Person: VARDAR, ALİ
Loading...
Email Address
Birth Date
Research Projects
Organizational Units
Job Title
Last Name
VARDAR
First Name
ALİ
Name
6 results
Search Results
Now showing 1 - 6 of 6
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; 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 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 The development of renewable energy sources in Turkey(European Center Sustainable Development, 2014-01-01) Çetin, Atalay; Vardar, Ali; VARDAR, ALİ; Ziraat Fakültesi; Biyosistem Mühendisliği Bölümü; 0000-0001-6349-9687; J-6015-2019; AAH-5008-2021Especially in last two decades, most of the developed and developing countries around the world have been supporting the researches that investigate more clean and sustainable energy sources. Renewable energy sources play more important role in today's increasingly globalized energy market because of the environmental issues and the sources of fossil fuel are becoming scarce. According to that, as a virtue of the rapidly increase in energy demand, the supply of renewable energy sources are increasingly continue around the world. As a matter of fact, when it is compared to the 2011 rates, the consumption rate of hydro-electricity and other renewable energy sources has increased to 4.3% and % 15.2 respectively in 2012 in the world, is verifying that view.The aim of this study is to investigate the present potential and sufficiency of the main sources of renewable energy such as solar, wind, hydropower, geothermal and biomass at Turkey. In this regard, even Turkey has a remarkable potential especially in hydro, wind, solar and geothermal energies among Europe, renewable energy sources ratio in Turkey's total energy consumption is not rising at desired level. Furthermore because Turkey hasn't got a rich fossil fuel reserves, it needs to import fossil energy sources to meet its rapidly growing energy needs. In related to this, Turkey's current deficit has been growing due to the increase in fossil fuel sources prices at international energy markets. On the other side Turkey's Green House Gases (GHGs) emission has grown more than two times as a result of its rapidly using of fossil fuel sources due to its growing economy, industrialization and urbanization process since 1990. Within this context, as a foreign dependent country on fossil fuel energy sources (especially on crude oil and natural gas), Turkey should rapidly change its energy policy from fossil fuels to renewable energy sources which are domestic, clean and much more cheaper.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; Ziraat Fakültesi; Biyosistem Mühendisliği Bölümü; Tarımsal Enerji 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.Publication The determination of wind-powered irrigation potential in Turkey(Univ Agricultural Sciences & Veterinary Medicine Bucharest, 2014-01-01) Taşkın, Onur; Uğlu, Gülsah; Büyükcangaz, Hakan; Vardar, Ali; TAŞKIN, ONUR; BÜYÜKCANGAZ, HAKAN; VARDAR, ALİ; Uludağ Üniversitesi; AAH-5008-2021; AAH-5018-2021; AAH-2934-2021Irrigation is considered a common need for agricultural production in all around the world. Instead of the high priced fossil fuels, wind-powered agricultural irrigation is an alternative usage of renewable energy in Turkey. However, it is necessary to be researched technically and economically before the implementation. In this paper; crop types, geographical frame, and groundwater quantity were taken into consideration in the context of technical feasibility. A cost analysis was done by consideration of the costs of water storage tanks, wind turbine, and pump as an economic feasibility study. The results of feasibility study provided that there is enough irrigation potential based on wind power in Marmara, Aegean and East Mediterranean regions. The increase in wind-powered irrigation will optimize the agricultural water use and preserve the environment from adverse impacts of greenhouse gases.Publication Design and performance of a hybrid (photovoltaic/wind) energy-assisted industrial dryer(Parlar Scientific Publications (P S P), 2019-01-01) Taşkın, Onur; İzli, Nazmi; Vardar, Ali; TAŞKIN, ONUR; İZLİ, NAZMİ; VARDAR, ALİ; Ziraat Fakültesi; Biyosistem Mühendisliği Bölümü; 0000-0002-5741-8841; 0000-0001-6349-9687; R-7996-2016; AAH-5018-2021; AAH-5008-2021An experimental hybrid energy-assisted dryer with a photovoltaic and wind auxiliary power system was designed, fabricated and tested. The developed dryer has been used in various weather and operating conditions. The effects of three drying air temperatures (50, 60, and 70 degrees C) and two air velocities (3 and 4 m/s) were investigated for maize kernel drying. Drying performance was evaluated in terms of drying kinetics, specific and total energy consumption, color and rehydration ratio. The results showed that total drying time decreased as the air velocity and drying air temperature increased. Depending on the drying times, the power-generation performances of the photovoltaic panels and the wind turbine were between 5.298 and 3.922 W, and 518 and 311 W, respectively. However, the energy consumption of the dryer was between 39.977 and 22.356 W. The best specific energy consumption was 7.561 kWh/kg at 50 degrees C at 3 m/s for 565 minutes. The color parameters indicated maize darkening in all drying conditions. The rehydration assays showed that rehydrated maize kernels reached a higher capacity with increased air temperature and air velocity.