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Abstract In this present research study a multi-generation energy system which is coupled with CO2 capture unit which is based on Rankine cycle, organic Rankine cycle, ejector cooling system and absorption chiller has been analyzed via... more
Abstract In this present research study a multi-generation energy system which is coupled with CO2 capture unit which is based on Rankine cycle, organic Rankine cycle, ejector cooling system and absorption chiller has been analyzed via energy, exergy, exergy-economic aspects by developing MATLAB, also to achieve the optimum operating condition genetic algorithm has been applied for system optimization. The objective of this study is to propose an optimized efficient integrated energy system to recycle the energy waste of a typical industrial factory. The optimization has been illustrated on a Pareto frontier to achieve the optimum scheme of the multi-generation system regarding technical and economic viewpoints. Results indicate the optimal condition of this system has occurred at 0.37 exergy efficiency with 0.03 $/s. Furthermore, by surging the mass flow rate of waste gases up to 70 kg/s, net power output augmented up to 7500 kW. Besides, hydrogen production and produced desalinated water rise up to 8.5 g/s and 16 kg/s, respectively.
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Double rotor wind turbines are studied for improving wind energy harvesting. The location, size and number of blades of the second rotor are important factors which affect performance of the double rotor wind turbines. These and other... more
Double rotor wind turbines are studied for improving wind energy harvesting. The location, size and number of blades of the second rotor are important factors which affect performance of the double rotor wind turbines. These and other blade parameters may influence the drag and output power characteristics of the wind turbine. In the present work, the drag forces acting on two double rotor wind turbine configurations are experimentally investigated using wind tunnel testing. The two configurations are cocurrent and counter current double rotor wind turbines. A single rotor wind turbine is used as a comparison reference to compare with the two double rotor wind turbine configurations. Models of the three horizontal axis wind turbines were produced using 3D printing technology and were tested in the wind tunnel while wind power augmentation was also evaluated. The experimental results revealed an increase in the value of drag coefficient when a second rotor is added. The increase on the drag coefficient depends on the configuration, the size and location of the second rotor. The drag coefficient for the counter current rotation double rotor is close to the single rotor wind turbine; however, an increase of about 25% on drag coefficient is observed for the case of cocurrent double rotor wind turbine.
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The PBL unit of fluid and electrical drive systems is taught in final semester of undergraduates in mechanical engineering department of the Australian College of Kuwait (ACK). The recent project on an automated punching machine is... more
The PBL unit of fluid and electrical drive systems is taught in final semester of undergraduates in mechanical engineering department of the Australian College of Kuwait (ACK). The recent project on an automated punching machine is discovered more appealing to both students and instructors in triggering new ideas and satisfaction end results. In this case study, the way this PBL unit is coordinated and facilitated is explained. Two examples of student works are presented. The aim is to expose the students to real world engineering problems but in a satisfying manner. Similar to real life problems for engineers, restrictions are applied for the students on costs, availability of ACK facilities, and application of automation tools. Students are directly engaged by using technical standards on punching heads and dies, standard tensile testing of plates, and so on. Arduino microprocessor programming, an open-source hardware and software electronic platform, and electro-pneumatic devices...
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A thermodynamic analysis based on first law of thermodynamics of organic Rankine cycle (ORC) was presented to find out effect of organic fluid selection on the cycle efficiency and power output.Different configurations of ORCs with and... more
A thermodynamic analysis based on first law of thermodynamics of organic Rankine cycle (ORC) was presented to find out effect of organic fluid selection on the cycle efficiency and power output.Different configurations of ORCs with and without Internal Heat Exchanger (IHE) were used. The criteria for choosing the optimum working fluid were discussed and many different organic fluids were compared in terms of thermal efficiency and power output. The results showed that higher efficiencies were obtained for ORCs with IHE configuration, and the organic fluid R123 had the most favorable performance for which the thermal efficiency of ORC was 14.2 and 13.28 with and without IHE, respectively. Moreover, the work output of ORC cycle was about 50 kJ/kg which was the highest when using R123 as an organic fluid.
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Solar energy; as one of renewable energy sources, is of high importance mainly for countries with high temperature and long sunshine duration. However, environmental conditions and system parameters affect the output of the solar panels... more
Solar energy; as one of renewable energy sources, is of high importance mainly for countries with high temperature and long sunshine duration. However, environmental conditions and system parameters affect the output of the solar panels in different geographical locations in any country. Solar energy stations available in different locations in Jordan have been investigated, using artificial neural network (ANN). Analysis of several inputs (variables) identified were employed to indicate their relative significance to the output such as latitude, altitude, sunshine duration (SSD) and global solar radiation (GSR). ANN shows proficiency in the prediction of the original experimental data for all the solar stations. In the simulation, the energy gain increases with the increase in the GSR which is one important environmental condition and the perfect fit (R value 0.9961) indicates that the network output is close to targets. It can be concluded that the provided ANN model predicts powe...
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System and environmental parameters affecting the output of the wind farm system at different stations in Jordan have been computationally investigated, using artificial neural network (ANN). For the several variables identified,... more
System and environmental parameters affecting the output of the wind farm system at different stations in Jordan have been computationally investigated, using artificial neural network (ANN). For the several variables identified, statistical analysis was employed to indicate their relative significance to the targeted output, with the aid of the Pearson’s correlation coefficients. ANN shows proficiency in the prediction of the original experimental data for all the stations and turbines. In the simulation, the energy gain increases with the increase in the system and environmental parameters. However, there appears to be a phenomenon of threshold value in the output parameter, which limits the impacts of change in the input parameters on the eventual response of the output. It can be deduced that there is a minimum energy gain value below which increase in any of the system/environmental parameters will not have positive impact on the energy output. Findings show that the turbine ch...
Used engine oil is one of the most environment pollutants that is produced in large quantities. Methods of recycling and reuse of the oil are important for sustainable environment. In this work, a new experimental method is proposed for... more
Used engine oil is one of the most environment pollutants that is produced in large quantities. Methods of recycling and reuse of the oil are important for sustainable environment. In this work, a new experimental method is proposed for producing diesel-like fuel from the waste engine oil. The study proposes new physical and chemical treatment methods to produce diesel-like fuel from the used engine oil. The produced oil is chemically analyzed to characterize the produced engine oil fuel for application in a diesel engine, to calculate the power produced, to measure the gaseous emissions and to compare with the standard diesel fuel. The diesel-like fuel properties are investigated including viscosity, flash point, pour point, energy content, and gaseous emissions. The diesel-like fuel proves to emit less gaseous pollutants such as NOx than the diesel fuel. The diesel-like fuel is tested in a diesel engine which provided the efficiency of 22.4%. The proposed experimental approach pro...
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Renewable Energy Hybrid System (REHS) is a system that utilizes two sources or more of renewable energy. As an advantage, it will assist in producing continuous sources of energy and utilizing one source in the absence of other source(s).... more
Renewable Energy Hybrid System (REHS) is a system that utilizes two sources or more of renewable energy. As an advantage, it will assist in producing continuous sources of energy and utilizing one source in the absence of other source(s). The aim of this research is to enhance the energy output of renewable energy system which is the wind turbine by incorporating solar panels. Other objective is to investigate the effect of solar panels distribution on the total power output of the new created hybrid system by investigating two cases. First, by using one large solar panel that is connected to the hybrid controller with the wind turbine. Second, by using smaller size solar panels that have an equivalent area to the panel used in the first case. Results showed that the power output of the wind turbine is improved when connected to the solar panel, and a continuous power output is achieved. One big solar panel has better effect in improving the power output than using smaller size sola...
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ABSTRACTMost of the available studies in literature focus on using photovoltaic systems to partially empower buildings. Solar energy can help in providing a certain amount of power to buildings. Full dependence on solar energy to provide... more
ABSTRACTMost of the available studies in literature focus on using photovoltaic systems to partially empower buildings. Solar energy can help in providing a certain amount of power to buildings. Full dependence on solar energy to provide daily demands to power of a building is not considered due to high cost. Thus in this research, the economic aspects of using a photovoltaic system to provide the full power for Kuwait residential buildings is investigated. The technical information for the solar system is assumed to have a full economical study; the technical information include information about load, panel array sizing, battery size, selection of controller and the selection of inverter. The economic analysis includes the estimation of payback period, return on investment (ROI), net present value (NPV), and cost of electricity consumption based on Ministry of Electricity and Water (MEW) tariffs in Kuwait. Weather conditions will be included in the selection of photovoltaic system components. It was fou...
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Artificial neural network modelling has been employed to investigate the effects of various environmental and machine factors on the energy gain from wind farm systems. Numerical comparison of artificial neural network and nonlinear... more
Artificial neural network modelling has been employed to investigate the effects of various environmental and machine factors on the energy gain from wind farm systems. Numerical comparison of artificial neural network and nonlinear regression from XLSTAT showed that ANN possessed better numerical accuracy in predicting multivariate data. Several artificial neural network models are developed and tested with several structures to obtain the best prediction performance in energy gain from different wind farms in Jordan. The best performing artificial neural network model was used to predict the energy gain from wind farm based on changes in annual wind speed, turbine rotor diameter and turbine power. As a result of 20% increase in turbine power, 14.4%–31% energy gains were recorded across different wind farms. The proposed artificial neural network model was also a good predictor for energy cost resulting from specific wind farm design.
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ABSTRACTThe performance of a traditional solar still system can be improved by modifying the desalination processes involved. In this work, a simple experimental model of a one-sided solar stiller is build and tested. The solar still... more
ABSTRACTThe performance of a traditional solar still system can be improved by modifying the desalination processes involved. In this work, a simple experimental model of a one-sided solar stiller is build and tested. The solar still system is modified with a solar cooling fan and a preheating solar collector. The fan is used to increase the cooling rate of external surfaces of the glass cover to increase the condensation rate of vapors and thus increase the amount of distilled water. The fan is powered by a small PVC (photovoltaic cell). In addition, the preheating solar collector uses the hydraulic oil as the working fluid for indirect heating of the feed sea water within the still device. A series of measurements consist of basin and ambient temperatures and rate of production of distillate are carried out in the winter in the State of Kuwait during November 2015 and then the results are analyzed and compared with some previously published data. It is observed that the improved solar still system produ...
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The data on the static friction coefficient (µ) resulting between a surface and a friction block covered with shredded rubber produced from used commercial tires at varying granule sizes are presented. The tests are done using different... more
The data on the static friction coefficient (µ) resulting between a surface and a friction block covered with shredded rubber produced from used commercial tires at varying granule sizes are presented. The tests are done using different types of plates such as, glass, Poly Vinyl Chloride (PVC) plastics, wood, concrete, marble, ceramic and sand paper to represent rough and smooth surfaces in contact with shredded rubber granule of sizes 1.18 mm, 0.6 mm, 0.425 mm, 0.3 mm, and 0.15 mm. The coefficient of static friction is calculated using Coulomb׳s Law of dry friction and the data are compared based on the granule sizes variability. The data are represented in tables and figures. The data are in an almost uniform trend among the surfaces starting with a lower coefficient of friction for 1.18 mm to 0.6 mm, reached the highest at 0.425 mm and drops eventually as soon as the granules are finer.
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In countries where wind energy is less feasible, an energy harvesting device such as highway wind turbines can still be used for applications where less power is needed. This energy can be harveste...
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The rotor design procedure of wind turbines starts first with adopting a rated output power and a rated wind speed. There is lack of modelling to determine an optimized rated wind speed and no evidences are observed to suggest the best... more
The rotor design procedure of wind turbines starts first with adopting a rated output power and a rated wind speed. There is lack of modelling to determine an optimized rated wind speed and no evidences are observed to suggest the best rated wind speed to produce maximum output power annually. For example in the market of small wind turbines, it is frequently observed that the rated wind speed is taken from small value of 8 m/s to large value of 20 m/s. To examine overall performance of these wind turbines, it is required to develop mathematical models to relate the annual power production of the wind turbines to the given rated wind speeds. By examining power curves of some small European wind turbines from 100 to 900 Watt with constant speed generators, a simplified mathematical model for power curves is introduced and combined with Weibull distribution of wind speeds. Results of the model based on a capacity factor are presented versus the rated wind speed using wind characteristics of an optional region. It is observed that between the cut-in and cut-out wind speeds, there is an optimum rated wind speed above which the annual output power production of the wind turbine remains unchanged.
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The transportation sector faces magnificent challenges, such as climate change, petroleum unstable prices and energy security which demand a technological innovation to reduce overall pollution. The need to explore alternative... more
The transportation sector faces magnificent challenges, such as climate change, petroleum unstable prices and energy security which demand a technological innovation to reduce overall pollution. The need to explore alternative opportunities rather than regular conventional vehicles is highly recommended. The Green Line Groups claims that Air Powered Vehicles (APVs) would be an environmentally friendly solution of the future. This book will discuss APVs cyclic process, the performance analysis and efficiency of APVs components, fuel economy and energy consumption in terms of driving range, environmental impact and the strategies for Improving Air Powered Vehicles. a full design based on theoretical mechanical engineering equations is presented. using ANSYS software. and steps to build and choose components is also part of this book. it ends with some analysis of how to improve the current APVs.
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The current work is to provide an overview of the agricultural wastes– biomass wastes, such as corn stalks, straw, nutshells, and forestry residues applications in different industries to sustain the environment. Literature showed that... more
The current work is to provide an overview of the agricultural wastes– biomass wastes, such as corn stalks, straw, nutshells, and forestry residues applications in different industries to sustain the environment. Literature showed that millions-Ton update estimates potential supplies of agricultural crop residues and wastes. The largest quantities of agricultural residues and wastes are from the major commodity crops. In the past years (on yearly average) there was approximately a million ton of primary dry crop residues that can be utilized, and sometimes make a profit by collecting them at farm gate with feedstock prices of 60 and 50 US Dollars per dry ton. The literature showed also many applications of biomass wastes which are considered as renewable and safe source for many industries such as manufacturing cementitious bricks by direct use or by direct incineration to produce energy, and by using the ash results from the combustion in the concrete matrix, producing energy and p...
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In high temperature regions a need for less expensive and efficient way of cooling is needed. making use of open water like sea to cool large ares of building is introduced with brief economical analysis.district cooling is a mechanism to... more
In high temperature regions a need for less expensive and efficient way of cooling is needed. making use of open water like sea to cool large ares of building is introduced with brief economical analysis.district cooling is a mechanism to solve such an issue. District Cooling is the centralized air conditioning method that uses chilled water transferred through underground pipelines to buildings to be used as a mean of cooling the indoor air within a certain district (certain block within a city).