Faculty of Engneering and Architecture

Energy efficiency in heating, ventilating, and air-conditioning (HVAC) systems is a primary concern in process projects, since the energy consumption has the highest percentage in HVAC for all processes. Without sacrifice of thermal comfort, to reset the suitable operating parameters, such as the humidity and air temperature, would have energy saving with immediate effect. In this paper, the simulation-optimization approach described the effective energy efficiency for HVAC systems which are used in industrial process. Due to the complex relationship of the HVAC system parameters, it is necessary to suggest optimum settings for different operations in response to the dynamic cooling loads and changing weather conditions during a year. Proportional-integral-derivative (PID) programming was developed which can effectively handle the discrete, nonlinear and highly constrained optimization problems. Energy efficiency process has been made by controlling of alternative current (AC) drive...

In this study, the aerodynamic characteristics (Fd, Fl, Cd, Cl) for models in 9 different geometry have been determined experimentally. In order to determine aerodynamic coefficients depending on drag and lift force for each geometry, open circuit and suction type wind tunnel has been used. Wind tunnel test section has 20 cm x 21 cm cross section and 48 cm length, and maximum air flow velocity is 12.5 m/s. The experiments have been performed at different air flow velocity for each model. The variation of drag and lift force with air velocity, and the variation of aerodynamic coefficients with Reynolds number have been investigated for models. The change in geometry that the effects on the drag and lift forces and aerodynamic coefficients have been determined. Because of the lower air flow velocity of the studied wind tunnel, low Reynolds values has been achieved. For this reason, the higher capacity wind tunnel has been needed for obtain stable aerodynamic coefficient values.

Increasing attention has been given to energy utilization in Turkey. In this report, we present an energy efficiency evaluation and economic feasibility analysis of a geothermal heating and cooling system (GSHP) and a mechanical compression water chiller system (ACHP) to improve the energy utilization efficiency and reduce the primary energy demand for industrial use. Analyses of a mechanical water chiller unit, GSW 180, and geothermal heating and cooling system, EAR 431 SK, were conducted in experimental working areas of the office buildings in a cigarette factory in Mersin, Turkey. The heating and cooling loads of the cigarette factory building were calculated, and actual thermal data were collected and analyzed. To calculate these loads, the cooling load temperature difference method was used. It was concluded that the geothermal heating and cooling system was more useful and productive and provides substantial economic benefits.

Bu çalışmada kompleks koaservasyon metodu kullanılarak UV koruyucu özellikli mikrokapsül üretimi ve kumaşa aktarılması amaçlanmıştır. Bu amaç için Arap zamkı ve Etil selüloz çeper madde olarak, β-karoten ve çay ektresi çekirdek malzeme olarak kullanılmıştır. Beş farklı çalışma denenmiş olup sonuçlar SEM ve Spektrofotometre ile ölçülmüştür.

Good HVAC control is often the most cost-effective option to improve the energy efficiency of a factory. The effect of the control strategy and energy efficiency is usually difficult to predict. To achieve this easily, a fully automated energy saving controller system was designed for heating, ventilating and airconditioning (HVAC) systems in textile factories. The new designed HVAC control system reduces the energy consumption by 45%. These control system can be implemented in the factories with a direct payback period approximately 4 months.

In this study, the aerodynamic characteristics (F d , F l , C d , C l ) for models in 9 different geometry have been determined experimentally. In order to determine aerodynamic coefficients depending on drag and lift force for each geometry, open circuit and suction type wind tunnel has been used. Wind tunnel test section has 20 cm x 21 cm cross section and 48 cm length, and maximum air flow velocity is 12.5 m/s. The experiments have been performed at different air flow velocity for each model. The variation of drag and lift force with air velocity, and the variation of aerodynamic coefficients with Reynolds number have been investigated for models. The change in geometry that the effects on the drag and lift forces and aerodynamic coefficients have been determined. Because of the lower air flow velocity of the studied wind tunnel, low Reynolds values has been achieved. For this reason, the higher capacity wind tunnel has been needed for obtain stable aerodynamic coefficient values...

In this study, Turkey is separated 3 climate zone and Kahramanmaras is a province located in 2nd Climate region. The thermal insulation is applied to the sample building apartment flats and self-contained apartment buildings to invastigate the insulation of the annual fuel costs impact on the revealed cost analysis were studied. As a result of the fuel cost calculation, the annual heating energy savings is up to 80 percent has been reached in the apartments and self-contained apartments which are designed insulated,.

This paper investigates the Nano-fluid for a non-isothermal channel flow under the effect of a constant pressure gradient acting along the channel axis. Two-dimensional, non-isothermal, steady flow of an incompressible fluid in a channel is taken into consideration. Upper and lower walls of the channel are kept at the same constant heat flux. To consider the effect of conductivity and viscosity, Maxwell and Brinkman's models are used respectively. The effects of volume fraction, pressure gradient and Reynolds numbers on velocity and temperature profiles are discussed for the Nano-fluid Alumina. Water is used as a base fluid. The comparisons of the flow characteristics, including the distributions of velocity, temperature and volumetric flow rate of aluminum oxide are also given in the paper. Shear stress distribution along the channel axis and pressure gradient for different volume fraction are presented as well. Discretization is performed using a Pseudospectral technique based on Chebyshev polynomial expansions. The resulting nonlinear, coupled boundary value problem is solved iteratively using Chebyshev pseudospectral method.

Döşemeden ısıtma sistemleri dünya çapında yaygın olarak kullanılmaktadır. Bu çalışmada döşemeden ısıtma sistemlerinin güneş enerji desteğiyle Ankara için kullanılabilirliği incelenecektir. Bu inceleme çerçevesinde ısıl konfor analizleri yapılmıştır. Bu analizler Ankara'da bulunan 23 m²'lik bir odada yapılmıştır. Oda döşemeden güneş enerjisi yardımıyla ısıtılmaktadır. Fanger'in PMV ve PPD yöntemleri bu odada ısıl konfor analizi için kullanılmıştır. Bu çalışma güneş enerjisi ile döşemeden ısıtma sistemlerinin durumuna Ankara'nın yerel koşullarda odaklanacaktır.

Many vehicle manufacturers have started up the development and production of electric vehicles reducing in response to climate change, increasing air pollution and exhaust emission problems. In addition, the most important of the difficult problems associated with electric vehicles is the high cost caused by the use of a large number of batteries and the use of a limited number of batteries negatively affects the driving distance of the car. The limitations caused by the battery problems are not only to increase the cost but also increase vehicle load because it takes up too much space and limits the usage area of the vehicle. In order to address these problems, electric vehicle manufacturers have tried to find a way to reduce the weight of the vehicle body. Therefore, to reduce weight, it would be more accurate to use light metal alloys that could get better results than using polymer composites in this study 6063 series aluminum alloy box and tube profiles were used as chassis mat...

Dünyada enerjiye olan ihtiyaç sürekli olarak artarken, enerjinin tasarruflu kullanımı da öne çıkmaktadır. Enerji ihtiyacını karşılamak için kullanılan fosil kaynaklı yakıtların yakın bir gelecekte tükenme olasılığı ve sanayileşmenin belirli bölgelerde yoğunlaşması çevre kirliliğini artırmaktadır. Bu durum, enerji geri kazanımına ve yenilenebilir enerji kaynaklarının yaygınlaşmasına yol açmaktadır. Enerjinin tasarruf yöntemlerinden birisi de ısıl sistemlerin enerji ve ekserji analizinin yapılarak performansının değerlendirilmesi ve sistemlerin verimini artırıcı iyileştirmeler yapılmasıdır. Enerji analizi ve ekserji analizi ısıl sistem uygulamalarının performansını belirlemede en etkili yoldur. Enerji analizi, sistemin nicel enerji potansiyeliyle ilgili bilgi verirken, ekserji analizi de sistemlerin nitel performanslarını hesaplamada ve enerji kayıplarının olduğu noktaları belirlemede etkili bir yöntemdir. Ekserji analizi, sistemin kullanılabilir enerji değerini hesaplamada kullanılır. Yani bir sistemde verimin arttırılması için gerekli önlemlerin alınması ekserji analizinin uygulanmasını gerektirir. Boylerin enerji ve ekserji analizini yapmışlardır. Bir termik santralinin performansını hesaplamak için enerji ve ekserji analizi yapmıştır. Bir kazan sisteminde hesaplanan enerji ve ekserji kayıplarını, yaptıkları enerji ve ekserji analizine göre ortaya koymuşlardır. Bir petrol rafinerisinde ekserji kayıplarını hesaplayarak sonuçları, daha etkili iyileştirmeler yapmak için kullanmıştır. Bir enerji

Bu çalışma, bir kanal içerisinde basınç gradyeni altındaki newtoniyen olmayan bir akışkanın kararlı, izotermal olmayan basınç etkisi altındaki akışının basınç gradyeni - debi ilişkisini viskoz ısınma etkisini de hesaba katarak incelemektedir. Akışkanın viskozitesi hem sıcaklığa hem de kayma oranına bağlıdır. Akışkanın newtoniyen olmayan davranışı Carreau reoloji bağıntıları ile modellenmiştir. Akış modelinin birbirine bağımlı hareket ve enerji denge denklemleri, lineer olmayan sınır değer problemi olarak elde edilmiş ve problem Chebyshev polinomlarını esas alan pseudospectral metot kullanılarak ardışık noktalar metodu ile çözülmüştür. Aktivasyon enerji parametresi, Brinkman sayısı ve diğer parametrelerin  akış üzerindeki etkisi incelenmiştir.Anahtar Kelimeler: Brinkman sayısı ,izotermal olmayan akış, newtoniyen olmayan akışkanIn this study the pressure gradient-flow rate relationship for steady-state nonisotherm...

Sandwich composite structures are commonly used in different areas such as aerospace, marine, space, architectural structures where high strength and stiffness are required as well as the weight is a critical problem. Mechanical properties of the sandwich panels were affected by facesheets type, facesheet density and dimensions of the core materials. In this study, different thicknesses of PVC (polyvinyl chloride) foams were used as corepart of sandwich panels. PVC foam cores and sandwich composites with unidirectional and biaxial carbon fiber fabric face sheets were produced using vacuum infusion method and strength of the panels which have different fiber orientations were compared with 3point bending and compression tests. Also, the effect of core thickness on core shear stress and flexural strength was investigated by using core materials of different thickness PVC foam. As a result, directions of fiber in facesheets was observed to be an important parameter in face strength. It was obtained that increasing the thickness of the core in the sandwich panels decreased the flexural and compressive strength of sandwich composites.

In our world, where the need for energy increases every year, the interest in investment in renewable energy sources is increasing as primary energy sources are decreasing rapidly. Kahramanmaraş comes first among the provinces that receive more sun compared to the rate of sunshine in Turkiye. Menzelet, which receives solar radiation with an annual rate of 1800-2000 kWh/m²-year, is located in a valuable region in terms of its potential to convert solar radiation into electrical energy due to its geographical structure. For this reason, a system that pays for itself in 4.4 years has been developed by analyzing the installation costs and cash flow of the 3 MW floating photovoltaic solar power plant project to be installed in the Menzelet dam lake.

TEZ11854Tez (Yüksek Lisans) -- Çukurova Üniversitesi, Adana, 2016.Kaynakça (s. 113-116) var.viii, 117 s. : res. (bzs. rnk.), tablo ; 29 cm.Bu çalışmada geleneksel konut mimarsinin ilk evre özeliklerini taşıyan kırsal mimarinin plan şekillenişi, kullanılan yapı malzemesi ve yapım tekniği ile ilgili bilgiler araştırılmıştır. Alan çalışması olarak seçilen Konya ili üzerinden önce şehrin genel yapısı, tarihi ve kültürel değerleri ile ilgili açıklamalar yapılmış, devamında ise kırsal yapı karakterini koruyan Halkapınar ilçesindeki kerpiç konutlar üzerinden bölgenin mimari biçimlenişi ile ilgili özellikler incelenmiştir. Çalışma alanının daha önce incelenmemiş olması nedeniyle öncelikle yerinde inceleme yapılıp, kırsal biçimleniş gösteren yapılar belirlenmiştir. Seçilen konutların ölçümleri alınmış, ev sahipleri ile görüşmeler yapılmış ve bu bilgiler fotoğraflarla desteklenmiştir. Son olarak incelenen konutların ayrık ve bitişik düzen oluşumu, plan biçimlenişi ve servis alanları ile ilişk...