Person: VARDAR, ALİ
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VARDAR
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ALİ
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Publication Regional energy production with PV and CPV panels in north-west Turkey(Parlar Scientific Publications (P S P), 2020-01-01) Biçen, Tuğba; Vardar, Ali; Biçen, Tuğba; VARDAR, ALİ; Bursa Uludağ Üniversitesi; 0000-0001-6349-9687; CGD-9496-2022; AAH-5008-2021In this study, solar radiation data and current energy potential analysis were made in 12 locations selected in the north west of Turkey and solar energy characteristics of the region were revealed. In the research, especially the technologies used in the production of electricity from solar radiation were discussed. On the basis of regional characteristics of solar energy, the solar panels can produce different amounts of energy were determined. In this context, while the regional average of 166.3 to 223.3 kWh/m(2) of energy can be produced from monocrystalline panels (PV) and the regional average of 155.2 to 208,4 kWh/m(2) of energy can be produced from polycrystalline panels (PV) were determined. Additionally, the regional average of 310.4 to 416.9 kWh/m(2) of energy can be produced from concentrator solar panels (CPV) was established.Publication Technical and economic evaluation of energy production from wind in İstanbul and surrounds(Univ Cape Town, Energy Res Centre, 2015-11-01) Vardar, Ali; Taşkın, Onur; VARDAR, ALİ; TAŞKIN, ONUR; Uludağ Üniversitesi/Mühendislik Fakültesi/Biyosistem Mühendislik Bölümü; 0000-0001-6349-9687; 0000-0002-5741-8841; AAH-5018-2021; AAH-5008-2021Istanbul is located in the northwest part of Turkey and has the greatest population of any city in the country. Istanbul and its surroundings were researched for wind potential. Energy production from wind was evaluated technically and economically in this study. Corlu, Kumkoy and Sile sites were examined. Other sites in the same region (Goztepe, Kirecburnu, Bahcekoy, Florya and Kartal) were also evaluated but the results were not satisfactory, and for this reason, these sites were not examined in this study. When we checked daily, monthly and yearly wind speed values and frequency distributions, the wind energy potential of Corlu, Kumkoy and Sile were greater than other sites. Corlu, Kumkoy and especially Sile's wind speed data are statistically decreasing. A Nordex N117 91m hub height wind turbine can produce 6099 MWh in Corlu, 6459 MWh in Sile, 7265 MWh in Kumkoy. A Nordex N117 91m hub height wind turbine can produce 6471 MWh in Corlu, 7439 MWh in Sile and 8175 MWh in Kumkoy. The energy costs were calculated by the average of 36 years of wind measurement data using Nordex N117 turbines. Energy costs with Nordex N117 91 m and 140 m hub height in Corlu, Sile and Kumkoy are 0.025- 0,027 US$/ KWh, 0.022- 0,025 US$/ KWh, 0.020- 0,023 US$/ KWh, respectively.Publication Developing wind-concentrator systems for the use of wind turbines in areas with low wind-speed potentials(Wiley-V C H Verlag Gmbh, 2015-12-01) Vardar, Ali; Eker, Bülent; Kurtulmuş, Ferhat; Taşkın, Onur; VARDAR, ALİ; KURTULMUŞ, FERHAT; TAŞKIN, ONUR; Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü/Tarımsal Enerji Sistemleri.; Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü/Tarım Makina Sistemleri.; 0000-0001-6349-9687; 0000-0002-5741-8841; AAH-5008-2021; AAH-5018-2021; R-8053-2016The ability to supply energy in rural areas and in agricultural plants with renewable energy technologies, especially wind energy, is advantageous in terms of a sustainable environment and the increasing cost of energy. Today, wind turbines are used actively in many areas, some of which are for commercial purposes. Small-scale wind turbines that produce electricity directly have the necessary characteristics for use in agricultural plants. In this study, wind-concentrator systems for small-scale wind turbines that can be used in agricultural electrification applications have been designed for geographical areas where the wind-speed potential is low. Three different concentrator systems have been designed to make use of low wind-speed potentials and obtain high power values with relatively small rotor diameters. The three different designs have been produced as prototypes, and power values of 324-503 Wm(-2) (at 5 ms(-1) wind speed) can be obtained by concentrating the wind. The efficiency, power, energy production capacity, and economic elements of the models were determined, and the possible results for agricultural plants have been assessed. According to these assessments, the efficiency values are 71 and 90% for wind speed and 410 and 600% for wind power. The energy production capacities are a maximum of 6462, 5193, and 8226 kWhm(-2) per year for the conical wind-concentrator system, the wind-concentrator system with a panel, and the wind-concentrator system without a panel, respectively. If the energy production cost per unit of these systems is considered, these systems are not economical. Therefore, these systems must be produced on a large scale to become economical, and their size must be enlarged to reduce the cost. Consequently, the potential power values per unit area and the potential energy values per unit produced by the wind-concentrator systems will contribute to the production of more energy than that achieved by current wind turbines.