Numerical and Experimental Research on a Kaibel Divided-Wall Column: Design and Steady-State and Dynamic Operation

The article researches and analyses the temperature of two kinds of new hot knife. And it also does the thermal analysis by Pro/e MECHANICAL about the special steel hot knife. It shows the integral and steady-state distribution of the temperature of the metal knife and proves the accuracy of the experimental data. Through the practical production, the ideal result of the cutting surface can be obtained by controlling the temperature. The article also makes the contrast of the two kinds of surfaces by the electron microscopy. By the contrast, the surface which meets the technological requirements can be obtained by the cutting of the hot knife.

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Modelling and testing of a hydrodynamic clutch filled with electrorheological fluid in varying degree

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x18818780 ◽

2019 ◽

Vol 30 (4) ◽

pp. 649-660 ◽

Cited By ~ 5

Author(s):

Artur Olszak ◽

Karol Osowski ◽

Zbigniew Kęsy ◽

Andrzej Kęsy

Keyword(s):

Steady State ◽

Mathematical Models ◽

Experimental Research ◽

Fluid Flows ◽

Electrorheological Fluid ◽

Angular Speed ◽

Working Fluid ◽

Filling Degree ◽

One Dimensional ◽

Working Space

The article concerns steady-state characteristics of a hydrodynamic clutch with electrorheological working fluid controlled by changes in strength of electric field and changes in the filling degree. The characteristics were obtained by experimenting, as well as calculations based on one-dimensional mathematical models. While creating the mathematical models, factors taken into consideration included differences between methods controlling the clutch, as well as various ways the working fluid flows in the clutch’s working space, depending on the relation of angular speed of rotors. The resultant mathematical models were verified with experimental research.

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One-Cycle Control of Three-Phase Five-Level Diode-Clamped STATCOM

Energies ◽

10.3390/en14071830 ◽

2021 ◽

Vol 14 (7) ◽

pp. 1830

Author(s):

In Wha Jeong ◽

Tae Hyun Sung

Keyword(s):

Steady State ◽

Control Method ◽

Experimental Results ◽

Static Var Compensator ◽

Pwm Control ◽

Multilevel Converter ◽

Dynamic Operation ◽

Three Phase ◽

Voltage Balance ◽

Level Converter

This paper presents a new multilevel one-cycle control (OCC) technique for a five-level diode-clamped multilevel converter (DCMC)-based static VAR compensator (STATCOM). The OCC algorithm in combination with multi-carrier level-shifted PWM control is used in the proposed five-level DCMC-based STATCOM. The automatic dc link voltage balance is simply realized by four voltage compensators presented as the part of the OCC controller. In this paper the OCC principle of a two-level converter-based STATCOM is reviewed and extended to the five-level DCMC-based STATCOM. The proposed multilevel OCC control method of the five-level DCMC-based STATCOM in steady-state and dynamic operation modes is verified by simulation and experimental results.

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