نتایج جستجو برای: productivity of energy carriers

تعداد نتایج: 21247280  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده مهندسی برق و کامپیوتر 1391

many mobile and off-grid devices include electronics and other electrical consumers like servo drives, which need a quite low supply power. since the price for photovoltaic modules drops continuously, photovoltaic power supply is interesting in more and more applications. in solar powered systems, a battery is needed to store energy for the night and cloudy periods. the power electronics of suc...

آذربایجانی, کریم, شاکری, ابوذر, شریفی, علیمراد, کاظمی, ایرج,

Industrial energy demand analysis has always been one of the leading fields of research in economics. This issue is more critical in the case of developing countries especially those with transition experiences. In this paper, third generation of dynamic factor demand models for the Iranian manufacturing industries is estimated to analyze the speed of adjustment in factor demands. Data which is...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه مواد و انرژی - پژوهشکده سرامیک 1392

thermal barrier coatings (tbcs) are used to provide thermal insulation to the hot section components of gas turbines in order to enhance the operating temperature and turbine efficiency. hot corrosion and thermal shocks are the main destructive factors in tbcs which comes as a result of oxygen and molten salt diffusion into the coating. in this thesis atmospheric plasma spraying was used to dep...

Journal: :مهندسی بیوسیستم ایران 0
محمدعلی رجایی فر کارشناس ارشد، گروه مهندسی مکانیک ماشین های کشاورزی، دانشگاه تهران، ایران اسداله اکرم دانشیار مهندسی مکانیک ماشین های کشاورزی، دانشگاه تهران، ایران برات قبادیان دانشیار مهندسی مکانیک ماشین های کشاورزی دانشگاه تربیت مدرس، ایران شاهین رفیعی استاد مهندسی مکانیک ماشین های کشاورزی دانشگاه تهران، ایران رضا عبدی دانشیار، گروه مهندسی بیوسیستم، دانشکدۀ کشاورزی، دانشگاه تبریز، ایران

the aims of this study were to assess the energy and economic flows of biodiesel production from olive pomace oil using transesterification method with ultrasound waves. for this purpose biodiesel production from this feedstock were examined through a life-cycle process with considering five main stages of agricultural production, transportation, olive oil extraction, pomace oil extraction and ...

Journal: :international journal of maritime technology 0
dhara shah cept university, kasturbhai lalbhai campus, university road, navrangpura, ahmedabad viral shah global marine engineering consultancy, ahmedabad mehul patel patel global marine engineering consultancy, ahmedabad

berthing force is a critical dynamic lateral force in the design of berthing structures, having equal relevance when compared to seismic forces. besides, the construction cost of berthing structures is very high which can be optimized by calculating precise design berthing energy on fender and selecting optimum fender system. in the present study, design berthing energy of bulk carriers having ...

2002
Pedro L Marin

The paper specifies and estimates a production function for the airline industry, identifying firms' network characteristics and efficiency as the main determinants of their productivity. The application of this analysis to the European market shows that productivity differences among flag carriers could explain the governments' different views about deregulation at the beginning of the eightie...

ابراهیم صادقی, ,

  Energy eigenvalues of carriers have been calculated for rectangular quantum wires with finite barrier potentials using the effective mass approximation. and systems are considered, and a spatially dependent effective mass is included in effective mass approximation. Calculated values are compared with those obtained earlier by other methods. Experimental values of the energy shift of wires ar...

Journal: :پژوهش های زراعی ایران 0
سید مسعود ضیائی فرزاد حسین پناهی جعفر ولی زاده سید ابوالقاسم برآبادی

comparison of energy productivity of different crops can be used as an effective tool to prioritize crops planting in each area. this study was conducted in order to compare of wheat and barley farms of sistan and blochestan province in relation of various aspects of energy consumption at 2009. 100 wheat and 100 barley fields were selected randomly from zahedan, zabol, saravan, khash, iranshahr...

With increasing population, demand for chicken meat has increased and resource constraints have led to increased production with an emphasis on improving the productivity of inputs and energy indices, so studying energy consumption in broiler production is important. One of the important issue in broiler industry is energy consumption. In this study, energy consumption flow and amount of energy...

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