NTU Journal of Engineering and Technology

The objective of this paper is to obtain themaximum output power which deliveredfrom solar arrayand to improve the efficiency of the solar PV system according to the weather conditionsspecially the effect of solar radiation which fell on this array. The optimization in the solar system efficiency by MPPT is performed using the gray wolf optimization method by applying the proposed algorithm in order to maximize the output power. This means that the gray wolf technologies worked toincrease the power received from the solar panels in order to increase the efficiency.

The maximumoutput power can be obtainedfromsun energy tosupply grid tie system.The highest output powerthat leads to an improvementin the efficiency of the solar system related to the weather conditionswhen the panel exposedsolar radiationuniformand changed.In this paper acomparison study ofdifferent optimizationmethods including P&O ,PSO and GWO. This study obserive the bestoptimizationmethodsgivingthe highst power . This means that the greyoptimizationstechnologies lead to increasethe power received from the PVthat’s ledtoincrease the efficiency.

Solar energy is the most important source of the renewable energies that turn light or radiation into electrical power.In Iraq, solar stations are now being installed in houses, farms and small markets.In this paper, the design and sizingofa solar PV system intolaboratoybuilding of theTechnical college of Engineering/Mosulto cover its electrical power requirementsand provides a simulationfor this work usingPV*SOLprogram (3D) selection. All solarPV system componenteswere determined and similar appeared to the mathmaticalcalculations.

The use of renewable energy intherecent years has become terribly important, particularly solarPVplants.In this paper, a comparison study was made betweenthePV*SOLprogram and the MATLAB simulationprogramwhich used to calculatethe design procedures for the solar plant laboratory inside Technical College ofEngineering /Mosul.A NewZealand methodto design and sizing solar PV system, was depended for these calculation, including the environmenteffect and some factors related with solar system components.The results showed the best design with less components and cost .Finally both programs gave the same design.

The last decade was characterized by enormous urban development projects within the center of Erbil where commercial land use is dominant and it is represented by traditional markets or Bazaars. Neshtiman commercial complex is an example that has some distinguishing features in comparison with the adjacent traditional Bazaar.
The issue of visual integration in urban development is regarded as an essential matter which gives more positivity to the project and enhances the whole area. Urban masters had mentioned and established some indicators of the visual integration.
This paper tries to explore the visual integration indicators of the Neshtiman complex with its traditional surroundings in order to improve the existing situation and to obtain some guidelines that may be helpful in future development projects.

In petroleum industrial systems, analysis of power systems should be considered to exploit system reliability and prevent change in process performance during starting in equipment such as induction motors and industrial pumps. Medium-voltage induction motors are essential electrical machines in the oil, petrochemical, and process industries; therefore, the study of induction motors is an integral part of the analysis of power system. These motors are directly fed from the power grid and are exploited afterward. The starting current of induction motors is 5 to 7 times greater than the nominal current at the moment of starting until it reaches the nominal torque. This starting current will result in the motors and transformer and voltage drop in users' appliances connected to the electric grid to the extent that it might even cause a shutdown in the grid or not start the motor. It will also directly impact the power quality of the power system. For this reason, the starting voltage drop should not exceed 15% of the terminal voltage. In this paper, the starting of squirrel cage induction motors 1000kW by variable frequency drive in Tabriz pump station has been analysed by the ETAP 19.0.1 software.