Journal of Mechanical Engineering and Vibration: 4 (3)

Open Access Article

1 - Approach for scheduling to use electrical vehicle in micro-grid to decrease cost by using HBB-BC algorithm
Mohamad Tolouaskari

Provide a comprehensive plan for the electric vehicles in a micro-grid with regard to network limitations and vehicles as well as economic goals of the utmost importance. In this paper, the Hybrid Big Bang to Big Crunch algorithm has been used to provide scheduling for More

Provide a comprehensive plan for the electric vehicles in a micro-grid with regard to network limitations and vehicles as well as economic goals of the utmost importance. In this paper, the Hybrid Big Bang to Big Crunch algorithm has been used to provide scheduling for electric vehicle presence in the network to reduce costs. In order to verify the proposed method, studies in a 24 hour period on a distribution system and in the presence of electric vehicles have been done with real movement patterns. Effectiveness and usefulness of the proposed technique scheduling resources in a 24 hour period on a micro-grid sample tested. The results show that the proposed method of charging / discharging EV can reduce operating costs. Manuscript profile

Open Access Article

2 - Adding Fault Tolerance to MaSE Methodology for Multi-Agent Systems
Mohammad Hossein Davarpour

Many software applications today are designed based on multi-agent concept. These applications which need to work non-stop and continuos for a long period are prone to errors. Therefore, they are required to be fault tolerant as much as possible. Most of fault-tolerant More

Many software applications today are designed based on multi-agent concept. These applications which need to work non-stop and continuos for a long period are prone to errors. Therefore, they are required to be fault tolerant as much as possible. Most of fault-tolerant methods provided for multi-agent systems are based on replicating the number of agents which leads to more complexity in these systems. In this paper we used task replication along with increasing numbers of agents in MaSE methodology to have a reliable architecture with high fault tolerante capability for multi-agent systems. Manuscript profile

Open Access Article

3 - The effect of oscillating flows on aerodynamic of two airfoils in tandem
Ali Heydari یزدان پیرحیاتی

In this study, two-dimensional oscillating flow around two airfoils in tandem is numerically simulated. With assuming unsteady, incompressible and viscous flow, the effect of oscillating amplitude and frequency on aerodynamic characteristics at different angle of attack More

In this study, two-dimensional oscillating flow around two airfoils in tandem is numerically simulated. With assuming unsteady, incompressible and viscous flow, the effect of oscillating amplitude and frequency on aerodynamic characteristics at different angle of attack is investigated. The Reynolds number is selected 11600 for SD7003 airfoil model and the distance between two airfoils equals to one chord. After mesh and time independency study, the results validation is done. The purpose of this work is to reach to the flight stability conditions in gusty and oscillating flows for biplane Micro Air Vehicles. To do this, the effect of amplitude and frequency of oscillating flow and the effect of interaction between two airfoils at different angles of attack must be investigated. The results show that increasing the frequency of inlet flow oscillation leads to reduction in lift and enhancement in drag coefficient in leading airfoil, but for trailing one, both the lift and drag coefficient will be increased. Manuscript profile

Open Access Article

4 - Study of the orientation of the building and the walls are made of solar water heater performance using software RETSCREEN (case study: Semnan)
sajjad zahirnezhad nader rahbar

Renewable energy such as solar energy in the world of particular interest to planners and technical intellectuals, political and economic located. Iran also due to the special geographical position in the exploitation of this type of energy has great potential. But a lo More

Renewable energy such as solar energy in the world of particular interest to planners and technical intellectuals, political and economic located. Iran also due to the special geographical position in the exploitation of this type of energy has great potential. But a lot of fossil energy resources, cheap energy in the country and also the high cost of new technology for the initial investment, a bulwark against the development of these technologies is emerging. In this paper, considering the geographical conditions in Semnan, with a floor of an office building located in the area check Azad University of Semnan, by software Carrier thermal loads in various positions, including for the different geographical position and for two types of wall building materials were calculated and an optimum of them were selected. Then RETSCREEN Software evaluated by technical, economic, environmental and analyzed. Based on the results of the optimal geographical and wall materials, the savings in natural gas 2332 m3 / year and the reduction of emissions 2.1 Ton / year Co2 is. Also, consider two scenarios internal rate and rate of natural gas to the amount of the initial investment plan of 138312550 Rial and 4618 $, the profitability of 4.2% and 23.5% and payback period of 19.9 and 6.4 years, respectively. Manuscript profile

Open Access Article

5 - Study and simulation effective parameters on combustion and pollutant formation in diesel engines
بهادر شعبانی Hadi Kargar Sharifabad

In this study, CFD modeling combustion engine software is used FIRE to optimize its performance. A three-dimensional model of the processes that formed in the cylinder made of air-fuel mixture, injection and combustion. The three-dimensional model, all chemical species, More

In this study, CFD modeling combustion engine software is used FIRE to optimize its performance. A three-dimensional model of the processes that formed in the cylinder made of air-fuel mixture, injection and combustion. The three-dimensional model, all chemical species, the density of air and fuel injection nozzles with full specification is intended to be Properties precise mixing of air and fuel, ignition, spray penetration, and penetration premixed combustion at different times and in accordance with The piston is achieved. Select the model for optimal fuel injection (injection management, Injector hole number, time of injection and spray angle) to achieve the best fuel economy and lowest emissions are used. Manuscript profile

Open Access Article

6 - Numerical and Annalytical Review on earth to air heat exchanger and Exergoeconomic Analysis
Saeed Asadi Ahad Abedini

In recent years, especially the last three decades, many studies have been done on earth to air heat exchangers or air underground pipes worldwide by researchers and professors.In this article we have tried to work with the most important markets in the past three analy More

In recent years, especially the last three decades, many studies have been done on earth to air heat exchangers or air underground pipes worldwide by researchers and professors.In this article we have tried to work with the most important markets in the past three analytical, numerical and exergoeconomic and offering them all at once and researchers interested in the subject or those who want to be familiar with the exchangers. Appropriate references to specialized and more complete study, to be collected. Research in this field of activity and a change in attitude on energy consumption and consequently reduce pollutants, as well as saving the economy Manuscript profile

Open Access Article

7 - Experimental investigation on thermophysical properties and convective heat transfer of Mg(OH)2-water under turbulent flow
Kourosh Hasanzade Mostafa Sefidgar

The aim of the present study is to investigate the thermal conductivity, dynamic viscosity, and convective heat transfer of Mg(OH)2-water nanofluid inside a circular tube under turbulent flow. The experiments have been carried in solid volume fractions of 0.0625, 0.125, More

The aim of the present study is to investigate the thermal conductivity, dynamic viscosity, and convective heat transfer of Mg(OH)2-water nanofluid inside a circular tube under turbulent flow. The experiments have been carried in solid volume fractions of 0.0625, 0.125, 0.25, 0.5, and 1%. The results indicated that adding nanoparticles to the base fluid result in noticeable increase in heat transfer rate. Moreover, the results showed that the thermal conductivity is increased while the temperature and solid volume fraction increased. Manuscript profile

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