Off-design Performance Characteristics of SOFC-GT Hybrid System Operating with Syngas Fuel

To a molten carbonate fuel cell/ gas turbine hybrid system, operating temperature which has significant influence on the performance and lifespan of system is researched. The decoupling control of multivariable system is proposed in the temperature control of a hybrid system. In the designing of decoupling controller, the intelligent decoupling method is used based on Quasi-Diagonal Recurrent Neural Network-PID. Simulation results show that the operating temperature of hybrid system can be effectively close to the desired setpoints based on the decoupling controller.

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Analysis on the Performance Characteristics of SOFC/GT Hybrid Systems Based on a Commercially Available MW-Class Gas Turbine

3rd International Conference on Fuel Cell Science, Engineering and Technology ◽

10.1115/fuelcell2005-74061 ◽

2005 ◽

Author(s):

Tae Won Song ◽

Jeong L. Sohn ◽

Tong Seop Kim ◽

Sung Tack Ro

Keyword(s):

Gas Turbine ◽

Hybrid System ◽

Guide Vane ◽

Control Strategies ◽

Operating Conditions ◽

Performance Characteristics ◽

Inlet Guide Vane ◽

Part Load ◽

Optimal Power ◽

Selection Of

To investigate the possible applications of the SOFC/MGT hybrid system to large electric power generations, a study for the kW-class hybrid power system conducted in our group is extended to the MW-class hybrid system in this study. Because of the matured technology of the gas turbine and commercial availability in the market, it is reasonable to construct a hybrid system with the selection of a gas turbine as an off-the-shelf item. For this purpose, the performance analysis is conducted to find out the optimal power size of the hybrid system based on a commercially available gas turbine. The optimal power size has to be selected by considering specifications of a selected gas turbine which limit the performance of the hybrid system. Also, the cell temperature of the SOFC is another limiting parameter to be considered in the selection of the optimal power size. Because of different system configuration of the hybrid system, the control strategies for the part-load operation of the MW-class hybrid system are quite different from the kW-class case. Also, it is necessary to consider that the control of supplied air to the MW-class gas turbine is typically done by the variable inlet guide vane located in front of the compressor inlet, instead of the control of variable rotational speed of the kW-class micro gas turbine. Performance characteristics at part-load operating conditions with different kinds of control strategies of supplied fuel and air to the hybrid system are investigated in this study.

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Research on Performance Characteristics of a SOFC/GT Hybrid System under Part-Load Operations with Two Control Modes

2011 Asia-Pacific Power and Energy Engineering Conference ◽

10.1109/appeec.2011.5748954 ◽

2011 ◽

Author(s):

Wei Wang ◽

He Li

Keyword(s):

Hybrid System ◽

Performance Characteristics ◽

Part Load

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Performance characteristics of a direct carbon fuel cell/thermoelectric generator hybrid system

Energy Conversion and Management ◽

10.1016/j.enconman.2014.10.035 ◽

2015 ◽

Vol 89 ◽

pp. 683-689 ◽

Cited By ~ 64

Author(s):

Mingzhou Zhao ◽

Houcheng Zhang ◽

Ziyang Hu ◽

Zhufeng Zhang ◽

Jinjie Zhang

Keyword(s):

Fuel Cell ◽

Hybrid System ◽

Thermoelectric Generator ◽

Performance Characteristics ◽

Direct Carbon Fuel Cell

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Design, performance characteristics, and field experiences of single-mode cables

Optical Fiber Communication ◽

10.1364/ofc.1986.wi1 ◽

1986 ◽

Author(s):

PETER R. BARK

Keyword(s):

Field Experiences ◽

Single Mode ◽

Performance Characteristics ◽

Design Performance

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A Hybrid System Based on a Personal Turbine (5 kW) and a Solid Oxide Fuel Cell Stack: A Flexible and High Efficiency Energy Concept for the Distributed Power Market

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.1473825 ◽

2002 ◽

Vol 124 (4) ◽

pp. 850-857 ◽

Cited By ~ 22

Author(s):

L. Magistri ◽

P. Costamagna ◽

A. F. Massardo ◽

C. Rodgers ◽

C. F. McDonald

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Hybrid System ◽

High Efficiency ◽

Power Market ◽

Solid Oxide ◽

Oxide Fuel ◽

Design Point ◽

Design Performance ◽

Energy Concept

In this paper a high efficiency and flexible hybrid system representing a new total energy concept for the distributed power market is presented. The hybrid system is composed of a very small size (5 kW) micro gas turbine (named personal turbine—PT) presented in a companion paper by the authors coupled to a small size solid oxide fuel cell (SOFC) stack. The power of the whole system is 36 kW depending on the design parameters assumed for the stack. The design and off-design performance of the hybrid system have been obtained through the use of an appropriate modular code named “HS-SOFC” developed at the University of Genoa and described in detail in this paper. The results of the simulation are presented and discussed with particular regards to: choice of the hybrid system (HS) design point data, HS design point performance, off-design performance of PT and SOFC stack, and off-design performance of the whole HS. Some preliminary economic results are also included based on different fuel and capital cost scenarios and using the cost of electricity as the parameter for comparison between PT and HS.

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Off-Design Performance Characteristics of Supercavitating Hydrofoils in Cascade

Journal of Basic Engineering ◽

10.1115/1.3425142 ◽

1970 ◽

Vol 92 (4) ◽

pp. 797-806

Author(s):

R. Oba

Keyword(s):

Lift Coefficient ◽

Extreme Case ◽

Flow Speed ◽

Performance Characteristics ◽

Inlet Flow ◽

Design Performance ◽

Kaplan Turbine ◽

The Poor ◽

Turbine Runner

The performance characteristics of supercavitating flapped foils in cascade, (such as the lift coefficient, the drag-lift ratio, and the limiting inlet flow speed) are calculated, for various cascade arrangements and flap angles, as well as flap-chord ratios, e. The extreme case when e = 1.0 corresponds simply to adjusting the cascade angle, such as in the Kaplan-turbine runner. It is found that the poor supercavitating cascade performance characteristics at conditions other than the designed condition, that is, the off-design performance characteristics, are noticeably improved with the use of flapped foils. The characteristics of cascaded foils without flaps, especially where there are no adjustments in cascade angle, make their use impractical in the off-design condition.

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