Pub Date : 2024-05-03DOI: 10.34248/bsengineering.1460518
Sefa Kirnapci, N. Pamuk
Elektrik üretimi için kullanılan fosil yakıtların çevreye olan olumsuz etkilerinden dolayı son dönemlerde yenilenebilir enerji kaynaklarının kullanımında hızla artış yaşanmaktadır. 2015 yılında Paris’te düzenlenen BM İklim Değişikliği Zirvesi’nde alınan en önemli kararlardan biri olarak küresel ısınmanın 2℃’nin altında tutulmasına yönelik bir eylem planının uygulanması konusu görüşülmüş olup bu konuda ülkeler arasında mutabakata varılmıştır. Bu bağlamda dünya genelinde yenilenebilir enerji üretiminde kapsamlı çalışmalar yapılmaktadır. Ülkemizde Enerji ve Tabii Kaynaklar Bakanlığı tarafından yürütülen çalışmalar neticesinde 2011 yılında Enerji Piyasası Düzenleme Kurulu (EPDK) tarafından yayımlanan yönetmelik ile küçük ölçekli üretim tesislerinin lisans alma ve şirket kurma yükümlülüğü ortadan kaldırılmıştır. Lisanssız elektrik üretim yönetmeliğinin uygulanmaya başlamasıyla birlikte ülkemizde güneş enerjisinden fotovoltaik sistemler ile elektrik üretimi hız kazanmıştır. Güneş enerjisi santrallerinin kurulumundan önceki tetkik ve fizibilite çalışmalarının yanı sıra simülasyon programlarından elde edilen detaylı analiz raporları sayesinde sağlıklı veriler elde edilebilmektedir. Fotovoltaik sistem simülasyonu üzerine PVsyst ve PV*SOL programları detaylı veri girişi olanağı sunması ve bu veriler üzerinden olumlu analizler yapabilmesi nedeniyle benzetim programları arasında ön plana çıkmaktadır. Bu çalışmada Hanönü (Kastamonu) Belediyesine ait 2021 yılında kurulumu yapılmış 276 kWp gücünde fotovoltaik güneş enerji santralinin PVsyst ve PV*SOL programları kullanılarak simülasyonları oluşturulmuş ve performans analizleri gerçekleştirilmiştir. Tesisin işletmeye alındığı tarihten itibaren ürettiği elektrik miktarı benzetim sonuçları ile karşılaştırılarak benzetim programlarının doğrulukları ve performansları değerlendirilmiştir.
{"title":"Hanönü (Kastamonu) Güneş Enerjisi Santralinin Farklı Simülasyon Programları ile Tasarımı ve Elektrik Enerjisi Üretim Sonuçlarının Değerlendirilmesi","authors":"Sefa Kirnapci, N. Pamuk","doi":"10.34248/bsengineering.1460518","DOIUrl":"https://doi.org/10.34248/bsengineering.1460518","url":null,"abstract":"Elektrik üretimi için kullanılan fosil yakıtların çevreye olan olumsuz etkilerinden dolayı son dönemlerde yenilenebilir enerji kaynaklarının kullanımında hızla artış yaşanmaktadır. 2015 yılında Paris’te düzenlenen BM İklim Değişikliği Zirvesi’nde alınan en önemli kararlardan biri olarak küresel ısınmanın 2℃’nin altında tutulmasına yönelik bir eylem planının uygulanması konusu görüşülmüş olup bu konuda ülkeler arasında mutabakata varılmıştır. Bu bağlamda dünya genelinde yenilenebilir enerji üretiminde kapsamlı çalışmalar yapılmaktadır. Ülkemizde Enerji ve Tabii Kaynaklar Bakanlığı tarafından yürütülen çalışmalar neticesinde 2011 yılında Enerji Piyasası Düzenleme Kurulu (EPDK) tarafından yayımlanan yönetmelik ile küçük ölçekli üretim tesislerinin lisans alma ve şirket kurma yükümlülüğü ortadan kaldırılmıştır. Lisanssız elektrik üretim yönetmeliğinin uygulanmaya başlamasıyla birlikte ülkemizde güneş enerjisinden fotovoltaik sistemler ile elektrik üretimi hız kazanmıştır. Güneş enerjisi santrallerinin kurulumundan önceki tetkik ve fizibilite çalışmalarının yanı sıra simülasyon programlarından elde edilen detaylı analiz raporları sayesinde sağlıklı veriler elde edilebilmektedir. Fotovoltaik sistem simülasyonu üzerine PVsyst ve PV*SOL programları detaylı veri girişi olanağı sunması ve bu veriler üzerinden olumlu analizler yapabilmesi nedeniyle benzetim programları arasında ön plana çıkmaktadır. Bu çalışmada Hanönü (Kastamonu) Belediyesine ait 2021 yılında kurulumu yapılmış 276 kWp gücünde fotovoltaik güneş enerji santralinin PVsyst ve PV*SOL programları kullanılarak simülasyonları oluşturulmuş ve performans analizleri gerçekleştirilmiştir. Tesisin işletmeye alındığı tarihten itibaren ürettiği elektrik miktarı benzetim sonuçları ile karşılaştırılarak benzetim programlarının doğrulukları ve performansları değerlendirilmiştir.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141129827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-19DOI: 10.34248/bsengineering.1444385
Yusuf Kaplan, İrfan Güngör, Kürşat Alkoyak, Mustafa Tekerli
Hayvan ıslahının en önemli adımlardan biri de damızlık değeri en iyi hayvana üreme şansı verilmesidir. Aynı zamanda küçükbaş hayvancılıkta sürdürülebilirlik için büyüme, üreme ve süt verimi gibi ekonomik özellikler açısından daha verimli hayvanların seçilmesi gereklidir. Hayvanların verimlerine ilişkin damızlık değerlerini tahmin etmek için kullanılan yöntem ve modeller nispeten karmaşık yapıdadır. Çoğu kere yetiştiricilerin kendi başlarına uygulamaları güç olmaktadır. Bu nedenle iyi hayvanların seçimi için basit modellere ve pratik uygulamalara gereksinim duyulmaktadır. Bu çalışmanın amacı, koyun yetiştiricilerinin en iyi kuzularını seçmeleri için pratik bir yöntemi tanıtmak ve bu şekilde kullanılacak damızlıkları belirlemektir. Bu hedefle İvesi kuzularına ait örnek bir veri seti ile “Damızlık Asistanı” adlı bilgisayar yazılımı kullanılmıştır. Veri seti 2016-2018 yılları arasında 49 sürü ve 12 410 baş kuzudan elde edilen doğum ağırlığı (DA), sütten kesim ağırlığı (SKA) ve bu iki özellikten hesaplanan günlük canlı ağırlık artışlarından (GCAA) oluşmaktadır. Damızlık Asistanı ile İvesi kuzularının büyüme özelliklerine önemli çevresel faktörlerin etkisi giderilmiş ve daha sonra kolay indeks yöntemi kullanılarak düzeltilmiş verilerle değerli hayvanlar tespit edilmiştir.
{"title":"İvesi Kuzularında Büyüme Özellikleri için Pratik Bir Damızlık Seçme Yöntemi: Kolay İndeks Uyarlaması","authors":"Yusuf Kaplan, İrfan Güngör, Kürşat Alkoyak, Mustafa Tekerli","doi":"10.34248/bsengineering.1444385","DOIUrl":"https://doi.org/10.34248/bsengineering.1444385","url":null,"abstract":"Hayvan ıslahının en önemli adımlardan biri de damızlık değeri en iyi hayvana üreme şansı verilmesidir. Aynı zamanda küçükbaş hayvancılıkta sürdürülebilirlik için büyüme, üreme ve süt verimi gibi ekonomik özellikler açısından daha verimli hayvanların seçilmesi gereklidir. Hayvanların verimlerine ilişkin damızlık değerlerini tahmin etmek için kullanılan yöntem ve modeller nispeten karmaşık yapıdadır. Çoğu kere yetiştiricilerin kendi başlarına uygulamaları güç olmaktadır. Bu nedenle iyi hayvanların seçimi için basit modellere ve pratik uygulamalara gereksinim duyulmaktadır. Bu çalışmanın amacı, koyun yetiştiricilerinin en iyi kuzularını seçmeleri için pratik bir yöntemi tanıtmak ve bu şekilde kullanılacak damızlıkları belirlemektir. Bu hedefle İvesi kuzularına ait örnek bir veri seti ile “Damızlık Asistanı” adlı bilgisayar yazılımı kullanılmıştır. Veri seti 2016-2018 yılları arasında 49 sürü ve 12 410 baş kuzudan elde edilen doğum ağırlığı (DA), sütten kesim ağırlığı (SKA) ve bu iki özellikten hesaplanan günlük canlı ağırlık artışlarından (GCAA) oluşmaktadır. Damızlık Asistanı ile İvesi kuzularının büyüme özelliklerine önemli çevresel faktörlerin etkisi giderilmiş ve daha sonra kolay indeks yöntemi kullanılarak düzeltilmiş verilerle değerli hayvanlar tespit edilmiştir.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140684002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-19DOI: 10.34248/bsengineering.1456212
Sevgi Aydın
The aviation sector comprises every industry that provides direct assistance to mechanical air transportation. The aviation industry includes a variety of institutions, such as military aviation companies, aircraft manufacturers, and various commercial establishments, all of which play important roles. The analysis of airline market shares was carried out within the realm of the aviation industry. Considering the ongoing trajectory of increasing airline market shares, it is crucial for firms to commit resources towards investing in this industry. Moreover, in reviewing the existing literature, it became evident that there is a dearth of studies undertaken in the field of airline marketing. The main aim of this study was to fill the current research void in the literature. This research examined several aspects like sustainable airport management and business, the airline industry, business-to-business analytics in the airline sector, customer happiness, and customer experience. In addition, the research aims to conduct a SWOT analysis of the airline marketing strategies used by transportation companies.
{"title":"Sustainable Airport Management and Airline Marketing in the Aviation Sector","authors":"Sevgi Aydın","doi":"10.34248/bsengineering.1456212","DOIUrl":"https://doi.org/10.34248/bsengineering.1456212","url":null,"abstract":"The aviation sector comprises every industry that provides direct assistance to mechanical air transportation. The aviation industry includes a variety of institutions, such as military aviation companies, aircraft manufacturers, and various commercial establishments, all of which play important roles. The analysis of airline market shares was carried out within the realm of the aviation industry. Considering the ongoing trajectory of increasing airline market shares, it is crucial for firms to commit resources towards investing in this industry. Moreover, in reviewing the existing literature, it became evident that there is a dearth of studies undertaken in the field of airline marketing. The main aim of this study was to fill the current research void in the literature. This research examined several aspects like sustainable airport management and business, the airline industry, business-to-business analytics in the airline sector, customer happiness, and customer experience. In addition, the research aims to conduct a SWOT analysis of the airline marketing strategies used by transportation companies.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140684891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-16DOI: 10.34248/bsengineering.1445076
Aidana Sabitova, Gulnur Suleımanova, T. Kızıldeniz, A. Yetik
Barley stands as a cornerstone in agricultural landscape of Kazakhstan, weaving through diverse climate zones, and annually gracing over 1.5 million hectares. The intricate interplay between climate and food systems necessitates thorough analysis and strategic measures to food safety and nutritional security, as the evolving climate significantly influences both the quantity and quality of our food resources. This study aims to employ the LINTUL-MULTICROP Model to assess how spring barley adapts to both today’s climatic conditions and potential climate change scenarios to elevated levels of carbon dioxide and temperature under the specific conditions of southeast of Almaty. Three different global climate change models were studied (GCMs); i) GFDL-ESM2M, ii) HadGEM2-AO, and iii) MPI-ESM-MR for historical period (1986-2005) under RCP 4.5 and RCP 8.5 during the periods of i) 2040-2059 years scenarios, ii) 2060-2079 years scenarios, and iii) 2080-2099 years scenarios. Overall, the HADGEMAO and MPIESMMR models exhibited promising results in simulating yield, projecting an increase in spring barley yield for both RCP4.5 and RCP8.5 scenarios in GFDL-ESM2M model case also demonstrated stable increase in rainfed conditions. In conclusion, it should be noted that in the conditions of Kazakhstan, the cultivation of spring barley tends to change to growth in the southeast of Almaty.
{"title":"Modeling Climate Change Scenarios for Spring Barley in Southeast of Almaty in Kazakhstan Using the LINTUL Approach","authors":"Aidana Sabitova, Gulnur Suleımanova, T. Kızıldeniz, A. Yetik","doi":"10.34248/bsengineering.1445076","DOIUrl":"https://doi.org/10.34248/bsengineering.1445076","url":null,"abstract":"Barley stands as a cornerstone in agricultural landscape of Kazakhstan, weaving through diverse climate zones, and annually gracing over 1.5 million hectares. The intricate interplay between climate and food systems necessitates thorough analysis and strategic measures to food safety and nutritional security, as the evolving climate significantly influences both the quantity and quality of our food resources. This study aims to employ the LINTUL-MULTICROP Model to assess how spring barley adapts to both today’s climatic conditions and potential climate change scenarios to elevated levels of carbon dioxide and temperature under the specific conditions of southeast of Almaty. Three different global climate change models were studied (GCMs); i) GFDL-ESM2M, ii) HadGEM2-AO, and iii) MPI-ESM-MR for historical period (1986-2005) under RCP 4.5 and RCP 8.5 during the periods of i) 2040-2059 years scenarios, ii) 2060-2079 years scenarios, and iii) 2080-2099 years scenarios. Overall, the HADGEMAO and MPIESMMR models exhibited promising results in simulating yield, projecting an increase in spring barley yield for both RCP4.5 and RCP8.5 scenarios in GFDL-ESM2M model case also demonstrated stable increase in rainfed conditions. In conclusion, it should be noted that in the conditions of Kazakhstan, the cultivation of spring barley tends to change to growth in the southeast of Almaty.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140698199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-07DOI: 10.34248/bsengineering.1403554
Furkan Göktaş
Sustainable investment is a hot topic of portfolio selection. This study aims to examine sustainable portfolio selection for conservative investors. Thus, we propose a two-stage hybrid approach based on two-player zero-sum games. In the first stage, we use a fuzzy multi-criteria decision making (MCDM) approach to calculate the sustainability scores of the stocks based on expert knowledge. In the second stage, we form and solve a linear optimization problem by only adding a sustainability constraint to Young’s minimax portfolio selection model. We illustrate the hybrid approach using the weekly simple returns of eight stocks. We also compare our results with the results of Young’s minimax portfolio selection model.
{"title":"A Game-Theoretical Integrated Approach for Sustainable Portfolio Selection: An Application on BIST Participation Sustainability Index Stocks","authors":"Furkan Göktaş","doi":"10.34248/bsengineering.1403554","DOIUrl":"https://doi.org/10.34248/bsengineering.1403554","url":null,"abstract":"Sustainable investment is a hot topic of portfolio selection. This study aims to examine sustainable portfolio selection for conservative investors. Thus, we propose a two-stage hybrid approach based on two-player zero-sum games. In the first stage, we use a fuzzy multi-criteria decision making (MCDM) approach to calculate the sustainability scores of the stocks based on expert knowledge. In the second stage, we form and solve a linear optimization problem by only adding a sustainability constraint to Young’s minimax portfolio selection model. We illustrate the hybrid approach using the weekly simple returns of eight stocks. We also compare our results with the results of Young’s minimax portfolio selection model.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140733571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-02DOI: 10.34248/bsengineering.1351863
Rukiye Uzun Arslan, Ziynet Pamuk, Ceren Kaya
The liver, a life-sustaining organ, plays a substantial role in many body functions. Liver diseases have become an important world health problem in terms of prevalence, incidences, and mortalities. Liver fibrosis/cirrhosis is great of importance, because if not treated in time liver cancer could be occurred and spread to other parts of the body. For this reason, early diagnosis of liver fibrosis/cirrhosis gives significance. Accordingly, this study investigated the performances of different machine learning algorithms for prediction of liver fibrosis/cirrhosis based on demographic and blood values. In this context, random forest, k nearest neighbour and C4.5 decision tree algorithms were used and these algorithms were implemented on WEKA data mining tool. The obtained results revealed out that random forest algorithm outperformed in term of all evaluation metrics (90.91% accuracy, 90% specificity, 90% precision, 91.8% recall, 0.909 F-measure and 0.962 ROC) as compared with other algorithms.
{"title":"Usage of Weka Software Based on Machine Learning Algorithms for Prediction of Liver Fibrosis/Cirrhosis","authors":"Rukiye Uzun Arslan, Ziynet Pamuk, Ceren Kaya","doi":"10.34248/bsengineering.1351863","DOIUrl":"https://doi.org/10.34248/bsengineering.1351863","url":null,"abstract":"The liver, a life-sustaining organ, plays a substantial role in many body functions. Liver diseases have become an important world health problem in terms of prevalence, incidences, and mortalities. Liver fibrosis/cirrhosis is great of importance, because if not treated in time liver cancer could be occurred and spread to other parts of the body. For this reason, early diagnosis of liver fibrosis/cirrhosis gives significance. Accordingly, this study investigated the performances of different machine learning algorithms for prediction of liver fibrosis/cirrhosis based on demographic and blood values. In this context, random forest, k nearest neighbour and C4.5 decision tree algorithms were used and these algorithms were implemented on WEKA data mining tool. The obtained results revealed out that random forest algorithm outperformed in term of all evaluation metrics (90.91% accuracy, 90% specificity, 90% precision, 91.8% recall, 0.909 F-measure and 0.962 ROC) as compared with other algorithms.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140754467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-19DOI: 10.34248/bsengineering.1421571
Ahmet Erdoğan, İ. G. Aksoy, S. Canbazoğlu
This study investigates the aeroacoustic behaviors of a square truncated perforated diffuser under airflow, commonly used in Air Handling Units (AHUs). The design parameters are fundamentally taken into account to unveil the aeroacoustic performance of the diffuser. Initially, unsteady-state Computational Fluid Dynamics (CFD) simulations are conducted based on models that accurately represent the fluid domain of the chamber with the perforated diffuser in the ANSYS Fluent environment. Subsequently, the Ffowcs Williams and Hawkings (FW-H) method integrated into the software is employed to acquire time-dependent signals from microphones placed in three different locations within a perforated diffuser chamber. Finally, by converting the results to a frequency range of 0-1000 Hz by Fast Fourier Transform (FFT) method and sound pressure level (SPL) values are obtained. Finally, the results are converted to a frequency range of 0-1000 Hz using the Fast Fourier Transform (FFT) method, and the SPL values are obtained. The results show that the microphone location is crucially important to determine SPL and the porosity reduction from 0.55 to 0.35 can reduce SPL by approximately 30-40 dB. Variations in wall thickness of the diffuser fluctuated between 5-10 dB at each frequency value.
{"title":"Effects of Geometric Parameters of Perforated Diffuser on Sound Pressure Level Sourced By Airflow","authors":"Ahmet Erdoğan, İ. G. Aksoy, S. Canbazoğlu","doi":"10.34248/bsengineering.1421571","DOIUrl":"https://doi.org/10.34248/bsengineering.1421571","url":null,"abstract":"This study investigates the aeroacoustic behaviors of a square truncated perforated diffuser under airflow, commonly used in Air Handling Units (AHUs). The design parameters are fundamentally taken into account to unveil the aeroacoustic performance of the diffuser. Initially, unsteady-state Computational Fluid Dynamics (CFD) simulations are conducted based on models that accurately represent the fluid domain of the chamber with the perforated diffuser in the ANSYS Fluent environment. Subsequently, the Ffowcs Williams and Hawkings (FW-H) method integrated into the software is employed to acquire time-dependent signals from microphones placed in three different locations within a perforated diffuser chamber. Finally, by converting the results to a frequency range of 0-1000 Hz by Fast Fourier Transform (FFT) method and sound pressure level (SPL) values are obtained. Finally, the results are converted to a frequency range of 0-1000 Hz using the Fast Fourier Transform (FFT) method, and the SPL values are obtained. The results show that the microphone location is crucially important to determine SPL and the porosity reduction from 0.55 to 0.35 can reduce SPL by approximately 30-40 dB. Variations in wall thickness of the diffuser fluctuated between 5-10 dB at each frequency value.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139958751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-16DOI: 10.34248/bsengineering.1402065
Muhammed Bora Akin
An evaporator system's solutions involve solving equations that incorporate both mass and energy balances. The process of solving a single-effect evaporator is simpler compared to multi-effect evaporator systems. However, due to the extensive analysis of diverse data from various tables, many turn to simulation programs for convenience. These programs offer the advantage of conducting calculations by utilizing their own data libraries containing thermodynamic and LLE-VLE data. To emulate the functionality of expensive simulation programs, an alternative interface was designed using Visual Basic for Applications (VBA) in MS Excel. In this particular study, a single-effect evaporator system, utilized for concentrating NaOH solution, was chosen and solved with a VBA-created program within MS Excel. Moreover, databases for saturated water and superheated steam data were developed within the MS Excel environment to facilitate the program. Ultimately, the program was employed to scrutinize the influence of selected parameters on other parameters, and the results were analyzed. This study serves as an illustration of how VBA in MS Excel can efficiently handle calculations pertaining to chemical engineering processes. By focusing on the single-effect evaporator, it showcases how VBA in Excel can simplify and comprehensively investigate such calculations in chemical engineering processes.
蒸发器系统的求解涉及到质量和能量平衡方程的求解。与多效蒸发器系统相比，单效蒸发器的求解过程较为简单。然而，由于需要对各种表格中的不同数据进行大量分析，许多人为了方便而求助于模拟程序。这些程序的优势在于可以利用自身包含热力学数据和 LLE-VLE 数据的数据库进行计算。为了模拟昂贵的模拟程序的功能，我们在 MS Excel 中使用 Visual Basic for Applications (VBA) 设计了一个替代界面。在这项特殊的研究中，我们选择了一个用于浓缩 NaOH 溶液的单效蒸发器系统，并在 MS Excel 中使用 VBA 创建的程序进行求解。此外，还在 MS Excel 环境中开发了饱和水和过热蒸汽数据数据库，以方便程序的运行。最后，利用该程序仔细检查了所选参数对其他参数的影响，并对结果进行了分析。本研究说明了 MS Excel 中的 VBA 如何有效地处理与化学工程过程有关的计算。本研究以单效蒸发器为重点，展示了 Excel 中的 VBA 如何简化和全面研究化学工程过程中的此类计算。
{"title":"Utilizing VBA in MS Excel for Simplified Solutions in Chemical Engineering: Single-Effect Evaporator Study","authors":"Muhammed Bora Akin","doi":"10.34248/bsengineering.1402065","DOIUrl":"https://doi.org/10.34248/bsengineering.1402065","url":null,"abstract":"An evaporator system's solutions involve solving equations that incorporate both mass and energy balances. The process of solving a single-effect evaporator is simpler compared to multi-effect evaporator systems. However, due to the extensive analysis of diverse data from various tables, many turn to simulation programs for convenience. These programs offer the advantage of conducting calculations by utilizing their own data libraries containing thermodynamic and LLE-VLE data. To emulate the functionality of expensive simulation programs, an alternative interface was designed using Visual Basic for Applications (VBA) in MS Excel. In this particular study, a single-effect evaporator system, utilized for concentrating NaOH solution, was chosen and solved with a VBA-created program within MS Excel. Moreover, databases for saturated water and superheated steam data were developed within the MS Excel environment to facilitate the program. Ultimately, the program was employed to scrutinize the influence of selected parameters on other parameters, and the results were analyzed. This study serves as an illustration of how VBA in MS Excel can efficiently handle calculations pertaining to chemical engineering processes. By focusing on the single-effect evaporator, it showcases how VBA in Excel can simplify and comprehensively investigate such calculations in chemical engineering processes.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139960765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-15DOI: 10.34248/bsengineering.1420277
Mahmut Kaplan
Proton exchange membrane fuel cells (PEMFCs) have great potential to produce renewable, sustainable and clean energy and reduce air pollutants to mitigate climate change. PEMFCs consist of distinct parts including anode and cathode bipolar plates having flow channels, gas diffusion layers, catalyst layers, and membrane. The flow channel geometry influences the the flow and pressure drop characteristics of the channel and cell performance. In this work, a three-dimensional (3D) CFD model is built employing SOLIDWORKS and ANSYS Workbench. The innovative configurations are generated by changing the half of 2 x 2 mm square channel to 0.3 x 0.1 mm, 0.3 x 0.15 mm, 0.3 x 0.2 mm and 0.3 x 0.25 mm rectangular section at the top. The results showed that increasing rectangular section height significantly reduced pressure drop at the anode and cathode with a slight decrease in the current density at 0.4 and 0.6 V. The new configuration with 0.2 x 0.1 mm half square section at the bottom and 0.3 x 0.25 mm rectangular section decreases the current density, anode and cathode pressure drop of 11%, 69% and 58% , respectively in comparison to 0.2 x 0.2 flow channel at 0.4 V. Taking into account pressure loss along the flow channels, this configuration is a good option to improve the cell performance.
质子交换膜燃料电池（PEMFCs）在生产可再生、可持续和清洁能源以及减少空气污染物以减缓气候变化方面具有巨大潜力。质子交换膜燃料电池由不同部分组成，包括具有流道的阳极和阴极双极板、气体扩散层、催化剂层和膜。流道的几何形状会影响流道的流量和压降特性以及电池性能。本研究采用 SOLIDWORKS 和 ANSYS Workbench 建立了三维 CFD 模型。通过将 2 x 2 毫米方形通道的一半改为顶部为 0.3 x 0.1 毫米、0.3 x 0.15 毫米、0.3 x 0.2 毫米和 0.3 x 0.25 毫米的矩形截面，产生了创新配置。结果表明，在 0.4 和 0.6 V 电压下，增加矩形截面高度可显著降低阳极和阴极的压降，但电流密度略有下降。与 0.2 x 0.2 流道相比，在 0.4 V 电压下，底部 0.2 x 0.1 毫米半方形截面和 0.3 x 0.25 毫米矩形截面的新配置可使电流密度、阳极和阴极压降分别降低 11%、69% 和 58%。考虑到流道沿线的压力损失，这种配置是提高电池性能的良好选择。
{"title":"CFD Investigation of Pressure Drop Reduction in PEMFC Flow Channels with Distinct Cross-Section Shapes","authors":"Mahmut Kaplan","doi":"10.34248/bsengineering.1420277","DOIUrl":"https://doi.org/10.34248/bsengineering.1420277","url":null,"abstract":"Proton exchange membrane fuel cells (PEMFCs) have great potential to produce renewable, sustainable and clean energy and reduce air pollutants to mitigate climate change. PEMFCs consist of distinct parts including anode and cathode bipolar plates having flow channels, gas diffusion layers, catalyst layers, and membrane. The flow channel geometry influences the the flow and pressure drop characteristics of the channel and cell performance. In this work, a three-dimensional (3D) CFD model is built employing SOLIDWORKS and ANSYS Workbench. The innovative configurations are generated by changing the half of 2 x 2 mm square channel to 0.3 x 0.1 mm, 0.3 x 0.15 mm, 0.3 x 0.2 mm and 0.3 x 0.25 mm rectangular section at the top. The results showed that increasing rectangular section height significantly reduced pressure drop at the anode and cathode with a slight decrease in the current density at 0.4 and 0.6 V. The new configuration with 0.2 x 0.1 mm half square section at the bottom and 0.3 x 0.25 mm rectangular section decreases the current density, anode and cathode pressure drop of 11%, 69% and 58% , respectively in comparison to 0.2 x 0.2 flow channel at 0.4 V. Taking into account pressure loss along the flow channels, this configuration is a good option to improve the cell performance.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139836051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-15DOI: 10.34248/bsengineering.1420277
Mahmut Kaplan
Proton exchange membrane fuel cells (PEMFCs) have great potential to produce renewable, sustainable and clean energy and reduce air pollutants to mitigate climate change. PEMFCs consist of distinct parts including anode and cathode bipolar plates having flow channels, gas diffusion layers, catalyst layers, and membrane. The flow channel geometry influences the the flow and pressure drop characteristics of the channel and cell performance. In this work, a three-dimensional (3D) CFD model is built employing SOLIDWORKS and ANSYS Workbench. The innovative configurations are generated by changing the half of 2 x 2 mm square channel to 0.3 x 0.1 mm, 0.3 x 0.15 mm, 0.3 x 0.2 mm and 0.3 x 0.25 mm rectangular section at the top. The results showed that increasing rectangular section height significantly reduced pressure drop at the anode and cathode with a slight decrease in the current density at 0.4 and 0.6 V. The new configuration with 0.2 x 0.1 mm half square section at the bottom and 0.3 x 0.25 mm rectangular section decreases the current density, anode and cathode pressure drop of 11%, 69% and 58% , respectively in comparison to 0.2 x 0.2 flow channel at 0.4 V. Taking into account pressure loss along the flow channels, this configuration is a good option to improve the cell performance.
质子交换膜燃料电池（PEMFCs）在生产可再生、可持续和清洁能源以及减少空气污染物以减缓气候变化方面具有巨大潜力。质子交换膜燃料电池由不同部分组成，包括具有流道的阳极和阴极双极板、气体扩散层、催化剂层和膜。流道的几何形状会影响流道的流量和压降特性以及电池性能。本研究采用 SOLIDWORKS 和 ANSYS Workbench 建立了三维 CFD 模型。通过将 2 x 2 毫米方形通道的一半改为顶部为 0.3 x 0.1 毫米、0.3 x 0.15 毫米、0.3 x 0.2 毫米和 0.3 x 0.25 毫米的矩形截面，产生了创新配置。结果表明，在 0.4 和 0.6 V 电压下，增加矩形截面高度可显著降低阳极和阴极的压降，但电流密度略有下降。与 0.2 x 0.2 流道相比，在 0.4 V 电压下，底部 0.2 x 0.1 毫米半方形截面和 0.3 x 0.25 毫米矩形截面的新配置可使电流密度、阳极和阴极压降分别降低 11%、69% 和 58%。考虑到流道沿线的压力损失，这种配置是提高电池性能的良好选择。
{"title":"CFD Investigation of Pressure Drop Reduction in PEMFC Flow Channels with Distinct Cross-Section Shapes","authors":"Mahmut Kaplan","doi":"10.34248/bsengineering.1420277","DOIUrl":"https://doi.org/10.34248/bsengineering.1420277","url":null,"abstract":"Proton exchange membrane fuel cells (PEMFCs) have great potential to produce renewable, sustainable and clean energy and reduce air pollutants to mitigate climate change. PEMFCs consist of distinct parts including anode and cathode bipolar plates having flow channels, gas diffusion layers, catalyst layers, and membrane. The flow channel geometry influences the the flow and pressure drop characteristics of the channel and cell performance. In this work, a three-dimensional (3D) CFD model is built employing SOLIDWORKS and ANSYS Workbench. The innovative configurations are generated by changing the half of 2 x 2 mm square channel to 0.3 x 0.1 mm, 0.3 x 0.15 mm, 0.3 x 0.2 mm and 0.3 x 0.25 mm rectangular section at the top. The results showed that increasing rectangular section height significantly reduced pressure drop at the anode and cathode with a slight decrease in the current density at 0.4 and 0.6 V. The new configuration with 0.2 x 0.1 mm half square section at the bottom and 0.3 x 0.25 mm rectangular section decreases the current density, anode and cathode pressure drop of 11%, 69% and 58% , respectively in comparison to 0.2 x 0.2 flow channel at 0.4 V. Taking into account pressure loss along the flow channels, this configuration is a good option to improve the cell performance.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139776387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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