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Simultaneous removal 3

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AC-DC Power Integration Techniques

Ma Weiming

Strategic Study of CAE 2002, Volume 4, Issue 12,   Pages 53-59

Abstract:

A novel AC — DC machine is invented on the basis of the proposed new idea of electric powerintegration, wherein the stator with one set of 3-phase AC winding and another set of 12-phase DC windingd-axis field winding and a q-axis stabilizing winding, is combined with a 12-phase bridge rectifier, an ACSimultaneous AC and DC power supplies with high quality being available, this new generator is especiallyDue to complete electrical separation of the AC and DC circuits and usage of the properly designed 12

Keywords： electric power integration     double-winding AC - DC generator     12-phase rectification     simultaneous AC and    

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Emergence in cyber-physical systems: potential and risk

Shmuel Tyszberowicz, David Faitelson,tyshbe@tau.ac.il,davidf@afeka.ac.il

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 11,   Pages 1535-1670 doi: 10.1631/FITEE.2000279

Abstract: (CPSs) are distributed assemblages of computing, communicating, and physical components that sense their environment, algorithmically assess the incoming information, and affect their physical environment. Thus, they share a common structure with other , and therefore share both the possible benefits and the probable harmful effects of emergent phenomena. Emergence is an often unexpected pattern that arises from the interactions among the individual system components and the environment. In this paper we focus on three major problems concerning emergence in the context of CPSs: how to successfully exploit emergence, how to avoid its detrimental effects in a single CPS, and how to avoid harmful emergence that arises due to unexpected interaction among several independently developed CPSs that are operating in the same environment. We review the state of the research with regard to these problems and outline several approaches that could be used to address them.
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Process synthesis with simultaneous consideration of inherent safety-inherent risk footprint

Andreja Nemet, Jiří J. Klemeš, Zdravko Kravanja

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 745-762 doi: 10.1007/s11705-018-1779-7

Abstract:

Process plants should be designed to be economically viable and environmentally friendly, while also being operable and maintainable during process implementation. The safety of processes is among the most important considerations in obtaining results that are more acceptably realistic, as it is linked to the availability and reliability of the process. Inherent safety can effectively be enhanced in the early stages of the design, when the main decisions on process design are made. The aim of this study is to enhance and select the appropriate risk assessment method and to incorporate it into process synthesis, using a mathematical programming approach. A mixed-integer, nonlinear programming (MINLP) model was used for the synthesis of a methanol production process, considering risk assessment during the synthesis. Risk assessment is performed simultaneously with the MINLP process synthesis, where the risk is determined either for the whole process as overall risk, or on a per unit-of-a-product basis. For the latter, a new measurement is proposed: the inherent risk footprint. The results of a case study led to two main conclusions: (i) Significantly safer designs can be obtained at negligible economic expense, and (ii) at higher production capacities, a lower inherent risk footprint can be achieved. The results also indicate that designs obtained using this method can have significantly increased inherent safety, while remaining economically viable.

Keywords： inherent safety     process design     simultaneous risk assessment     risk footprint     methanol process    

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Impact of selection of DC base values and DC link control strategies on sequential AC-DC power-flow convergence

Shagufta KHAN,Suman BHOWMICK

Frontiers in Energy 2015, Volume 9, Issue 4,   Pages 399-412 doi: 10.1007/s11708-015-0374-6

Abstract: This paper demonstrates the convergence of the integrated AC-DC power-flow algorithm as affected by theFor power-flow modeling of integrated AC-DC systems, the base values of the various DC quantities cansequential method is used to solve the DC variables in the Newton Raphson (NR) power flow model, where ACseparately and are coupled by injecting an equivalent amount of real and reactive power at the terminal AC

Keywords： AC-DC power-flow     Newton-Raphson method     high voltage direct current (HVDC) control strategy    

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Research on the variable speed technology of large power alternating current motor

Li Chongjian

Strategic Study of CAE 2009, Volume 11, Issue 5,   Pages 31-36

Abstract:

In this paper, the development status of the domestic large power ACThe domestic large power AC drivers fed by cycloconverters have been greatly developed, and some innovationThe development of the first domestic 7.5 MVA IGCT AC-DC (direct current)-AC converter is also introduced

Keywords： large power AC motor     cycloconverter     AC-DC-AC converter     IGCT    

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Simultaneous saccharification and fermentation of wheat bran flour into ethanol using coculture of amylotic

K. Manikandan, T. Viruthagiri

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 3,   Pages 240-249 doi: 10.1007/s11705-009-0205-6

Abstract: Studies on simultaneous saccharification and fermentation (SSF) of wheat bran flour, a grain millingSimultaneous saccharificiation and fermentation of liquefied wheat bran starch to bioethanol was studied

Keywords： simultaneous saccharification and fermentation (SSF)     starch     coculture fermentation     statistical experimental    

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efficiency of nitrogen removing bacterial population to a wide range of C:N ratio (1.5:1 to 14:1) for simultaneous

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1522-y

Abstract:

• Simultaneous C & N removal in Methammox occurs at wide C:N ratio.

Keywords： Methanogens     Biological Nitrogen Removal (BNR)     Simultaneous     Methammox     C:N ratio    

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Direct field oriented control scheme for space vector modulated AC/DC/AC converter fed induction motor

F. BENCHABANE, A. TITAOUINE, O. BENNIS, K. YAHIA, D. TAIBI

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 129-137 doi: 10.1007/s11708-012-0183-0

Abstract: This paper investigates a Luenberger flux observer with speed adaptation for a direct field oriented control of an induction motor. An improved method of speed estimation that operates on the principle of speed adaptive flux and current observer has been proposed. An observer is basically an estimator that uses a plant model and a feedback loop with measured stator voltage and current. Simulation results show that the proposed direct field oriented control with the proposed observer provides good performance dynamic characteristics. The induction motor is fed by an indirect power electronics converter. This indirect converter is controlled by a sliding mode technique that enables minimization of harmonics introduced by the line converter, as well as the control of the power factor and DC-link voltage. The robustness of the overall system is studied using simulation for different operating modes and varied parameters.

Keywords： induction motor     direct filed oriented control     Luenberger observer     estimation     space vector modulation (SVM)     sliding mode control     boost-rectifier    

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Toward a nonlinear control of an AC-DC-PWM converter dedicated to induction heating

Amel HADRI-HAMIDA, S. ZEROUALI, A. ALLAG

Frontiers in Energy 2013, Volume 7, Issue 2,   Pages 140-145 doi: 10.1007/s11708-013-0243-0

Abstract: In this paper, a nonlinear control strategy applied to an AC-DC-pulse width modulation (PWM) converter

Keywords： DC-DC converter     AC-DC-pulse width modulation (PWM) converter     induction heating     nonlinear control    

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Activity and characteristics of “Oxygen-enriched” highly reactive absorbent for simultaneous flue gas

Yi ZHAO,Tianxiang GUO,Zili ZANG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 2,   Pages 222-229 doi: 10.1007/s11783-014-0636-2

Abstract: Oxygen-enriched” highly reactive absorbent was prepared by mixing fly ash, lime and a small quantity of KMnO for simultaneousThe highest simultaneous removal efficiency, 94.5% of SO and 64.2% of NO, was achieved under the optimal

Keywords： Oxygen-enriched” highly reactive absorbent     Surface characteristics     Flue gas circulating fluidized bed     Simultaneous    

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Sensorless direct torque control for salient-pole PMSM based on extended Kalman filter fed by AC/DC/AC

F. BENCHABANE, A. TITAOUINE, O. BENNIS, K. YAHIA, D. TAIBI, A. GUETTAF

Frontiers in Energy 2012, Volume 6, Issue 3,   Pages 247-254 doi: 10.1007/s11708-012-0190-1

Abstract: In this paper, a new sensorless interior permanent magnet synchronous motor (IPMSM) drives method with extended Kalman filter (EKF) for speed, rotor position and load torque estimation is proposed. The direct torque control (DTC) technique for permanent magnet synchronous motor (PMSM) is receiving increasing attention due to the important advantages of the low dependence on motor parameters when compared with other motor control techniques. The Kalman filter is an observer for linear and non-linear systems and is based on the stochastic intromission, in others words, noise. The PMSM is fed by an indirect power electronic converter which is controlled by a sliding mode technique. The simulation tests performed for different operating conditions have confirmed the robustness of the overall system; and it is shown that the sliding mode technique has successfully minimized the different harmonics introduced by the line converter.

Keywords： direct torque control (DTC)     sensorless control     extended Kalman filter (EKF)     permanent magnet synchronous motor (PMSM)     boost-rectifier    

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Feasibility study on simultaneous removal of sulfur and trace selenium in the MTD-FGD reactor

LI Yuzhong, TONG Huiling, ZHUO Yuqun, LI Yan, CHEN Changhe, XU Xuchang

Frontiers in Energy 2007, Volume 1, Issue 3,   Pages 259-263 doi: 10.1007/s11708-007-0036-4

Abstract: This study deals with the simultaneous removal of sulfur dioxide (SO) and trace selenium dioxide (SeOby calcium oxide (CaO) adsorption in the moderate temperature range, especially the feasibility of simultaneous

Keywords： Ca-based sorbent     product     feasibility     thermogravimetric analyzer     simultaneous removal    

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Methanogenic community structure in simultaneous methanogenesis and denitrification granular sludge

Yujiao Sun, Juanjuan Zhao, Lili Chen, Yueqiao Liu, Jiane Zuo

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 4, doi: 10.1007/s11783-018-1067-2

Abstract:

• UASB with SMD granules was operated with high removal efficiency of COD and NO3--N.

• Methanosaetaceae was absolute predominant methanogen in SMD granules.

• The methanogen quantity and activity decreased as C/N decreased from 20:1 to 5:1.

• Bacterial community succession happened with C/N decreasing.

Keywords： Simultaneous methanogenesis and denitrification (SMD)     Methanogens     Community structure     Diversity index    

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Tailoring the simultaneous abatement of methanol and NO on Sb-Ce-Zr catalysts via copper modification

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 10, doi: 10.1007/s11684-022-1565-0

Abstract:

● Cu addition enhances CH3OH oxidation and alleviates its inhibitory effect on SCR.

Keywords： Copper modification     Sb-CeZr2Ox catalyst     NOx     Methanol     Simultaneous    

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A Cu-modified active carbon fiber significantly promoted HS and PH simultaneous removal at a low reaction

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1425-3

Abstract: ListItem>

• Cu0.15-ACF performs the best for H2S and PH3 simultaneous

Keywords： ACF     H2S     PH3     Cu     Low temperature     Simultaneous removal    

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Title Author Date Type Operation

AC-DC Power Integration Techniques

Ma Weiming

Journal Article

Emergence in cyber-physical systems: potential and risk

Shmuel Tyszberowicz, David Faitelson,tyshbe@tau.ac.il,davidf@afeka.ac.il

Journal Article

Process synthesis with simultaneous consideration of inherent safety-inherent risk footprint

Andreja Nemet, Jiří J. Klemeš, Zdravko Kravanja

Journal Article

Impact of selection of DC base values and DC link control strategies on sequential AC-DC power-flow convergence

Shagufta KHAN,Suman BHOWMICK

Journal Article

Research on the variable speed technology of large power alternating current motor

Li Chongjian

Journal Article

Simultaneous saccharification and fermentation of wheat bran flour into ethanol using coculture of amylotic

K. Manikandan, T. Viruthagiri

Journal Article

efficiency of nitrogen removing bacterial population to a wide range of C:N ratio (1.5:1 to 14:1) for simultaneous

Journal Article

Direct field oriented control scheme for space vector modulated AC/DC/AC converter fed induction motor

F. BENCHABANE, A. TITAOUINE, O. BENNIS, K. YAHIA, D. TAIBI

Journal Article

Toward a nonlinear control of an AC-DC-PWM converter dedicated to induction heating

Amel HADRI-HAMIDA, S. ZEROUALI, A. ALLAG

Journal Article

Activity and characteristics of “Oxygen-enriched” highly reactive absorbent for simultaneous flue gas

Yi ZHAO,Tianxiang GUO,Zili ZANG

Journal Article

Sensorless direct torque control for salient-pole PMSM based on extended Kalman filter fed by AC/DC/AC

F. BENCHABANE, A. TITAOUINE, O. BENNIS, K. YAHIA, D. TAIBI, A. GUETTAF

Journal Article

Feasibility study on simultaneous removal of sulfur and trace selenium in the MTD-FGD reactor

LI Yuzhong, TONG Huiling, ZHUO Yuqun, LI Yan, CHEN Changhe, XU Xuchang

Journal Article

Methanogenic community structure in simultaneous methanogenesis and denitrification granular sludge

Yujiao Sun, Juanjuan Zhao, Lili Chen, Yueqiao Liu, Jiane Zuo

Journal Article

Tailoring the simultaneous abatement of methanol and NO on Sb-Ce-Zr catalysts via copper modification

Journal Article

A Cu-modified active carbon fiber significantly promoted HS and PH simultaneous removal at a low reaction

Journal Article