTML iconHTML  

    A 60 liter capacity flat plate solar water heater has been designed and constructed with locally available material. The size is selected considering the daily requirement of a small family. In performance evaluation we have recorded water temperature of the solar water for consecutive hours during the mentioned sun shine period. During June-July period the maximum water temperature obtained was 71??C. Evening and morning water temperature were taken to estimate the heat loss during non sun shine hour. Amount of thermal energy capture from incoming available solar radiation and its thermal heat transfer to water was evaluated for the local environment. A chemical test was also carried out to study the corrosion and water contamination within the solar water heating system. The performance of thermo siphon, thermal insulation of water tank, collector radiation absorption and leakages of the collector were also being studied. Since it is an on going experimental work, design and modification to improve the device performance and cost reduction for the construction is still continuing. The performance of the solar water heater will be measured over a certain period of time to draw the final conclusion. View full abstract»

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  • Photovoltaic maximum power point tracking battery charge controller

    Publication Year: 2009 , Page(s): 1 - 5
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (495 KB) |  | HTML iconHTML  

    Photovoltaic generators exhibit nonlinear I-V characteristics that vary with solar insolation. This paper describes a technique for real time tracking of the maximum power point (MPPT) of a solar panel charging a battery. A step down switching regulator is used where the duty cycle is varied to attain the desired MPPT level. Performance of the MPPT is evaluated theoretically using ORCAD SPICE. A prototype of the MPPT is built using ATmega 32 microcontroller and tested to charges a 70Ah lead acid battery with a 40W solar panel. Both simulation and experimental results validates capability of the proposed technique to track the maximum power at different solar insolation. View full abstract»

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