Güncel Gönderiler: Makine Mühendisliği Bölümü
Toplam kayıt 159, listelenen: 101-120
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Estimation of monthly solar radiation distribution for solar energy system analysis
(Pergamon-Elsevier Science Ltd, 2011)The concept of probability density frequency, which is successfully used for analyses of wind speed and outdoor temperature distributions, is now modified and proposed for estimating solar radiation distributions for design ... -
Experimental thermal performance of a solar source heat-pump system for residential heating in cold climate region
(Pergamon-Elsevier Science Ltd, 2011)Solar source heat pump systems present tremendous environmental benefits when compared to the conventional systems for residential applications. In addition to not exhausting natural resources, their main advantage is, in ... -
A new approach for predicting cooling degree-hours and energy requirements in buildings
(Pergamon-Elsevier Science Ltd, 2011)This study develops a novel approach to predict the outdoor temperature fluctuations during daytime as a dimensionless temperature variation coefficient. In this approach, the daily outdoor temperature trend is established ... -
Energy analysis of hydrogen production using biogas-based electricity
(Pergamon-Elsevier Science Ltd, 2011)In this study, we perform energy analyses of hydrogen production with biogas-based electricity. In this study, a factory generating its own electricity from biogas obtained from wastewater treatment plant is considered for ... -
Hydrogen production probability distributions for a PV-electrolyser system
(Pergamon-Elsevier Science Ltd, 2011)In this study, we comprehensively analyze the probability distribution of the hydrogen production for PV assisted PEM electrolyser system. A case study is conducted using the experimental data taken from a recently installed ... -
Stress intensity anlaysis of biaxial stressed single elliptical hole in plate according to change of hole inclination and geometry
(Gazi Üniv, 2011)Discontinuities such as the holes in a finite plate under loading while the more stress concentrations around holes causes. Applied to the edges of plate and the different rates the principal stresses (sigma(1)/sigma(2)) ... -
An adaptive neuro-fuzzy inference system model for predicting the performance of a refrigeration system with a cooling tower
(Pergamon-Elsevier Science Ltd, 2011)This paper investigates the applicability of adaptive neuro-fuzzy inference system (ANFIS) to predict the performance of an R134a vapor-compression refrigeration system using a cooling tower for heat rejection. For this ... -
Energy analysis of different types of buildings in Gonen geothermal district heating system
(Pergamon-Elsevier Science Ltd, 2011)Turkey is one of the top five countries for geothermal direct applications. However, in the space heating applications, a considerable amount of geothermal energy is wasted through the low thermal quality building envelopes. ... -
Modified exergoeconomic modeling of geothermal power plants
(Pergamon-Elsevier Science Ltd, 2011)In this study, a modified exergoeconomic model is proposed for geothermal power plants using exergy and cost accounting analyses, and a case study is in this regard presented for the Tuzla geothermal power plant system ... -
Thermoeconomic analysis of farıne mill in dry type cement production
(Turkish Assoc Thermal Sciences Technology, 2010)Thermoeconomics is the cost analysis based on the cost and exergy calculations which are used to determine the potential of unproductiveness in all of the thermal systems. This approach is also defined as 'exergy cost' and ... -
A new parameter for comparison of flue gas enthalpy values: flue gas petrol equivalence coefficient
(Nova Science Publishers, 2010)In this paper, a new parameter is proposed to comparison of the flue gas enthalpy values of the some common fossil fuels and biomass. The new parameter is called as flue gas petrol equivalence coefficient (FGPEC). Flue gas ... -
Buckling analysis of laminated composite plates with an elliptical/circular cutout using FEM
(Elsevier Sci Ltd, 2010)In this study, a buckling analysis was carried out of a woven-glass-polyester laminated composite plate with an circular/elliptical hole, numerically. In the analysis, finite element method (FEM) was applied to perform ... -
High-speed milling strategies in mould manufacturing
(Carl Hanser Verlag, 2010)High-speed cutting is one of the key issues in mould manufacturing. But to apply high-speed milling to mould manufacturing, unlike conventional milling, it is necessary to define specific cutting parameters. This article ... -
An investigation on weldability of AISI 304 and AISI 1040 steels on friction welding
(Carl Hanser Verlag, 2010)In welding technology, joining processes of different materials, which have dissimilar crystal structures are difficult. Welding of different materials becomes very important to reduce costs. Furthermore, the friction ... -
A novel approach to degree-hour calculation: ındoor and outdoor reference temperature based degree-hour calculation
(Pergamon-Elsevier Science Ltd, 2010)This paper presents a novel approach to temperature probability density distribution and function. Probability density functions and frequency are successfully used in wind speed and solar energy analyses in literature. ... -
Mathematical modeling of heat recovery from a rotary kiln
(Pergamon-Elsevier Science Ltd, 2010)In this study, heat recovery from rotary kiln was examined for a cement plant in Turkey. At first, an exergy analysis was carried out on the operational data of the plant. Results indicated the presence of 217.31 GJ of ... -
FEM analysis of laminated composite plate with rectangular hole and various elastic modulus under transverse loads
(Elsevier Science Inc, 2010)The aim of this work is to predict the expansion of the plastic zone and residual stresses in layers of fiber-reinforced, thermoplastic laminated composite plates with rectangular hole. The effects of the material properties ... -
Energetic and exergetic performance evaluation of the quadruple-effect evaporator unit in tomato paste production
(Pergamon-Elsevier Science Ltd, 2010)Quadruple-effect evaporator units are commonly used in food focus area in sector is evaporative unit. It consumes about 60% of total energy input. The present study evaluates the performance of quadruple-effect evaporator ... -
Finite element analysis of collapse of front side rails with new types of crush initiators
(Korean Assoc Automotive Engineers- KSAE, 2009)Today's vehicles are designed with lighter weight to increase performance and to lower fuel consumption, while at the same time meeting the demands of safety requirements. Reducing the cross-section of structural elements ...
