Profile URL: https://hdl.handle.net/20.500.13091/11917
Job Title:Öğr. Gör.
Email Address:reunal@ktun.edu.tr
Main Affiliation:07. 10. Department of Electricity and Energy
Status: Current Staff
ORCID:
0000-0002-8019-2107
0000-0002-8019-2107Scopus ID:
57222162653
57222162653YÖK Akademik: 2B0DB32D493920F8
Google Scholar:
9VL4Y9sAAAAJ
9VL4Y9sAAAAJName Variants:
Ünal, R. Emre Ünal, Recep E.
5 results
Scholarly Output Search Results
Now showing 1 - 5 of 5
Article Citation - WoS: 7Citation - Scopus: 6Experimental Study of a Micro-Scale Sloped Solar Chimney Power Plant(Korean Soc Mechanical Engineers, 2021-12-01) Güzel, Muhammed Hüseyin; Ünal Ercan, Hatice; Köse, Faruk; Unal, Recep EmreSolar chimney power plants (SCPP) are structures that have the potential to generate a significant amount of electrical energy without harming the nature. Within the scope of this study, a micro-scale sloped solar chimney power plant (MSSCPP) experimental setup with a chimney of 8 m height and a sloped collector of 6.4 m diameter was designed and constructed. The air temperature in the collector and the velocity of the air in the chimney were recorded and analyzed in detail. The results obtained from the experiments show that the effect of solar radiation on the temperature and velocity of the air is remarkable. The effect of solar radiation on the efficiency of sloped collector found to be 14.2 %. In addition, although the dimensions of the experimental setup are small, the difference between temperatures at the inlet and outlet of sloped collector are increasing up to 2.4 degrees C and air velocity at the inlet of the chimney reaches 2.2 m/s. Large-scale sloped solar chimney power plants (SSCPP) can be used to help meet the electricity demand, especially in rural areas with natural slopes.Article Citation - WoS: 13Citation - Scopus: 16The Fuzzy Logic-Based Modeling of a Micro-Scale Sloped Solar Chimney Power Plant(KOREAN SOC MECHANICAL ENGINEERS, 2021-02-27) Güzel, Muhammed Hüseyin; Ünal Ercan, Hatice; Önder, Ahmet; Şen, Muhammed Arif; Köse, Faruk; Unal, Recep EmreThe energy demand of world is increasing worldwide because of increasing population and developing technology. The use of environmentally friendly renewable resources is very important in providing the increasing energy needs. In the renewable energy sources, the solar energy has a strategic importance because of its huge potential and unlimited. The production of electrical energy by solar chimney power plants is one of the reliable and profitable methods. Fuzzy logic-based approaches are commonly used for modeling different systems in many fields. Also, a renewable energy system can be modelled by fuzzy definitions. In this way, it can provide efficiently and quickly theoretical estimates of systems with productive simulations. In this study, using the experimental data obtained from the micro-scale sloped solar chimney power plant in carried on scientific research project by authors, the obtaining and verifying a fuzzy logic-based model (FLBM) that can calculate the change in air velocity at turbine according to the change of radiation and temperature is presented. The air velocity at the turbine inlet is the considerable variable determining the electricity generation in a solar chimney. Thus, the output of the model is determined as this air velocity. In changes in the radiation and temperature values are defined as inputs. A two input-one output fuzzy model is obtained, in which the inference method is designed in the form of Mamdani and the membership functions in the form of the triangle, making inferences according to the rule base determined by the experience achieved from the experimentally studies. In order to investigate the accuracy of the FLBM, the simulation results and the data get from experimental setup in April 2019 are compared and evaluated. The validation of the FLBM compared to the experimental system is investigated using different error evaluation criteria. It is proved that the results of FLBM and experimental data are realized at a high rate (95.95 %) close to each other and similarly.Article Citation - WoS: 7Citation - Scopus: 5Investigation on the Cost-Effective Optimal Dimensions of a Solar Chimney With the Bees Algorithm(Springer Heidelberg, 2022-09-20) Ünal, Recep Emre; Güzel, Muhammed Hüseyin; Sen, Muhammed Arif; Köse, Faruk; Kalyoncu, MeteSolar chimney systems which consist of three main parts (collector, chimney, turbine) are one of the main thermal methods that produce electricity using solar energy. In a solar chimney, the high-power generation that can be obtained by increasing the design dimensions can also cause ineffective high investment costs. In this study, differing from the traditional design approach, a heuristic optimization method based on the Bees Algorithm is present to obtain the optimum design parameters (the chimney and collector dimensions) that are provided the more effective solutions. It is made for 3 configurations in order to prove the accuracy of the optimization study using different algorithm parameters. By using the obtained mathematical equations and the defined non-currency investment cost unit for a traditional solar chimney, the optimum design parameters that can provide more power output with acceptable costs are investigated. Two main objectives are taken into consideration namely maximizing efficiency of solar chimney system and minimizing investment cost. In the optimization process, within the ranges determined for the decision variables, the maximum and minimum dimensions are determined as 1293.05-1330.47 m for the collector diameter, 94-99 m for the chimney diameter and 783-792 m for the chimney height. The obtained results showed that this open to develop approach proposed within the scope of the study can be useful in the optimal design of solar chimney systems.Master Thesis Bir Mikro Güneş Bacası için Türbin Tasarımı, İmalatı ve Deneylerinin Yapılması(Konya Teknik Üniversitesi, 2019) Ünal Ercan, Hatice; Köse, Farukile elektrik üretiminde kullanılan yeni sistemlerden birisi de güneş bacalarıdır. Güneş bacaları; kollektör, baca ve türbin olmak üzere üç ana elemandan oluşur. Güneş ışınımı etkisi ile ısınan ve yükselen hava, bacanın da vakum etkisi ile baca girişine yerleştirilen bir türbini döndürerek elektrik enerjisi üretilir. Bu çalışmada 10 m baca yüksekliğinde, 6,4 m kollektör çapına sahip eğimli bir güneş bacası sistemi deney seti olarak kullanılmıştır. Güneş bacası sistemi üzerinde montajı yapılan sensörler ile 10 saniye aralıklarla kollektör giriş ve çıkış hava sıcaklığı, dış ortam sıcaklık, baca giriş ve çıkışı hava akış hızı, dış ortam rüzgar hızı, baca içerisindeki basınç farkı, türbin devir sayısı ve güneş ışınımı değeri verileri alınarak değerlendirmeler yapılmıştır. Türbin kanatları 3 farklı kanat profilinden imal edilmiştir. 5 kanata sahip olan güneş bacası türbini için alüminyum döküm yöntemi kullanılarak toplamda 15 adet kanat imalatı yapılmıştır. Baca çapı ölçüsüne göre imal edilen türbin baca girişine montajlanmıştır. NACA0015, NACA2415, NACA4415 profil tipinde imalatı yapılan kanatlar 3 farklı hatve açısında test edilmiştir. Çalışma sonucunda güneş ışınımı ve kollektör çıkış sıcaklığının baca girişi hava akış hızı üzerinde doğrudan etkisinin olduğu gözlemlenmiştir. Bu profil tiplerinde kamburluk oranı arttıkça ve hatve açısı azaldıkça türbin devir sayısında artış olduğu tespit edilmiştir. NACA4415 profilinin 40° hatve açısında en verimli model olduğu sonucuna ulaşılmıştır.Article Solar Radiation Estimation Using Anfis Model: Evaluation of Membership Function Types and Data Selection(Springer Nature, 2024-04-04) Unal, R.E.; Guzel, M.H.; Sen, M.A.; Aksoy, M.H.This study proposed a model for estimating monthly solar radiation values using the adaptive network-based fuzzy inference systems (ANFIS-SR). The ANFIS-SR model is obtained by training the meteorological measurement data from the Adana province from 2017 to 2021. The monthly average sunshine duration and ambient temperature are inputs for the ANFIS-SR. The investigation evaluates the impact of different membership functions and data selection methodologies for training and testing on the ANFIS-SR outcomes. Four types of membership functions, Triangular (Trim), Gaussian, Trapezoidal, and Generalized Bell-Shaped (Gbell), are considered to study the input's influence. Additionally, two data selection cases are examined: one involving a serial date (S cases) arrangement and the other with a random (R cases) order. According to the errors, Gbell ensures higher estimating performance with the lowest error than other membership functions in training and testing data in S cases. In the case of R, Gbell is more successful in the training, while Trim can provide better estimates on the testing data. The test results show that the mean absolute percentage error and regression values are 4.364% and 0.984 for S cases and 4.265% and 0.981 for R cases, respectively. According to the obtained results, the Gbell membership function provides more solar radiation prediction performance than the others for the examined location. It also shows that random data selection outperforms serial data selection. The results prove that the proposed model ANFIS-SR can effectively model solar radiation estimation within an acceptable error range, thus offering substantial application potential in this field. © The Author(s) under exclusive licence to Iranian Society of Environmentalists (IRSEN) and Science and Research Branch, Islamic Azad University 2024.
Research Topics
Domains
Physical Sciences
Fields
EngineeringEnergy
Subfields
Building and ConstructionMechanical EngineeringRenewable Energy, Sustainability and the Environment
Specific Research Areas
Building Energy and Comfort Optimization
Solar Energy Systems and Technologies
Solar Thermal and Photovoltaic Systems
Innovative Energy Harvesting Technologies
Photovoltaic System Optimization Techniques
Sustainable Development Goals
7AFFORDABLE AND CLEAN ENERGY
4
Research Products
11SUSTAINABLE CITIES AND COMMUNITIES
2
Research Products
Documents
4
Citations
27
h-index
3
This researcher does not have a WoS ID.
Publication Collaboration
| Affiliation Name | Count |
|---|---|
| Konya Technical University | 4 |
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Data obtained from OpenAlex
| Journal | Count |
|---|---|
| International Journal of Energy and Environmental Engineering | 1 |
| International Journal of Environmental Science and Technology | 1 |
| Journal Of Mechanical Science And Technology | 1 |
| JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | 1 |
Current Page: 1 / 1
Scholarly Output
5
Articles
4
Views / Downloads
15/49
Supervised MSc Theses
1
Supervised PhD Theses
0
WoS Citation Count
27
Scopus Citation Count
27
Patents
0
Projects
0
WoS Citations per Publication
5.40
Scopus Citations per Publication
5.40
Open Access Source
1
Supervised Theses
1
Scopus Quartile Distribution
Competency Cloud
