01. Araştırma Çıktıları | WoS | Scopus | TR-Dizin | PubMed

Permanent URI for this communityhttps://hdl.handle.net/20.500.13091/1

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Citation - WoS: 10
Citation - Scopus: 10
An Experimental Study on Determination of Optimal Tilt and Orientation Angles in Photovoltaic Systems
(Academic Publication Council, 2025) Arslan, Mustafa; Cunkas, Mehmet
This paper determines the most suitable azimuth and tilt angles for photovoltaic (PV) panels to generate electricity from solar energy. Literature reviews typically focus on maximizing radiation values on fixed panels. However, this study identifies the optimal position for maximizing the total radiation falling on PV panels with varying azimuth and tilt angles. An experimental setup is established to measure solar radiation, power, and temperature data. The electrical energy, open-circuit voltage, and short-circuit current produced by the PV panels are measured and recorded simultaneously. The performance of PV panels at different azimuths and tilts on power output is examined and compared. Experimental results have indicated that panel tilt and azimuth angles significantly impact power generation, currents, and fill factor. Based on the theoretical and experimental results obtained, the optimal tilt angle on the horizontal plane for Konya province, T & uuml;rkiye, is determined to be 32.08 degrees, with the most suitable azimuth angle being 0 degrees. This article could serve as a suitable guide for finding the optimal tilt angle for similar locations in the future.
Investigation of Deformation-Based Damage Limits for RC Columns in Different Seismic Codes
(Academic Publication Council, 2023) Foroughi, Saeid; Yuksel, Suleyman Bahadir
The seismic performance of reinforced concrete (RC) columns is related to the expected damage limits under seismic loads and how this damage relates to the safety of the structure. To assess the performance of RC columns under seismic loads, performance-based deformation and damage limits have been proposed by seismic codes. Adequacy of the deformation and damage limits provided in the American Society of Civil Engineers, Seismic Evaluation and Retrofit of Existing Buildings Standard (ASCE/SEI-41, 2017) and the Turkish Building Earthquake Code (TBEC, 2018) were evaluated by performing parametric studies for RC columns. RC circular columns are designed in parametric studies to elucidate the effects of the compressive strength of concrete, axial load levels, and spiral reinforcement ratio on performance-based damage limits. The performance limits corresponding to each performance level obtained using different seismic guidelines were compared. The crosssection damage limits of ASCE/SEI-41 (2017) and TBEC (2018) were significantly different, which could change the performance level of the building. TBEC (2018) yielded approximately 50% conservative limits compared to the ASCE/SEI-41 (2017) limits. As a result, TBDY (2018) seems to offer safer and more ductile solutions than ASCE/SEI-41 (2017).
Citation - WoS: 2
Citation - Scopus: 2
Maximum Entropy Model-Based Spatial Sinkhole Occurrence Prediction in Karap?nar, Turkey
(Academic Publication Council, 2023) Metwally, Safi Eldein. M.; Yalçın, Mustafa
Sinkholes in Karapinar and their rapidly increasing occurrence rate are considered one of the main hazards that threaten arable lands and human life. The sudden occurrence and unavoidable characteristics of sinkholes make them more dangerous and challenging to avoid. More than 300 sinkholes have been recorded in the Karapinar region of Konya province in Turkey. There are intensive agricultural activities in the region, and therefore over 60,000 water wells are used to meet the demand. Thus, drought, the effects of climate change and decreasing precipitation rate reveal stress on sinkhole occurrence due to the geological structure of the region and its high tendency to sinkholes since ancient times due to its volcanic history.The primary purpose of this study is to predict possible sinkhole occurrence probabilities in Konya, Karapinar region based on historical occurrences and to report to the authorities to raise awareness about this problem. The Maximum Entropy (MaxEnt) model is applied for sinkhole susceptibility mapping by evaluating 17 variables affecting sinkhole occurrence in meteorological, topographic, environmental, and geological aspects. The results indicated that 458.52 km2 (2.48%) of the study area is highly susceptible to sinkholes. 100 sinkholes were assigned as sample data, and 45 sinkholes were set as test data for the MaxEnt model. The AUC values of training data with 0.978 and test data with 0.963 were calculated where a good correlation was provided. The variables Annual Mean Temperature, Precipitation Seasonality (Coefficient of Variation) Geology, and precipitation, which are mostly responsible for sinkhole formations, have been calculated.

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