List of Articles mojtaba jamiati

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  1 - Optimal placement of DG in an unbalanced network with two separate objectives using a new algorithm
  mojtaba jamiati
  In this paper, distributed generation (DG) resources are localized in an unbalanced network with two different objective functions using a new algorithm. For this purpose, cost and parametric objective functions will be formulated for this problem. A new technique has b More

  In this paper, distributed generation (DG) resources are localized in an unbalanced network with two different objective functions using a new algorithm. For this purpose, cost and parametric objective functions will be formulated for this problem. A new technique has been proposed to solve the problem of unbalanced load distribution. Group Search Engine Optimization (GSO) algorithm is one of the new particle intelligence techniques that in this paper, this algorithm has been improved and the results have been analyzed. The simulations will be performed on two real sample networks in northwestern Iran and the IEEE standard. Each target function will be tested on one of the networks. For each network, two placement scenarios are proposed: DG resource counting and determination of the number of DG units. In the case study process, the results of the proposed improved GSO algorithm are compared with the results of simple GSO algorithms and particle swarm optimization (PSO). Manuscript profile
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  2 - Effects of rotational flow on energy efficiency of a novel parabolic through solar collector equipped with elliptical ribbed absorber tube filled with non-Newtonian two-phase nanofluid
  mojtaba jamiati
  The main purpose of this study is to investigate the effect of using an elliptical absorber system with helical ribbed tube on the energy efficiency of linear parabolic collectors. For this purpose, energy efficiency has been measured and presented for different modes, More

  The main purpose of this study is to investigate the effect of using an elliptical absorber system with helical ribbed tube on the energy efficiency of linear parabolic collectors. For this purpose, energy efficiency has been measured and presented for different modes, and finally different optimal models are introduced in terms of having the highest energy efficiency, and finally the best model is determined. Based on the obtained results, the highest energy efficiency in different Reynolds is related to the new collector and single-phase model. According to the results of this dissertation, the use of grooved pipe has an effect on increasing the efficiency of the collector. As the number of grooves increases from 1 to 3, the collector efficiency increases. It was also found that the collector efficiency increases with increasing step and slope amplitude. by increasing the groove angle from 10 ° to 50 °, the collector efficiency increases and the maximum value of η is obtained at ° ξ = 60. However, by increasing the groove angle from 50 ° to 60 °, the collector efficiency decreases. Manuscript profile
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  3 - The effects of using two compound twisted tapes to enhance the performance of a parabolic trough solar collector
  mojtaba jamiati Hossein Pourmohamadian
  In this study, the effect of spinning tape on the thermal hydraulic performance of water-hybrid water-hybrid carbon nanotubes-aluminum oxide inside a linear parabolic solar collector has been investigated numerically. The study is in turbulent flow regime and in order t More

  In this study, the effect of spinning tape on the thermal hydraulic performance of water-hybrid water-hybrid carbon nanotubes-aluminum oxide inside a linear parabolic solar collector has been investigated numerically. The study is in turbulent flow regime and in order to model it, the k epsilon turbulence model has been used. In order to solve the survival equations, the finite volume method and the SIMPLE C algorithm have been used. The study was performed to investigate the hydraulic and thermal performance of the parabolic solar collector equipped with 1, 2 and 3 twisted strips. Also, the results obtained from the simulation of a linear parabolic solar collector with a radiant strip are compared with when the solar collector is simple (without a radiant strip). Different concentrations of nanoparticles (1 to 3% by volume) were used for Reynolds numbers from 3000 to 18000. The obtained results are presented in the form of Nusselt dimensionless number diagrams, pressure drop and thermal hydraulic performance evaluation criteria(PEC). Manuscript profile
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  4 - Thermal and hydraulic analysis of a novel p double fluid parabolic through solar collector equipped with corrugated tube and insulator roof
  mojtaba jamiati
  The present study investigates a double-fluid volumetric based parabolic trough solar receiver. The control volume approach is used to solve the system of classical single phase governing equations by using the finite volume method. The standard k–ε turbul More

  The present study investigates a double-fluid volumetric based parabolic trough solar receiver. The control volume approach is used to solve the system of classical single phase governing equations by using the finite volume method. The standard k–ε turbulence model with enhanced wall function is selected. According to obtained results, the value of efficiency of Conventional-Parabolic-Through-Solar-Collectors (CPTSCs) and Novel-Parabolic-Through-Solar-Collectors (NPTSCs) reduces by increasing of inlet temperature of base fluid and therefore, there is an optimum inlet temperature for all configurations and it is equal to 40°C. Manuscript profile
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  5 - performance enhancement of a two-fluid corrugated torsional heat exchanger containing hybrid nanofluids
  mojtaba jamiati Hossein Pourmohamadian
  In this research, the effect of the corrugate inside a two-fluid torsional heat exchanger containing a hybrid water-copper-carbon nanotube nanofluid is investigated numerically using computational fluid dynamics. The geometry of the torsion heat exchanger is prepared us More

  In this research, the effect of the corrugate inside a two-fluid torsional heat exchanger containing a hybrid water-copper-carbon nanotube nanofluid is investigated numerically using computational fluid dynamics. The geometry of the torsion heat exchanger is prepared using Design Modler software. Also, in order to analyze the fluids, the finite volume method and Ensys Fluent software are used. The hybrid nanofluid stream is in the turbulent and the K Omega turbulence model is used to model it. The geometry of the simple torsional heat exchanger is compared with the torsional heat exchanger with the corrugate and the output results are presented in the form of graphs of mean Nusselt number, pressure drop and PEC index. The study is performed for Reynolds numbers 6000 to 24000, volume fraction of 1 to 5% and three different heights of 1, 2 and 3 mm from the congress. The results obtained from numerical simulation show that the use of water-copper-carbon nanotube hybrid nanofluid causes higher thermal performance than water-based fluid. Manuscript profile
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  6 - A New Reliability Assessment Approach for Operation Unified Energy System
  mojtaba jamiati
  In this paper, then introduction of integrated energy systems, with regard to reliability indices as statically due to the development of societies, the growth of energy consumption and optimal and simultaneous of energy use have been studied. Energy systems are regular More

  In this paper, then introduction of integrated energy systems, with regard to reliability indices as statically due to the development of societies, the growth of energy consumption and optimal and simultaneous of energy use have been studied. Energy systems are regularly subject to major disruptions affecting economic activities, operation of infrastructure and the society as a whole. The reliability evaluation of distribution network is an important part of power system. There are only few reliability assessment approach considered the impact of multi-faults. It’s necessary to have a method that can ensure both accuracy and efficiency. As well as, using with Genetic Algorithm (GA), the best state installed elements at different times in the form of statically model and the exact amount of input energies according to the value of electrical and thermal energies is determined. And using various efficiencies and prices of energy carrier in different hours in a year is considered. Finally, with extension period time of operation system in a prototype system is evaluated. Manuscript profile