Güncel Gönderiler: Makine Mühendisliği Bölümü Koleksiyonu
Toplam kayıt 286, listelenen: 221-240
-
Parametric study of exergetic sustainability performances of a high altitude long endurance unmanned air vehicle using hydrogen fuel
(Pergamon-Elsevier Science Ltd, 2016)Exergetic sustainability performances such as, exergy efficiency, waste exergy ratio, environmental effect factor and exergetic sustainability index of a HALE UAV were investigated parametrically. the UAV and its high ... -
Exergetic sustainability improvement potentials of a hydrogen fuelled turbofan engine UAV by heating its fuel with exhaust gasses
(Pergamon-Elsevier Science Ltd, 2016)Exergetic sustainability parameters such as, exergy efficiency, waste exergy ratio, environmental effect factor and exergetic sustainability index were investigated for an UAV having a turbofan engine for the case its ... -
Exergoenvironmental and exergoeconomic analyses of a vertical type ground source heat pump integrated wall cooling system
(Pergamon-Elsevier Science Ltd, 2016)In this study, exergoenvironmental, and exergoeconomic analyses of wall cooling systems fed by a vertical type of ground source heat pump integrated wall cooling system for cooling were examined experimentally and theoretically ... -
Investigation of micro-tube solid oxide fuel cell fabrication using extrusion method
(Pergamon-Elsevier Science Ltd, 2016)Extrusion is one of the most effective and inexpensive methods used in the production of ceramic tubes for tubular or micro-tubular solid oxide fuel cell (SOFC) applications. in this method, the parameters such as the ... -
Investigation of temperature distribution and performance of SOFC short stack with/without machined gas channels
(Pergamon-Elsevier Science Ltd, 2016)Solid oxide fuel cells (SOFCs) generate clean energy via electrochemical reactions at high operating temperatures. the distribution of the electrochemical reactions in the cell depends on the flow field design of the ... -
Relationships between mechanical and tribological properties of Zn-15Al-based ternary and quaternary alloys
(Carl Hanser Verlag, 2016)Five ternary Zn-15Al-(1- 5)Cu and six quaternary Zn15Al-3Cu-(0.5-3) Si alloys were prepared by permanent mold casting for this work. Their unlubricated sliding friction and wear properties were investigated at a pressure ... -
Investigation of the cutting forces and surface roughness in milling carbon fiber reinforced polymer composite material
(Inst Za Kovinske Materiale I in Tehnologie, 2016)In this study, milling of a carbon-fiber-reinforced polymer composite material (CFRP) was investigated experimentally using various carbide end mills. the input parameters included the spindle speed, feed rate and cutting ... -
Exergy, exergoenvironmental and exergoeconomic evaluation of a heat pump-integrated wall heating system
(Pergamon-Elsevier Science Ltd, 2016)In this study, a vertical ground source heat pump wall heating system belonging to the Yildiz Renewable Energy House on the Davutpasa Campus of Yildiz Technical University was experimentally and theoretically studied. the ... -
Viscous dissipation effects on entropy generation in heated vertical parallel-plate channels for mixed convection
(Inderscience Enterprises Ltd, 2017)In this study, effect of viscous dissipation on entropy generation for fully developed incompressible laminar flow mixed convection in vertical parallel-plate channels with asymmetric and symmetric uniform heat fluxes was ... -
A parametric study on exergetic performance of a YSZ electrolyte supported SOFC stack
(Inderscience Enterprises Ltd, 2017)This paper presents a parametric study on the exergetic performance assessment of an electrolyte supported solid oxide fuel cell (SOFC) stack. Considering the operating and design parameters of yttria stabilised zirconia ... -
A preface to the special issue section on "The National Hydrogen Technologies Congress (UHTEK 2015), 20-23 December 2015, Istanbul, Turkey"
(Pergamon-Elsevier Science Ltd, 2017)Hydrogen energy studies are considered to be vital for the future energy scenarios of Turkey. In this regard, in order to investigate and develop the existing potential of hydrogen energy studies in Turkey, National ... -
Exergetic sustainability indicators for a high pressure hydrogen production and storage system
(Pergamon-Elsevier Science Ltd, 2017)This study examines the exergetic sustainability effect of PEM electrolyzes (PEME) integrated high pressure hydrogen gas storage system whose capacity is 3 kg/h. For this purpose, the indicators, previously used in the ... -
Numerical investigation for convective heat transfer and friction factor under pulsating flow conditions
(E D P Sciences, 2018)For pulsating flow, the behaviours of the convective heat transfer and friction factor for a periodic corrugated channel are investigated numerically. the finite volume method is used in the numerical study. Three different ... -
The energy efficient configurations of natural convection heat transfer in square enclosures with heatlines
(Yildiz Technical Univ, 2018)A steady state natural convection heat transfer is numerically investigated in a two-dimensional square enclosure. One of the side walls of the enclosure is brought to high temperature and the upper wall is insulated. the ... -
Saturated flow boiling characteristics in single rectangular minichannels: effect of aspect ratio
(Taylor & Francis Inc, 2018)In this study, saturated flow boiling characteristics of deionized water in single rectangular minichannels are investigated experimentally. A special attention is paid to the effect of aspect ratio (channel width to depth, ... -
A performance comparison study of uncoated and TiAlN coated carbide end mill on machining of the Al-35Zn alloy
(Iop Publishing Ltd, 2018)In this study, Al-35Zn alloy was produced by permanent mold casting. To investigate the cutting performance of uncoated and TiAlN coated carbide end mills on this alloy, a series of tests were carried out in the CNC vertical ... -
Effects of different cutting methods for electrical steel sheets on performance of induction motors
(Sage Publications Ltd, 2018)In this study, by cutting electrical steel stator laminations, one of the most important components of electrical machines by different cutting methods, the effects of these cutting methods on motor efficiency are investigated. ... -
A preface to the special issue section on "The Second International Hydrogen Technologies Congress (IHTEC 2017), 15-18 March 2017, Adana, Turkey"
(Pergamon-Elsevier Science Ltd, 2018)Hydrogen energy studies are considered to be vital for the future energy scenarios of Turkey. In this regard, in order to investigate and develop the existing potential of hydrogen energy studies in Turkey and other ... -
Exergetic performance comparison of air and hydrogen gas flowing through the annular curved duct
(Pergamon-Elsevier Science Ltd, 2018)The main objective of this study is to parametrically compare the exergetic performance of air and hydrogen gas flow through the curved annular duct. For this purpose, it is assumed that, i) air and hydrogen are considered ... -
Experimental investigation of coaxial impinging air jets
(Pergamon-Elsevier Science Ltd, 2018)This study experimentally investigates hydrodynamical and thermal characteristics of coaxial confined impinging turbulent air jets. Various values of the dimensionless nozzle-to-plate distances and dimensionless flowrate ...