Makine Mühendisliği Bölümü
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Structural design and analysis of a servo crank press
(ELSEVİER, 2016)Due to precision, flexibility, simplicity in construction, easy control, higher speed and lower energy consumptions, servo presses have recently become popular in metal forming applications. Servo press technology combines ... -
Thermodynamic analysis of a refrigeration system with double evaporators and ejector
(GAZI UNIV,, 2016)In this study, theoretical investigations of double evaporator refrigeration system and with adding an ejector to the current system were carried out using energy and momentum equations. The relative increase in COP with ... -
Experimental detemination of convective heat transfer coefficient during open sun and green- house drying of apple slices
(EDP SCIENCES., 2016)A small scale greenhouse type dryer was designed and tested. Convective heat transfer coefficient of apple slices was identified under open sun at natural convection mode and in greenhouse drying at natural and forced ... -
Thermodynamic analysis of bi- evaoparator ejector refrigeration cycle using R744 as natural refrigerant
(YILDIZ TECHNICAL UNIV., 2016)Researchers have been focused on refrigerant R744 because it is a natural refrigerant and its Global Warming Potential value is 1. However, coefficient of performance (COP) of refrigeration systems that use R744 as refrigerant ... -
Novel packing materials for open liquid desiccant system
(ELSEVIER SCIENCE BV, 2016)The objective of this study is to design and test a liquid dehumidification system that can operate with a maximum performance under atmospheric conditions without any mass transfer problems. For this purpose, polycarbonate ... -
Energy and exergy analysis of a combined refrigeration and waste heat driven organic rankine cycle System, thermal Science
(VINCA INST NUCLEAR SCI., 2017)Energy and exergy analysis of a combined refrigeration and waste heat driven organic Rankine cycle system were studied theoretically in this paper. In order to complete refrigeration process, the obtained kinetic energy ... -
A study on heat storage sizing and flow control for a domestic scale solar-powered organic Rankine cycle-vapour compression refrigeration system
(PERGAMON-ELSEVIER SCIENCE LTD, 2019)This paper presents the off-design modelling of a domestic scale solar organic Rankine cycle (ORC) and vapour compression cycle (VCC) in a coupled operation in different operating modes by using evacuated flat plate (EFP) ... -
Modeling of heat transfer coefficient in solar greenhouse type drying systems
(MDPI, 2019)As a sustainable energy source, solar energy is used in many applications. A greenhouse type dryer, which is a food drying system, directly benefits from solar energy. Convective heat transfer coefficient (h(c)) is an ... -
Optimization of the pool boiling heat transfer in the region of the Isolated bubbles using the ABC algorithm
(ISFAHAN UNIV TECHNOLOGY, 2019)The region of the isolated bubble regime, in which the bubbling starts, is a very significant process for boiling heat transfer. In this study, Artificial Bee Colony algorithm (ABC), which is mainly based on the searching ... -
Energy and Exergy Analysis of LiBr-aq and LiCl-aq Liquid Desiccant Dehumidification System
(UNIV NORTH., 2020)In this study, energy and exergy analysis of experimental results obtained from a dehumidification system using LiBr-aq (lithium bromide-water) and LiCl-aq (lithium chloridewater) as desiccant was made. In dehumidifier and ... -
Döner tip rejeneratör diferansiyel denklemlerinin çözümü için en uygun sınır şartlarının belirlenmesi
(GAZI UNIV,, 2020)Rotary type regenerators are used for energy recovery from waste heat, especially in low temperature applications such as air conditioning systems. In this study, the developed mathematical model for rotary type regenerators ... -
First and second law evaluation of combined brayton-organic rankine power cycle
(YILDIZ TECHNICAL UNIV., 2020)In the present work, we have conducted thermodynamic analysis of an organic Rankine cycle (ORC) using waste heat from intercooler and regenerator in Brayton cycle with intercooling, reheating, and regeneration (BCIRR). ... -
Elastic Solution Based On The Mori-Tanaka Sceheme For Pressurized Functionally Graded Cylinder
(CZESTOCHOWA UNIV TECHNOLOGY, 2020)In this paper, an elastic analysis of a thick-walled functionally graded cylinder subjected to internal pressure is examined. Material properties for the isotropic material are estimated to obey the Mori-Tanaka homogenization ... -
Performance of counter flow membrane-based annular pipe liquid desiccant air conditioner
(PERGAMON-ELSEVIER SCIENCE LTD,, 2020)The present study comprises an experimental and numerical simulation of a counter flow membrane-based annular pipe liquid desiccant air conditioner (AP_LDAC) system. The experimental rig was constructed by using DuPont ... -
Investigation on the rheological behavior of Al-Fe-V-Si/Alumina composite powders
(REDAKCIA KOVOVE MATERIALY,, 2012)In this paper, the rheological properties of the feedstocks of Al-Fe-V-Si and Al-Fe-V-Si composites reinforced with alumina were investigated. The feedstocks, containing four different types of powder (Al-Fe-V-Si, Al-Fe-V-Si ... -
Investigation on the behaviour of the functionaly gradient material consisting of boron carbide and aluminum alloy
(INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2012)In the current study the effect of different temperatures on the aging behaviour of a functionally gradient material was investigated to observe the variation of hardness with respect to the aging time. To do this, the ... -
Effect of the martensite volume fraction on the machining of a dual-phase steel using a milling operation
(INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2011)Dual-phase steels are attractive because of their good combination of strength and ductility. However, an increase in the martensite content will decrease the steel's machinability significantly. Therefore, optimum cutting ... -
A micro-damage investigation on a low-alloy steel tested using a 7.62-mm AP projectile | [Raziskava mikropoškodb malolegiranega jekla po preizkusu s kroglo AP 7,62 mm]
(INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2011)Low-alloy steels have been widely used as an armor material in defense systems due to their superior mechanical and weldability properties. In this study, microdamage formation in an AISI 4140 steel, which was hit by 7.62-mm ... -
Sıvı desikant nem alma sisteminin tasarımı ve performansının geliştirilmesi
(GAZİ ÜNİV., 2017)Bu çalışmada, mekanik nem alma sistemlerinin yerine kullanılabilecek bir sıvı desikant nem alma sisteminin tasarımı yapılarak termodinamik analizi yapılmıştır. Tasarlanan ve imalatı yapılan açık sıvı nem alma sisteminin ... -
An experimental study on a bus air conditioner to determine its conformty to design and comfort condition
(Yildiz Technical University Press, 2017)The air conditioning system for a bus should be selected considering a number of parameters, including passenger capacity, local climatic conditions, and fuel consumption. It is possible to determine whether a selected air ...