Akış: Mutluluk Bilimi



A new approach to generating non-permutation schedules for flowshops with missing operations
Tabalu, Metin; Şen, Tayyar; Department of Industrial Engineering (2006)
In this study, non-permutation flowshops with missing operations are considered. The primary performance criterion is the total cycle time (i.e. makespan) and the secondary criterion is the total flowtime. In order to obtain the schedule with minimum makespan and minimum total flowtime, non-permutation schedules are being generated instead of permutation ones by permitting multiple jobs bypassing stages where misisng operations occur. A heuristic algorithm has been developed in order to generate non-permuta...
Energy Efficient Scheduling in Flow-shop and Parallel Machine Robotic Cells
Aydoğan, Çiya; Gürel, Sinan; Department of Industrial Engineering (2021-9-10)
Robotic cell scheduling studies mostly focus on increasing the throughput of the cell. Therefore, those studies consider cycle time or makespan minimization objectives. However, energy-efficient and environmentally sensitive manufacturing operations become more important and receive attention in recent studies in the literature. In this thesis, we study two robotic cell scheduling problems with machines and a material handling robot. We consider robot energy consumption as an objective to minimize while max...
Mathematical modeling of fluidized bed combustors with radiation model
Alagöz, Düriye Ece; Selçuk, Nevin; Department of Chemical Engineering (2006)
Simultaneous solution of the conservation equations for energy and chemical species in conjunction with radiative transfer equation was carried out by coupling a previously developed and tested system model of fluidized bed combustion (FBC) to an existing radiation model. The predictive accuracy of the coupled code was assessed by applying it to 0.3 MWt METU Atmospheric Bubbling Fluidized Bed Combustor (ABFBC) Test Rig burning lignite in its own ash and comparing its predictions with the measured temperatur...
Mathematical modeling of FBC'a co-fired with lignite and biomass
Moralı, Ekrem Mehmet; Selçuk, Nevin; Department of Chemical Engineering (2007)
Increasing environmental legislations on pollutant emissions originated from fossil fuel combustion and intention of increasing the life of existing fossil fuels give rise to the use of renewable sources. Biomass at this juncture, with its renewable nature and lower pollutant emission levels becomes an attractive energy resource. However, only seasonal availability of biomass and operation problems caused by high alkaline content of biomass ash restrict its combustion alone. These problems can be overcome b...
Synthesis of low silica/alumina zeolite membranes in a flow system
Akbay, Sezin; Kalıpçılar, Halil; Department of Chemical Engineering (2007)
Zeolite A-type membranes are usually synthesized from hydrogels and rarely synthesized from clear solutions mostly in batch systems. Few studies were carried out using semi-continuous systems for zeolite A membrane synthesis. Zeolite A membranes are mainly used in pervaporation processes for separation of water from water/organic mixtures because of their hydrophilic property. In this study, zeolite A membranes were synthesized on -alumina supports from a clear solution with a molar composition of 49Na2O: ...
Citation Formats
E. Eret, Akış: Mutluluk Bilimi. 2017.