ARCENG (INTERNATIONAL JOURNAL OF ARCHITECTURE AND ENGINEERING) ISSN: 2822-6895

EXPLORING CHARPY IMPACT AND HARDNESS TESTING OF CARBON NANOFIBER-REINFORCED EPOXY COMPOSITES WITH VARIED WEIGHT PERCENTAGES

2024-05-27T15:54:24+03:00

ABSTRACT

This study encompasses research involving Charpy impact tests and hardness tests conducted to determine the mechanical properties of carbon nanofiber (CNF) reinforced samples used in epoxy matrix materials for composite structures. The utilization of CNFs as filler materials to enhance the mechanical strength of composite structures holds significant importance, particularly in industries demanding advanced technologies such as aerospace, space exploration, automotive, and marine engineering. This study evaluates the mechanical properties of epoxy composites with varying concentrations of CNF additives, presenting the comparative results of Charpy impact tests and hardness tests.

The results of the Charpy impact tests indicate that epoxy composites with 0.8 wt % CNF additives demonstrate the highest performance, whereas those with 1.2 wt % CNF additives exhibit the lowest performance. Similarly, the outcomes of the hardness tests corroborate that epoxy composites with 1.2 wt % CNF additives possess the lowest hardness values.

This study contributes to understanding CNF-reinforced epoxy composites' mechanical properties and emphasizes their potential in industrial applications. Furthermore, focusing on standard test methods for determining the mechanical properties of CNF-reinforced epoxy composites provides guidance for future research in this field.

AN INTEGRATED BUSINESS MODEL INVOLVING HIGH-QUALITY PLASTIC PRODUCTION WITH RECYCLING: A QUALITATIVE STUDY ON SÖNMEZ GLOBAL PLASTIC COMPANY

2024-05-26T19:19:34+03:00

In Turkey and around the world, efforts are underway to create projects and implement legal regulations aimed at converting plastic waste into useful materials instead of allowing it to contaminate the environment.It is observed that the concept of "sustainable business model" is not examined in the literature. Gaining a sustainable competitive advantage in the sector is crucial for the well-being of both the industry and the national economy. The aim of this research article is to develop a sustainable business model by gaining a competitive advantage in local and national markets in the plastic industry. Sönmez Plastik enterprise in Gaziantep region is taken as an example of recycling and plastic recovery practices. The research findings support the anticipation of reducing environmental impacts by producing new products through plastic recycling. Business owners are increasingly focusing on environmental factors and striving to protect the environment by using waste plastics as raw materials or converting them into different products.

SMART AND GREEN TECHNOLOGİES IN BUILDING AND URBAN PLANNİNG

2024-02-17T21:57:12+03:00

The technological development that is increasing in the world has its influence on all sectors. One of these areas is the tourism industry. Effective use of technological capabilities is important for providing the best urban planning in tourism. The paper aims to study the use potentials of smart and green technologies in the urban planning of tourist complexes.

Currently, the main goal of developing tourism in the region is to make tourism one of the leading areas of the economy. As it is known tourism is one of the most profitable areas in the world. Azerbaijan has enough favorable potentials and opportunities for the development of tourism. It is possible to turn tourism into the most developed industry within the conditions of effective and correct use of smart and green technologies. There are natural, geographical, technological, social, and other factors that encourage the development of tourism.

The article shows the importance of the transition from traditional technologies to green technologies in projects implemented in the sustainable modern construction sector. Also, it identifies important factors and problems in the use of green technologies in urban planning. The criteria that make a building “green” are discussed. The impact of “green” construction on the environment, ecology, and economy is analyzed. Sustainable design principles are proposed using the example of tourist complexes in the Sheki - Zagatala economic region of the Republic of Azerbaijan.

A CIRCULAR ECONOMY POLICIES IN ITALY AND POLAND

2024-05-29T15:41:52+03:00

ABSTRACT

CIRCULAR ECONOMY POLICIES IN ITALY AND POLAND

Hamza KORKMAZ

Political Economics 2024, 44 pages

The world economy rises in the energy sector; with its strategic leadership in economic growth. While global development and population increase continues, the demand and need for energy scale up. This is the end of the “below average growth” era. With the impact of developing technology, renewable energy cost goes down and the transformation process is sped up by government incentives for environmentalist energy production. But; it seems that for long years, still, fossil fuels system will continue. Developments in fossil fuel-possessing countries, especially oil, have a direct impact on energy prices. As a result; the global trend for energy demand is towards clean (green) energy sources. The fight against CO2 release and climate change will become more important. Although in the predictable future, the supremacy of fossil fuels will continue; government policies and incentives will be shaped in support of works to minimize their negative impacts on nature. Demand for energy and natural resources has been increasing due to economic and population growth. Over recent years, the country has experienced the fastest surge in energy demand among OECD countries, and according to the International Energy Agency (IEA) forecasts is set to double its energy use over the next decade. will provide value to literature by increasing the importance of renewable energy sources for nature, humans, and the world. The study aims to reveal whether there is a bidirectional interaction between the renewable energy production of countries in Italy and Poland and their gross domestic product. In this study, the relationship between renewable energy production and gross domestic product was investigated bidirectionally.

Keywords: Energy, Sustainable Development, Renewable Energy, Natural Resource Economics

Jel Codes: F53 International Agreements and Observance . International Organizations, G18 Government Policy and Regulation, O1 Economic Development, Q2 Natural Resources including Energy, Natural Resources Renewable, Z13 Economic Sociology . Economic and Social Stratification,

DEFINITION OF CARBON/CARBON (C/C) COMPOSITE MATERIAL FOR JET ENGINE TURBINE BLADE MODEL IN ANSYS AND EVALUATION OF THERMAL ANALYSIS RESULTS: CALCULATION OF FLOW, PRESSURE, AND EFFICIENCY VALUES IN MATLAB

2024-05-26T23:03:27+03:00

In the design of jet engine turbine blades, various analysis methods such as SOLIDWORKS and ANSYS are used in the literature. The nozzle and temperature analysis of jet engine turbine blades play a crucial role in evaluating the engine's performance, efficiency, and durability. This research article; investigates how carbon/carbon (C/C) composite materials and design parameters (temperature, pressure, and nozzle velocity) affect the durability and performance of turbine blades. A three-dimensional solid model of the turbine blade was created using the ANSYS program. Subsequently, temperature effects were calculated using the MATLAB program. Initially, the C/C composite material assignment was made. Then, temperature values were taken in Kelvin (K) units in the MATLAB program. Three different temperature values, 979.02 K, 1395.62 K, and 3195.62 K, were entered. It was observed that the C/C composite material withstands high temperatures well. In turbine jet engines, an increase in temperature was observed to increase turbine nozzle velocity.

GENETİK ALGORİTMA İLE DAĞITIK ENERJİ SİSTEMLERİNİN MODELLENMESİ

2024-03-27T14:25:30+03:00

Dağıtık Enerji Sistemleri (DES), küçük yerel ünitelerde elektrik enerjisi ile birlikte ısıtma ve soğutma enerjilerini de bir arada üretebilirler. Kojenerasyon (ikili üretim, ısı ve elektrik enerjisi) veya trijenerasyon (üçlü üretim, ısıtma, soğutma ve elektrik enerjisi) sistemleri ile eş zamanlı enerji üretiminden yüksek termodinamik verim ve birincil enerji tasarrufu sağlanmaktadır. Son kullanıcıların yakınında konumlandırılan enerji üretim üniteleri ile de enerji iletim kayıpları önemli ölçüde azaltılabilmektedir. Ayrıca bu sistemler, yerel yenilenebilir enerji kaynaklarından da (örneğin güneş, rüzgâr ve biokütle) yararlanma fırsatı sunarak enerji üretim sistemlerine esneklik katmaktadırlar. Matematiksel modelleme, DES'lerin optimum tasarımı için sıklıkla tercih edilen bir yaklaşımdır. Ancak NP-zor yapısındaki bu ağ tasarımı ve atama modellerinde değişken sayısı arttıkça model karmaşıklaşmaktadır. Dağıtık enerji sistemlerinin altyapı ihtiyaçlarını dikkate alan sürdürülebilir kentsel planlama için genel bir çerçeve öneren matematiksel modelde, özellikle talep noktası sayısı ve kapsama mesafesi arttıkça çözüm süresinin uzadığı görülmüştür. Bu çalışmada, bölgesel ölçekli dağıtık enerji üretim noktalarının atanması ve ısıtma/soğutma ağının optimum tasarımı için geliştirilen matematiksel modele alternatif olarak sezgisel bir algoritma önerilmektedir. Enerji dağıtım kayıplarını ve taşıma maliyetlerini azaltmak amacıyla önerilen kapasiteli sabit maliyetli yer seçimi modeline, arz ve talep noktaları arasındaki olabilecek en büyük mesafenin de dikkate alındığı maksimum kapsama mesafesinin entegre edilmesiyle oluşturulan matematiksel modelin çözüm sonuçları, sezgisel algoritma ile elde edilen sonuçlarla karşılaştırılmıştır. Bu bağlamda, daha kısa çözüm süresinde optimuma yakın çözümler elde etmek amacıyla genetik algoritma temelli bir çözüm yöntemi geliştirilerek elde edilen sonuçlar değerlendirilmiştir.

KAHVE İÇİM SEKTÖRÜNDE HİZMET KALİTESİNE YÖNELİK BETİMLEYİCİ BİR ÇALIŞMA

2024-02-13T10:08:37+03:00

Son yıllarda hem dünyada hem de ülkemizde kahve işletmeleri, popüler tüketim kültürünün merkezine yerleşmiştir. Bu işletmeler, hızlı hizmet ve uygun fiyatlar sunarak genellikle genç tüketici grubu tarafından tercih edilmektedir. Bu genç tüketici grubu, pazarlama ve tüketici davranışı açısından önemli bir araştırma konusu olup Z kuşağı olarak adlandırılmaktadır. Araştırmanın amacı, Z kuşağının tercihleri arasında bulunan iki kahve işletmesinin hizmet kalitesini betimsel olarak değerlendirmektir. Bu amaç doğrultusunda Gaziantep merkezinde bulunan Starbucks ve Gönül Kahvesi'nden ürün satın alan Z kuşağı tüketicilere çevrimiçi anket uygulanmıştır. Her iki markanın olumlu ve olumsuz pbyönleri belirlenmiş ve geliştirmeye açık yönleri için önerilerde bulunulmuştur.