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Article
APPLIED SECOND LAW OF THERMODYNAMICS ON THE WIND ENERGY OVER IRAQ

Author: Fadhil Abdulrazzaq Kareem
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2018 Volume: 22 Issue: 2 (Part-2) Pages: 75-92
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Although Iraq is an oil country, but it’s have very large sources of renewable energy. This study was discussed the results of the wind energy and exergy for six regions in Iraq at three different turbine heights. The highest exergy efficiency was in Basrah then Anbar, Tikrit, Najaf, Baghdad, and smallest in Mosul. The exergy efficiency was increase by 60 % at height 50 m, while it’s increasing by 70 % at height 100 m. The highest exergy destruction was in Mosul, Najaf, Tikrit, Baghdad, and smallest in Anbar and Basra. The exergy destruction decreasing by 33 % at height 50 m, while its decreasing by 68 % at height 100 m. The high energy efficiency was in Basra, then Anbar, Tikrit, Najaf, Baghdad, and the smallest in Mosul, the energy efficiency of a turbine increase by 52 % at height 50 m, while it’s increasing by 66 % at height 100 m. And the highest output useful energy was in Basra, then Anbar, Tikrit, Baghdad, Najaf, and it’s very small in Mosul, it is found that the output energy from turbine increase by 85 % at height 50 m, while its increase by 94 % at height 100 m


Article
UTILIZING A PERMANENT-MAGNET ALTERNATOR WITH THE FULL CONVERTER IN WIND TURBINE INCREASES THE EFFICIENCY OF SUPPLYING AN ACTIVE AND REACTIVE POWER TO THE ELECTRICAL NETWORK

Author: Muhammad Al Badri
Journal: Al-Qadisiyah Journal for Engineering Sciences مجلة القادسية للعلوم الهندسية ISSN: 19984456 Year: 2018 Volume: 11 Issue: 1 Pages: 10-21
Publisher: Al-Qadisiyah University جامعة القادسية

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Abstract

The alternator depends entirely on the conversion of kinetic energy into electrical energy by the presence of a magnetic factor. Wind energy is defined as the process of converting wind energy into another form of energy that is easy to use. In this paper, a permanent-magnet-alternator (PMA) with full-converter (FC) was used in the wind turbine (WT) generator instead of the excitation coil of the magnetic field. This method was used to save lost energy in the induction coil. A complete wind turbine model with a (FC) was connected to a generator with a fixed magnetic field and an electric grid was fed. This simulation system was completed by PSIM simulation program. In this work, the IP control system was used to operate the simulation system. In this study, a greater stable amount of real and reactive power was obtained from the wind turbine

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