Journal of Mechanical Engineering and Vibration: 1 (1)

Open Access Article

1 - Construction and Experimental Investigation of heat pipe and water cooling application to improve the efficiency of solar desalination
Hadi Kargar Sharifabad مهدی آریافر

Healthy and fresh water supply is one of the fundamental issues in different regions of the world, particularly in remote areas is dry. There are several methods for desalination of brackish waters, of which solar distillation devices can be the perfect solution for spa More

Healthy and fresh water supply is one of the fundamental issues in different regions of the world, particularly in remote areas is dry. There are several methods for desalination of brackish waters, of which solar distillation devices can be the perfect solution for sparsely populated areas that are of sufficient intensity solar radiation. In this study, we have tried to express the necessity of providing safe drinking water, the fundamentals of performance of solar desalination dealt with the resources available. In the present study the effect of water cooling with two modes: Desalination with heat pipe and manifold (semi-active) and desalination to cooling water and heat Vlvlhhay manifold (active mode) are tested daily production was investigated. Tests in August (September) in geographical coordinates(N:35°34′,E:53°22′)is conducted. Based on the results observed The maximum rate of production of fresh water in active mode 0.43(kg / m2) per hour. As well as the daily yield semi-active mode from 1.87 (kg / m2.day) daily 2.085(kg / m2) reached in active mode. Manuscript profile

Open Access Article

2 - Literature Review carried out in the field of solar Air heater
Ali Heydari mikaeel Forati

To reduce energy sources, efforts are underway to optimize thermal processes around the world. Solar energy as an important source of renewable energy on Earth, with simple technology cause reduction in air pollution and saving the environment with less fossil fuels con More

To reduce energy sources, efforts are underway to optimize thermal processes around the world. Solar energy as an important source of renewable energy on Earth, with simple technology cause reduction in air pollution and saving the environment with less fossil fuels consumption for the future. One application of the solar energy is solar air heaters which different design is done for different application. To ensure the performance of energy systems, analysis of first and second laws of thermodynamics can be more useful to analyze processes undertaken within the system. Exergy is considered as a key concept and it is a fundamental concept of accessible energy. Solar air heaters can be based on its performance cycle was divided into two categories: active and passive. In passive systems mainly based on the difference in specific gravity of air, naturally flow of warm and cold air is formed. But in activated systems a forced convective air flow is derived with external component like fan. Manuscript profile

Open Access Article

3 - Numerical and Experimental Analysis of Coil’s Number of Rounds and Voltage in Electromagnetic Sheet Forming of Aluminum Alloy 1050
Sajjad Nadian Bersiani Ahmad Keshavarzi امین کلاهدوز

Scientists replace the old methods with the new ones as the science develops. Today, automobile makers use thin sheets in order to lessen the weight and forming these sheets needs new methods. Electromagnetic forming is a way with which very thin sheets are made. A magn More

Scientists replace the old methods with the new ones as the science develops. Today, automobile makers use thin sheets in order to lessen the weight and forming these sheets needs new methods. Electromagnetic forming is a way with which very thin sheets are made. A magnetic field occurs in the Coils that leads the piece of work to its form like piston but without having effect and forms it when forming with Electronic evacuation. This process happens in less than a micro-second and increases the produced work pieces paying attention to the Coils which are the connection between the work piece and the engine, the amount of Coils in voltage in Electromagnetic forming is studied in digital and experimental ways in this study. For experimental examinations, Electromagnetic Coils are made and tested with Electromagnetic machines with 3 KJ power. In order to do digital experiments Abaqus and J-Mag softwares are used that the digital results have corresponded. The results shown that the area of the Coils should be the same with the work piece and for forming big areas of sheets, forming should be done in several levels with small Coils. Also, in order to increase the strength of Coils during the forming, the should be put in FK20 liquids. Manuscript profile

Open Access Article

4 - Experimental investigation on the effect of resistance projection welding parameters on weld joint torque strength of nut to sheet
Nasrollah Bani mostafa Arab Amir Alinaghizadeh Ali Dehghani

Nowadays welding is the most important and the most common joining processfor Metals (and sometimes other metals). Among the existing methods for welding, ressistance welding uses heat and pressure simultaneously, In this thesis, effect of the process parameters on tors More

Nowadays welding is the most important and the most common joining processfor Metals (and sometimes other metals). Among the existing methods for welding, ressistance welding uses heat and pressure simultaneously, In this thesis, effect of the process parameters on torsional strength of resistance projection welds in sheet metal and nut with different thickness has been investigated. Welding time, welding current and electrode force are the most important factors affecting the quality of a the weld. The Minitab16 software and response surface method have been used to conduct experiments to find the effect of the above parametrs on torsional strength. Manuscript profile

Open Access Article

5 - Parameters change effect of cutting tool diameter, depth of cut and feed rate in the process of turbine blade 4 axis milling on the roughness and surface texture
Amir Alinaghizadeh Behrouz Norouzi Ali Farahmandi

Always in the production of turbine blades tried use less of secondary operations. Such as for increasing the quality of surface finishing that reduces the level of geometric accuracy. Accordingly in this paper, improvement of roughness and surface texture turbine blade More

Always in the production of turbine blades tried use less of secondary operations. Such as for increasing the quality of surface finishing that reduces the level of geometric accuracy. Accordingly in this paper, improvement of roughness and surface texture turbine blade directly with the optimization of machining parameters is been studied. Variable parameters of this research include tool diameter, depth of cut and feed rate. Experimental work by using a four-axis CNC milling machine was done on turbine blade aluminum. Experimental work by using four-axis CNC milling machine and the turbine blade was aluminum. Design of experimental was full factorial and All permutations of variable parameters been implemented. The surface roughness of machined areas by using surface roughness tester and the texture was examined using a stereo microscope. By using roughness tester, surface roughness of machined areas was measured. Form of surface texture was examined by a stereo microscope. Finally, by comparing data the best mode was introduced. Manuscript profile

Open Access Article

6 - Effectiveness Evaluation of Trombe Wall for Optimum Pattern of Building Heating System at Shiraz
سیدحسین هاشمی آرش نجفی سیدمحسن حسینی

Solar energy is a valuable and available renewable energy and its charge of technology has not great. Fossil fuels consumption grows in building heating systems and it is better to manage it with practical new engineering systems similar Trombe wall that can be reduced More

Solar energy is a valuable and available renewable energy and its charge of technology has not great. Fossil fuels consumption grows in building heating systems and it is better to manage it with practical new engineering systems similar Trombe wall that can be reduced energy consumption at winter. A major component used in Trombe wall technology, thermal storage system materials and glass and Despite the heat transfer patterns in Trmb wall system will occur. Glass is ideal for this system, should have unique features such as high strength and high thermal stability. However wall storage used to store solar thermal energy should be the maximum.. In this research, effectiveness evaluation of this system at Shiraz is studied. Results show this technology is advantageous and successful for Shiraz and offers the optimum energy system pattern. Manuscript profile

Open Access Article

7 - Size- dependent static displacement analysis of nanotube under electrostatic force with different boundary conditions
abbas zandi baghche maryam سید علی موسوی

In present study, size- dependent static displacement analysis of nanotube under electrostatic force with considering the surface effects and different boundary conditions is investigated. The results of this analysis are obtained for four different boundary conditions, More

In present study, size- dependent static displacement analysis of nanotube under electrostatic force with considering the surface effects and different boundary conditions is investigated. The results of this analysis are obtained for four different boundary conditions, namely pinned-pinned, fixed- fixed, fixed- pinned and fixed- free. Also, the nanotube is subjected to magnetic field, electrostatic actuation, mechanical and thermal force. In the investigation, the governing equation of motion are achieved using the Eringen's theory and this equation is calculated by using the weighted residual method. Also, velocity of fluid, length scale parameter, magnetic field, electrostatically voltage, effect of surface layer and different boundary conditions on the static displacements has been studied. Finally, the validity of the results by comparing them with the results of the numerical methods in previous research is investigated, in which there is very good agreement between the results of the present work and previous studies. It is obvious that the structural stiffness is increased with increases in the effect of surface layer and the static displacements increase with the increases of the velocity of fluid. In addition, it is shown that the stiffness of nanotube and the dimensionless static displacements, respectively, is decreased and increased with increases in the length scale parameter. Manuscript profile

Open Access Article

8 - Optimization of electromagnetic damper and suspension system of vehicle using bee’s algorithm
saeed yaghoubi علی رضا اطمینانی اصفهانی افشین قنبرزاده

In this study, electromagnetic damper using the model of one-fourth vehicle with two degrees of freedom, and the model of one-half with four degrees of freedom, and the effects of improving the function of suspension system have been investigated. Using the bee’s More

In this study, electromagnetic damper using the model of one-fourth vehicle with two degrees of freedom, and the model of one-half with four degrees of freedom, and the effects of improving the function of suspension system have been investigated. Using the bee’s optimization algorithm two phases, the simulated model, then, has been optimized. In the first phase, the constants of electro-magnetic damper have been optimized, and the parameters of suspension system have been assumed fixed. In the second phase, the parameters of suspension system have also been optimized beside the constants of electro-magnetic damper. In both phases, the size of optimized parameters using complex input including ten sine inputs with different amplitude and one step input have been earned, and eventually the size of Integral of Absolute Error according to different inputs has been calculated. In order to determine the final function in the optimization, IAE has been used, which has its aim in minimizing the space below the diagram (vehicle movement). The results indicate that the size of the final fuction is lower in comparison with the one-fourth model. The size of final function is lower in the second way of optimization; for instance, due to exetring sine input with the amplitude of 5, the size of this function for the one-fourth model and the one-half model was 0.293 and 0.283 for the first model; and 0.261 and 0.255 for the second one respectively. Manuscript profile

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