IZTECH Research Centers Collection / İYTE Araştırma Merkezleri Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/11147/2636
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Conference Object Dünya’da ve Türkiye’de Jeotermal Enerjinin Gelişiminde Araştırma Merkezlerinin Yeri(TMMOB Makina Mühendisleri Odası, 2011) Hancıoğlu Kuzgunkaya, Ebru; Gökçen, Gülden; Baba, AlperJeotermal enerji alanında araştırma, geliştirme faaliyetleri ile mevcut jeotermal enerji uygulamalarının topluma tanıtılması çalışmalarını yürüten Jeotermal Araştırma Merkezleri ABD ve Avrupa’da 1970’li yıllardan bu yana çalışmalarını sürdürmektedir. Türkiye’de 1935 yılında Enstitü adıyla yerbilimleri alanında bilimsel araştırma ve uygulama yapmak üzere kurulan MTA, yerbilimleri alanında Türkiye’nin ilk ve en önemli araştırma kurumu olmuştur. Jeotermal enerji ile ilgili ilk çalışmalar MTA tarafından 1960’lı yıllarda başlatılmıştır. Yaklaşık 50 yıllık süreçte geliştirilen sahalar, çeşitli uygulamalar, yasal düzenlemelerle bugün jeotermal enerji kaynaklarına yoğun bir ilgi gösterilmektedir. Bu süreçte ülkemizde bazı üniversitelerin bünyesinde “Araştırma Merkezleri” oluşturulmaya başlanmış, fakat Amerika ve Avrupa’daki benzerlerine yakın performans gösterememişlerdir. Ülkemizde birçok kurum ve özel kuruluş bu Araştırma Merkezleri hakkında bilgi sahibi değildir ve karşılaştıkları sorunlarını çözmekte zorlanmaktadırlar. Bu çalışma kapsamında Dünyada ve Türkiye’de Jeotermal Araştırma Merkezlerinin özellikleri, bilimsel araştırmaları, kamu ve özel sektör ilişkileri, araştırmalara getirebilecekleri yenilikler ile ilgili bilgiler irdelenmiştir.Article Citation - WoS: 32Citation - Scopus: 30Geochemical and Hydrogeochemical Characteristics and Evolution of Kozaklı Geothermal Fluids, Central Anatolia, Turkey(Elsevier Ltd., 2019) Baba, Alper; Şener, Mehmet FurkanKozaklı is one of the most important areas of Central Anatolia in terms of geothermal potential and it is characterized by thrust and normal faults. These faults, accommodating deep circulation of hydrothermal fluids of meteoric origin, are the primary controls of the geothermal systems in this region. Chemical and isotopic composition of the hot springs and geothermal fluids was monitored throughout 2017. The surface temperature of the fluid ranges from 24.9 to 96 °C. The cold spring waters are mostly of the Ca-Mg−HCO3 type in the study area. Major element chemistry of the water reveals that the deep geothermal fluids are mostly of the Na-Ca-Cl-SO4 type while the shallow geothermal well waters are Ca-Na−HCO3 waters. Silica geothermometers suggest that the reservoir temperature ranges from 103 to 173 °C. Based on the δ18O–δD relationship, water samples have a high-altitude meteoric origin. Stable isotopic data indicate that the geothermal fluids are formed by local recharge and deep circulation of meteoric waters. The Rare Earth Elements and Yttrium (REY) composition showed that Eu, Ce and Y anomalies are related both to inheritance from geological host materials and the fractionation of these elements during water-rock interactions.Article Citation - Scopus: 19Application of Geothermal Energy and Its Environmental Problems in Turkey(Inderscience Enterprises Ltd., 2015) Baba, AlperHuman beings have been benefiting from geothermal energy for different uses since the dawn of the civilisation in many parts of the world. One of the earliest uses of geothermal energy was for heating and it was used extensively by Romans in Turkey. The Aegean region is favoured by a large number of thermal springs known since ancient times. However, it was first in the 20th century that geothermal energy was used on a large scale for direct use and electricity generation. The country's installed heat capacity is 2,705 MWt for direct use and 322.39 MWe for power production. In parallel to developing geothermal energy applications in Turkey, many sites are now experiencing problems such as water contamination associated with geothermal fluid. Especially, the high temperature solution of elements and compounds, causes operational limitations in geothermal power plants. These limitations are due to the severe scaling and corrosion of geothermal fluid. Copyright © 2015 Inderscience Enterprises Ltd.Article Citation - WoS: 83Citation - Scopus: 92Source of Arsenic Based on Geological and Hydrogeochemical Properties of Geothermal Systems in Western Turkey(Elsevier Ltd., 2012) Baba, Alper; Sözbilir, HasanTurkey is an area of complex geology with active tectonics and high geothermal potential. Especially, the western part of Turkey is a region of abundant geothermal activity. Faults accommodating the deep circulation of hydrothermal fluids of meteoric origin are the primary means by which of geothermal systems are controlled in this region. Many of the thermal activities are related to the improved dilation on the ~E-W-strikes of the graben faults. This situation serves as a suitable environment for the presence of high levels of arsenic in geothermal water resources. The highest concentrations of naturally occurring aqueous arsenic (As) are found in certain types of geothermal waters, generally those related to major graben faults. In this regard, high arsenic concentrations in geothermal resources have been detected in Western Turkey, including but not limited to Biga Peninsulla, Gediz Graben, Kucuk, and Buyuk Menderes Graben with values ranging from 1 to 1419ppb in geothermal fluids. The thermal waters have surface temperatures of up to 100°C and reservoir temperatures range from 150 to 248°C in the Menderes Graben, from 120 to 287°C in the Gediz Graben, and from 153 to 174°C in Biga Peninsula. Hydrogeochemically, the Menderes graben and Gediz Graben thermal waters are of the Na-HCO3, Ca-HCO3, and Na-SO4 types, whereas some geothermal fluids such as those of Tuzla and Kestanbol in the Biga Peninsula, Çeşme, and Urla are of the Na-Cl type.Article Citation - WoS: 30Citation - Scopus: 36Hydrogeological Properties of Hyper-Saline Geothermal Brine and Application of Inhibiting Siliceous Scale Via Ph Modification(Elsevier Ltd., 2015) Baba, Alper; Demir, Mustafa Muammer; Koç, Gonca A.; Tuğcu, CelalScaling is a major obstacle in harnessing of geothermal energy from the geothermal resources. This paper presents a case study for inhibition of metal silicate scaling using formic acid, harvesting more energy in particular case of Tuzla Geothermal Field (TGF), located on Biga Peninsula, in the northwestern of Turkey. TGF is 5. km far from Aegean Sea and 80. km south of Çanakkale. Geothermal fluid of TGF has high salinity (EC. > 91. mS/cm) and medium temperature (reservoir temperature is 173. °C). The acidification of high-salinity brine to mitigate silicate scaling is examined. Results of the study showed that a compromise between scaling and corrosion is achieved by reducing pH of brine to <6 using 55. ppm formic acid.