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When the poloidal field (PF) magnet power supplies (MPS) of 11 units are operated, max power of 200 MVA is required to achieve long pulse operation of Korea Superconducting Tokamak Advanced Research (KSTAR). Motor Generator (MG) system was installed to resolve power shortage because the available grid power is only 100 MVA at the National Fusion Research Institute (NFRI) site. MG system is composed...
Presented in this paper is a FAB simulation framework considering the recipe arrangement problem of FAB tools. It is known that the WIP fluctuation is mainly caused by improper dispatching rules. Practical point of view, however, there is another cause of the WIP imbalance. We call the problem as a “recipe arrange problem of tools”. A FAB consists of multiple tool groups, and each tool group has multiple...
Effects of channel-thickness-fluctuation scattering on electron mobility have been analyzed and it was found that channel-thickness-fluctuation scattering is important parameters decide mobility in ETB III-V-OI MOSFETs. Also, we have clarified that the introduction of MOS interface buffer layer is effective to enhance mobility through the increase of μfluctuation.
Hydrogen compressing system is the most important part of hydrogen economy. There develop inherently pressure pulsation in reciprocating hydrogen compressing system. Snubber unit has been employed then to decrease it. An experiment has been conducted to investigate the performance of snubber used in reciprocating compression system. CFD analysis is applied to get the pressure values at different sections...
In this paper, a simple coordinated control method based on minimal-order observer for multiple PV systems is proposed. Here, output power command is generated in two steps: central and local. Estimated load power is used to generate the central output power command considering load variation index and PV base power. Load power is estimated by a minimal-order observer. Then, load variation index is...
Due to the inter-particle force, the most significant characteristic of nano to micron particle flow may become the agglomeration, which considerably affects the flow patterns. The agglomeration results in a reduction in the number and an increase in the size of particles, both of which directly affect the frequency of inter-particle collisions and, in turn, the particle phase properties. In this...
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