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Browsing by Author "Özerdem, Barış"
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Air leakage measurement and analysis in duct systems
Aydın, Çiğdem; Özerdem, Barış (Elsevier, 2006-03)Air ducts and related equipments are used in a large number of buildings having thermal comfort. In this study, energy loss related with air leakage is studied. The leakage measurement setup was produced according to NEN-EN ... -
Airfoil optimization for noise emission problem and aerodynamic performance criterion on small scale wind turbines
Göçmen, Tuhfe; Özerdem, Barış (Elsevier, 2012-10)Noise emission is one of the major concerns in wind turbine industry and especially for small scale wind turbines, which are mostly erected to the urban areas; the concern is turning into a problem. This paper focuses on ... -
Break-even analysis and size optimization of a PV/wind hybrid energy conversion system with battery storage - A case study
Ekren, Orhan; Yetkin Ekren, Banu; Özerdem, Barış (Elsevier, 2009-07)This paper aims to show an optimum sizing procedure of autonomous PV/wind hybrid energy system with battery storage and a break-even analysis of this system and extension of transmission line. We use net present value (NPV) ... -
A comment on change of Nusselt number sign in a channel flow filled by a fluid-saturated porous medium with constant heat flux boundary conditions
Uçar, Eren; Mobedi, Moghtada; Özerdem, Barış; Pop, Ioan (Springer, 2013-01)The aim of this Letter is to show that, the Nusselt number sign might be changed without changing of heat transfer direction at the wall of channels, even for flows without viscous dissipation. The sign of the Nusselt ... -
Economic assessment of geothermal district heating systems: A case study of Balçova-Narlıdere, Turkey
Erdoğmuş, Berkan; Toksoy, Macit; Özerdem, Barış; Aksoy, Niyazi (Elsevier, 2006-09)Geothermal energy is an important renewable energy resource in Turkey. The aim of this research is to evaluate the Balcova-Narlidere geothermal district heating system from an economic perspective. The system is the largest ... -
Economical assessment of different HVAC systems for an operating room: Case study for different Turkish climate regions
Özyoğurtçu, Gamze; Mobedi, Moghtada; Özerdem, Barış (Elsevier, 2011-07)In this study, the annual energy consumptions of four different heating, ventilation and air conditioning (HVAC) systems serving to operation rooms (ORs) located at five different cities (Izmir, Antalya, Istanbul, Ankara ... -
Effect of geometrical parameters on heat transfer and pressure drop characteristics of plate fin and tube heat exchangers
Erek, Aytunç; Özerdem, Barış; Bilir, Levent; İlken, Zafer (Elsevier, 2005-10)In this study, the influences of the changes in fin geometry on heat transfer and pressure drop of a plate fin and tube heat exchanger are investigated, numerically. A computational fluid dynamics (CFD) program called ... -
An experimental study on performance and emission characteristics of a hydrogen fuelled spark ignition engine
Kahraman, Erol; Özcanlı, Şevket Cihangir; Özerdem, Barış (Elsevier, 2007-08)In the present paper, the performance and emission characteristics of a conventional four cylinder spark ignition (SI) engine operated on hydrogen and gasoline are investigated experimentally. The compressed hydrogen at ... -
Feasibility study of wind farms: A case study for Izmir, Turkey
Özerdem, Barış; Özer, Serra; Tosun, Mahir (Elsevier, 2006-10)Wind is one of the world's fastest growing renewable energy sources. The rapid growth in wind power is a result of improvements accomplished in technology. This paper presents the technical and economical feasibility of ... -
Fully developed forced convection heat transfer in a porous channel with asymmetric heat flux boundary conditions
Çekmer, Özgür; Mobedi, Moghtada; Özerdem, Barış; Pop, Ioan (Springer, 2011-12)An analytical study is performed on steady, laminar, and fully developed forced convection heat transfer in a parallel plate channel with asymmetric uniform heat flux boundary conditions. The channel is filled with a ... -
Fully developed forced convection in a parallel plate channel with a centered porous layer
Çekmer, Özgür; Mobedi, Moghtada; Özerdem, Barış; Pop, Ioan (Springer, 2012-05)In this study, fully developed heat and fluid flow in a parallel plate channel partially filled with porous layer is analyzed both analytically and numerically. The porous layer is located at the center of the channel and ... -
Heat transfer and pressure drop characteristics of fin-tube heat exchangers with different types of vortex generator configurations
Bilir, Levent; Özerdem, Barış; Erek, Aytunç; İlken, Zafer (Begell House Inc., 2010)A fin-and-tube heat exchanger with three different types of vortex generators is investigated in this study in order to observe the effects of these vortex generators on heat transfer and pressure drop characteristics. The ... -
An investigation of wind characteristics on the campus of Izmir Institute of Technology, Turkey
Özerdem, Barış; Türkeli, Hayri Murat (Elsevier, 2003-06)The European Wind Atlas shows a very high wind energy capacity over the Aegean Sea and its coastal regions. Therefore, the western region of Turkey, which has a long coast along the Aegean Sea, appears to have high potential ... -
Measurement of convective heat transfer coefficient for a horizontal cylinder rotating in quiescent air
Özerdem, Barış (Elsevier, 2000-04)The present paper deals with convective heat transfer from a horizontal cylinder rotating in quiescent air, experimentally. The average convective heat transfer coefficients have been measured by using radiation pyrometer, ... -
A numerical simulation study for the human passive thermal system
Yıldırım, Eda Didem; Özerdem, Barış (Elsevier, 2008)The objective of this study is to create a dynamic model representing a transient three-dimensional passive thermal model of the human body. The model is a multi-segmental, multi-layered representation of the human body ... -
Techno-economic evaluation of a ventilation system assisted with exhaust air heat recovery, electrical heater and solar energy
Özyoğurtçu, Gamze; Mobedi, Moghtada; Özerdem, Barış (Elsevier, 2014-04)The energy consumed to condition fresh air is considerable, particularly for the buildings such as cinema, theatre or gymnasium saloons. The aim of the present study is to design a ventilation system assisted with exhaust ... -
Tensile adhesion of type I collagen to titanium alloy and calcium phosphate coated surfaces with different roughness values
Özerdem, Barış (IOS Press, 2002)The purpose of total joint arthroplasty is to reduce pain and restore function. Its success depends on the formation of a new bone that stabilizes the prosthesis. The proposed solution for this important problem is to have ... -
Wind energy potential estimation and micrositting on Izmir Institute of Technology Campus, Turkey
Türkeli, Hayri Murat; Özerdem, Barış (Elsevier, 2005-08)The aim of this study was to predict the wind energy content over the campus area of Izmir Institute of Technology. The wind data were collected at 10 and 30 m mast heights for a period of 16 months. Mean wind speeds were ... -
Wind speed time series chacacterization hy Hilbert transform
Alpay, Selda; Bilir, Levent; Özdemir, Serhan; Özerdem, Barış (Wiley, 2006-04)Predictions of wind energy potential in a given region are based on on-location observations. The time series of these observations would later be analysed and modelled either by a probability density function (pdf) such ...
