Yazar "Dehghanpour, Heydar" seçeneğine göre listele

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    Öğe
    A review study on cooling towers; Types, performance and application
    (Alanya Alaaddin Keykubat Üniversitesi, 2019) Afshari, Faraz; Dehghanpour, Heydar
    Temperature control is a significant requirement inthe most industrial process. In this regard, cooling towers are key parts ofmany power plant installations. Operation of the cooling tower as heatrejection device is based on a principle where waste thermal energy isextracted from hot water to the atmosphere using relatively cool and dry air. Inthis study, a review study is carried out to investigate different types ofcooling towers, their application, performance, usage and working principles,which can be useful in the field of nuclear plants as well as other energystations. A number of investigations have been considered to reveal differencesbetween the used cooling towers and finally a Fluent simulation has been carriedout to examine major contours and flow field around the cooling tower. 
  • [ X ]
    Öğe
    ABAQUS modeling and investigation of nuclear central cooling tower reinforced by CFRP
    (Alanya Alaaddin Keykubat Üniversitesi, 2019) Dehghanpour, Heydar; Afshari, Faraz; Yılmaz, Kemalettin
    Concrete is recognized as the most ideal material forconstruction of cooling towers. Because it isa relatively durable material to certain chemical environments, gases and high temperatures but, being a brittle material, concrete is damagedwhen subjected to tensile and flexural stresses. Inaddition, tensile and flexural stresses in high structures such as towers arecaused by horizontal loads such as wind loads. Therefore, it is important toexamine the materials used in such serious structures and the repair materialsto be applied after construction. In this study, it is aimed to simulate asuper-large reinforced concrete cooling tower using ABAQUS program as a sheet, by considering previous studies on the structure ofcooling towers. In the models, the strain and stressbehaviors against the wind load were investigated by reinforcing the middlezone of the tower by carbon fiber reinforcedpolymer (CFRP) sheets in different thicknesses. 
  • Küçük Resim
    Öğe
    Experimental investigation of pull-out and shear behavior of lifting sockets in precast UHPC panels
    (2022) Maraşlı, Muhammed; Subaşı, Serkan; Dehghanpour, Heydar; Özdal, Volkan; Kohen, Beni
    The increasing demands and needs of human beings reveal the need to increase the performance of construction techniques and materials in the construction sector. Recently, the use of ultra high performance concrete (UHPC) on building facades has been increasing due to their superior mechanical and physical properties. Since UHPC products are relatively heavy, it is important to examine the lifting apparatuses for safety. In this study, pull-out and shear behavior of lifting sockets embedded in UHP precast panels produced in real geometry and dimensions were investigated. UHPCs consist of two different mixtures as A and B. Two different types of lifting sockets with the trade names RD and TF were used. Pull-out and shear test results proved that lifting sockets are sufficient as safety in both mixtures. The results obtained can contribute to the literature in this area and provide insight into the reliable lifting and handling procedure of precast facade panels.
  • [ X ]
    Öğe
    Production of waste polystyrene-based composites and evaluation as corrosion inhibitor for rebar coating
    (Alanya Alaaddin Keykubat Üniversitesi, 2020) Dehghanpour, Heydar; Baş, Enes; Akçaer, Nihan; Yılmaz, Kemalettin
    Korozyon donatı takviyeli yapı elemanlarında en etkili yapısal hasarlardan biridir. Beton yapılarını korozyondan korumak için farklı yöntemler uygulanmaktadır. Bu çalışmada, donatı korozyonunu önlemek için geri dönüşümlü polistiren esaslı kompozit malzemelerin kaplanması ve elektriksel yöntemlerle incelenmesi amaçlanmıştır. Kompozitlerdeki matris elemanı, atık polistiren köpük malzemesinin benzinde çözülmesiyle elde edilmiştir. Katkı maddesi olarak karbon, karbon fiber ve standart kum kullanılmıştır. Kür havuzunda 28 günlük yaşlarını tamamlayan donatı takviyeli silindir beton numuneleri, 48 saat boyunca % 3 NaCl çözeltisinde 70 Volt voltaj uygulayarak korozyon hızlandırılmasına maruz bırakılmıştır. Numunelerin korozyon durumunu belirlemek için tek-elektrot ve dört-noktalı iletkenlik ölçüm testleri yapılmıştır. Aynı numuneler üzerinde yarmada çekme testi yapılmıştır. Elde edilen sonuçlara göre, kaplanmış donatı takviyeli numunelerin yarmada çekme mukavemeti kontrol numunesi ile karşılaştırıldığında önemli ölçüde değişmediyse de, tüm kaplanmış donatı takviyeli numunelerin korozyon durumları olumlu olarak tespit edilmiştir. Ayrıca, yarmada çekme test esnasında kaplanmış donatılar ve beton arasında iyi bir aderans olduğu tespit edilmiştir.