Browsing by Author "Altunok, T."

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Citation - Scopus: 2
A Systems Approach for Technology Assessment and Selection
(2012) Demirkiran, Z.K.; Altunok, Taner; Altunok, T.; Makine Mühendisliği
Each system development project necessitates making decisions on the selection of technologies among available alternatives for the system and is covered in the technology assessment phase in the acquisition process. For the assessment very limited numbers of methodologies most of which are qualitative are defined in the literature. This study aims to propose a systematic model, which can be used as a guide by planners or system architects in the multi-criteria technology selection process. The model also proposes a method to define the critical technology elements for a system. A case study on Unmanned Aerial Vehicle (UAV) communication systems is presented to illustrate the applicability of the model. © 2012 IEEE.
Citation - WoS: 9
Citation - Scopus: 10
Analysis of exergy and energy of sugar production process in sugar plant
(Maney Publishing, 2010) Sahin, H. M.; Altunok, Taner; Acir, A.; Altunok, T.; Baysal, E.; Kocyigit, E.; 40424; Makine Mühendisliği
In this paper, the energy and exergy analysis results of sugar production processes were presented by using operational system data from the Kayseri sugar plant, Turkey. All sugar production processes were thought as a steady state open thermodynamics system and employed the energy and exergy analyses, based on the first and second laws of thermodynamics. The best values of the energy and exergy efficiencies were obtained as 95.1% for the juice production process and 74.3% for the juice concentration process respectively. Moreover, the location of the energy degradation and the irreversibility were determined during the whole sugar production processes. Consequently, it has been pointed out that the energy and exergy efficiencies can be improved if the rates of the energy degradation and irreversibility in the sugar production processes are reduced.