Power Exchanges of Hybrid Fuel Cell-Ultracapacitor Power Sources Feeding Pulse Loads

The paper focuses on the experimental results of a series of tests performed on a hybrid electrical source. The hybrid generator is made up of a fuel cell primary source equipped with an ultracapacitor storage device. The paper presents an examination of the steady-state and transient performance of the hybrid fuel cell-ultracapacitor source in terms of power quality. The aim is to investigate on fuel cell-ultracapacitor source’s behavior to feed pulsing loads.

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Improved Load Sharing Control Techniques for Inverters used in a Microgrid

International Journal of Emerging Electric Power Systems ◽

10.2202/1553-779x.2024 ◽

2009 ◽

Vol 10 (1) ◽

Cited By ~ 1

Author(s):

Wei Yao ◽

Zhaoming Qian

Keyword(s):

Steady State ◽

Transient Response ◽

Single Phase ◽

Load Sharing ◽

Power Sharing ◽

Experimental Results ◽

Control Technique ◽

Transient Performance ◽

Control Techniques ◽

Control Scheme

In this paper, an improved load sharing control scheme is presented, which is able to improve the transient response and power sharing accuracy of parallel-connected inverters used in microgrid. It also shows how the improved droop method can be easily adapted to account for the operation of parallel-connected inverters, providing good performance under the variation and disturbance of loads, as well as achieving good steady-state objectives and transient performance. Two DSP-based single-phase Microgrid inverters are designed and implemented. Simulation and experimental results are all reported, confirming the validity of the proposed control technique.

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Fuel Cell Application for Investigating the Quality of Electricity from Ship Hybrid Power Sources

Journal of Marine Science and Engineering ◽

10.3390/jmse7080241 ◽

2019 ◽

Vol 7 (8) ◽

pp. 241 ◽

Cited By ~ 1

Author(s):

Hyeonmin Jeon ◽

Seongwan Kim ◽

Kyoungkuk Yoon

Keyword(s):

Fuel Cell ◽

Power System ◽

Power Quality ◽

Molten Carbonate Fuel Cell ◽

Molten Carbonate ◽

Test Bed ◽

Diesel Generator ◽

Combined System ◽

Power Sources

Since recent marine application of fuel cell systems has been due largely limited to small-sized ships, this paper was aimed to investigate the technical applicability of molten carbonate fuel cell (MCFC) for medium and large-sized ships, using a 180 kW class hybrid test bed with combined power sources: A 100 kW MCFC, a 30 kW battery and a 50 kW diesel generator. This study focused primarily on determining whether the combined system designed in consideration of actual marine power system configuration could function properly. A case study was conducted with a 5500 Twenty-foot Equivalent Unit (TEU) container vessel. The operation profile was collected and analyzed in order to develop electric load scenarios applicable to the power system. Throughout the experiment, we evaluated the power quality of the voltage and frequency in the process of synchronization and de-synchronization across the power sources. Therefore, research results revealed that power quality continued to be excellent. This outcome provides insight into the technical reliability of MCFC application on large marine vessels.

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GENERATION AND PROPERTIES OF INFRARED RADIATION

Computational nanotechnology ◽

10.33693/2313-223x-2019-6-2-101-137 ◽

2019 ◽

Vol 6 (2) ◽

pp. 101-137

Author(s):

RUSTAM KHAKIMOVICH RAKHIMOV

Keyword(s):

Electromagnetic Radiation ◽

Infrared Radiation ◽

Radiation Spectrum ◽

Laws Of Nature ◽

Primary Source ◽

Ceramic Materials ◽

Experimental Results ◽

Ir Radiation ◽

Scattering Of Light

The article presents the main basic laws of nature and modern theories of the nature of electromagnetic radiation, its generation, characteristics, and laws of reflection, absorption and scattering of light. The principle of transformation of the radiation spectrum of the primary source using the developed ceramic materials are shown, as well as experimental results of the interaction of IR radiation with matter and various mechanisms of influence on various objects and processes are described.

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Holdup and holdup profiles in the reciprocating plate extractor VPE

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19902648 ◽

1990 ◽

Vol 55 (11) ◽

pp. 2648-2661 ◽

Cited By ~ 1

Author(s):

Helena Sovová ◽

Vladislav Bízek ◽

Jaroslav Procházka

Keyword(s):

Steady State ◽

Experimental Results ◽

Model Parameters ◽

Dispersed Phase ◽

Pulse Form ◽

Sieve Plates

In this work measurements of mean holdup of dispersed phase, of axial holdup profiles and of flooding points in a reciprocating plate contactor with both the VPE-type plates and the sieve plates were carried out. The experimental results were compared with a monodisperse model of steady-state column hydrodynamics and the model parameters were evaluated. Important differences in the behaviour of the two plate types could be identified. Comparison was also made between two reciprocating drives of different pulse form.

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Steady-State and Dynamic Properties of the Floating-Ring Journal Bearing

Journal of Lubrication Technology ◽

10.1115/1.3601543 ◽

1968 ◽

Vol 90 (1) ◽

pp. 243-253 ◽

Cited By ~ 26

Author(s):

F. K. Orcutt ◽

C. W. Ng

Keyword(s):

Steady State ◽

Journal Bearing ◽

Dynamic Properties ◽

Calculated Data ◽

Experimental Results ◽

Supply Pressure ◽

Pressure Parameter

Calculated data on steady-state and dynamic properties of the plain cylindrical floating-ring bearing with pressurized lubricant supply are given. The data are for a bearing with L/D of 1, and values of the ratio of inner to outer film clearances of 0.7 and 1.3. One value of dimensionless supply pressure parameter is covered. Experimental results are presented which verify the calculated results and which supplement them, particularly with respect to stability characteristics of the bearing.

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An Assessment of the Value of Theory in Predicting Gas-Bearing Performance

Journal of Basic Engineering ◽

10.1115/1.3658924 ◽

1961 ◽

Vol 83 (2) ◽

pp. 195-200 ◽

Cited By ~ 1

Author(s):

S. Cooper

Keyword(s):

Steady State ◽

Slip Velocity ◽

Reynolds Equation ◽

Energy Equation ◽

Experimental Methods ◽

Experimental Results ◽

Theoretical Investigations ◽

Gas Bearing ◽

Theoretical Results

The object of the paper is to indicate the value of theoretical investigations of hydrodynamic finite bearings under steady-state conditions. Methods of solution of Reynolds equation by both desk and digital computing, and methods of stabilizing the processes of solution, are described. The nondimensional data available from the solutions are stated. The outcome of an attempted solution of the energy equation is discussed. A comparison between some theoretical and experimental results is shown. Experimental methods employed and some difficulties encountered are discussed. Some theoretical results are given to indicate the effects of the inclusion of slip velocity, stabilizing slots, and a simple case of whirl.

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