Calculating Variable Condition Performance of Micro-Gas Turbine-Fuel Cell System by PNVMECA Software

2019 ◽  
Vol 08 (02) ◽  
pp. 41-47
Author(s):  
百汇 徐
Keyword(s):  
Fuel Cell ◽  
Gas Turbine ◽  
Cell System ◽  
Fuel Cell System ◽  
Micro Gas Turbine ◽  
Variable Condition

Evaluation of Cathode Air Flow Transients in a SOFC/GT Hybrid System Using Hardware in the Loop Simulation

2014 ◽  
Author(s):  
Nana Zhou ◽  
Chen Yang ◽  
David Tucker
Keyword(s):  
Fuel Cell ◽  
Gas Turbine ◽  
Hybrid System ◽  
Mass Flow ◽  
Cell System ◽  
Department Of Energy ◽  
Dynamic Responses ◽  
Partial Recovery ◽  
Fuel Cell System ◽  
Air Mass

Thermal management in the fuel cell component of a direct fired solid oxide fuel cell gas turbine (SOFC/GT) hybrid power system, especially during an imposed load transient, can be improved by effective management and control of the cathode air mass flow. The response of gas turbine hardware system and the fuel cell stack to the cathode air mass flow transient was evaluated using a hardware-based simulation facility designed and built by the U.S. Department of Energy, National Energy Technology Laboratory (NETL). The disturbances of the cathode air mass flow were accomplished by diverting air around the fuel cell system through the manipulation of a hot-air bypass valve in open loop experiments. The dynamic responses of the SOFC/GT hybrid system were studied in this paper. The evaluation included distributed temperatures, current densities, heat generation and losses along the fuel cell over the course of the transient along with localized temperature gradients. The reduction of cathode air mass flow resulted in a sharp decrease and partial recovery of the thermal effluent from the fuel cell system in the first 10 seconds. In contrast, the turbine rotational speed did not exhibit a similar trend. The collection of distributed fuel cell and turbine trends obtained will be used in the development of controls to mitigate failure and extend life during operational transients.

Fuel cell system modeling for solid oxide fuel cell/gas turbine hybrid power plants, Part I: Modeling and simulation framework

2011 ◽  
Vol 196 (3) ◽  
pp. 1205-1215 ◽  
Author(s):  
Florian Leucht ◽  
Wolfgang G. Bessler ◽  
Josef Kallo ◽  
K. Andreas Friedrich ◽  
H. Müller-Steinhagen
Keyword(s):  
Fuel Cell ◽  
Gas Turbine ◽  
Power Plants ◽  
System Modeling ◽  
Cell System ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Simulation Framework ◽  
Fuel Cell System ◽  
Hybrid Power

Impact of Different Volume Sizes on Dynamic Stability of a Gas Turbine Fuel Cell Hybrid System

2019 ◽  
Author(s):  
Alessio Abrassi ◽  
Alberto Traverso ◽  
David Tucker ◽  
Eric Liese
Keyword(s):  
Fuel Cell ◽  
Gas Turbine ◽  
Cell System ◽  
Open Loop ◽  
Operating Conditions ◽  
Micro Gas Turbine ◽  
Performance Pressure ◽  
Lumped Parameter ◽  
Turbine Shaft ◽  
And Performance

Abstract A dynamic model is developed for a Micro Gas Turbine (MGT), characterized by an intrinsic free-spool configuration, coupled to large volumes. This is inspired by an experimental facility at the National Energy Technology Laboratory (NETL) called Hyper, which emulates a hybrid MGT and Fuel Cell system. The experiment and model can simulate stable and unstable operating conditions. The model is used to investigate the effects of different volumes on surge events, and to test possible strategies to safely avoid or recover from unstable compressor working conditions. The modelling approach started from the Greitzer lumped parameter approach, and it has been improved with integration of empirical methods and simulated components to better match the real Hyper plant layout and performance. Pressure, flow rate, and frequency plots are shown for the surge behavior comparing two different volume sizes, for cases where gas turbine shaft speed is uncontrolled (open loop) and controlled (closed loop). The ability to recover from a surge event is also demonstrated.

scholarly journals Multiobjective Optimal Controlled Variable Selection for a Gas Turbine–Solid Oxide Fuel Cell System Using a Multiagent Optimization Platform

2020 ◽  
Vol 59 (45) ◽  
pp. 20058-20070
Author(s):  
Temitayo Bankole ◽  
Debangsu Bhattacharyya ◽  
Paolo Pezzini ◽  
Berhane Gebreslassie ◽  
Nor Farida Harun ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Variable Selection ◽  
Solid Oxide Fuel Cell ◽  
Gas Turbine ◽  
Cell System ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Fuel Cell System ◽  
Selection For

Performance Simulation of a Hybrid Micro Gas Turbine Fuel Cell System Based on Existing Components

2011 ◽  
Author(s):  
D. P. Bakalis ◽  
A. G. Stamatis
Keyword(s):  
Fuel Cell ◽  
Gas Turbine ◽  
System Performance ◽  
Cell System ◽  
Operating Conditions ◽  
Optimum Operating ◽  
Utilization Factor ◽  
Micro Gas Turbine ◽  
Wide Range ◽  
Using Data

The objective of this work is the development of a simulation model for a hybrid Solid Oxide Fuel Cell (SOFC)/Micro Gas Turbine (MGT) system, flexible and robust enough, capable to predict the system performance under various operating conditions. The hybrid system consists of a high temperature SOFC, based on a tubular configuration developed by Siemens Power Generation Inc, and a recuperated small gas turbine (GT) validated using data for the Capstone C30. The design and off-design performance of the system is examined by means of performance maps. Moreover, operating parameters such as fuel utilization factor, steam to carbon ratio and current density are varied over a wide range and the influence on system performance is studied. The optimum operating conditions are discussed with regard to overall system performance under part load operation. The results show that high electrical efficiencies can be achieved making these systems appropriate for distributed generation applications.

Comparison of a Multi-Megawatt High Temperature Fuel Cell System With Reciprocating Engines and Aero-Derivative Gas Turbines

2008 ◽  
Author(s):  
Georgia C. Karvountzi ◽  
Paul F. Duby
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Gas Turbine ◽  
Hybrid System ◽  
Gas Turbines ◽  
Cell System ◽  
Combined Cycle ◽  
Simple Cycle ◽  
Fuel Cell System

High temperature fuel cells can be successfully integrated in a simple cycle or in a combined cycle configuration and achieve lower heating value (LHV) efficiencies greater than gas turbines and reciprocating engines. A simple cycle fuel cell system reaches 50 to 51% LHV efficiencies. A fuel cell system integrated with gas and steam turbines in a hybrid system could lead to LHV efficiencies of 70% to 72%. An aero-derivative gas turbine that is the most efficient simple cycle gas turbine achieves 40% to 46% thermal efficiency and a new generation reciprocating engine 39% to 42%. Upon integration in a combined cycle configuration with steam injection, aero-derivative gas turbines potentially reach LHV efficiencies of 55% to 58%. The purpose of the present paper is to compare initially the performance of a stand alone fuel cell with a stand alone gas turbine and a stand alone reciprocating engine. Then the fuel cell is integrated in a hybrid system and it is compared with a gas turbine combined cycle plant. The system sizes explored are 5MW in the stand alone case, and 20MW, 30MW, 60MW, 100MW and 200MW in the hybrid / combined cycle case. The performance of the hybrid system was reviewed under different ambient temperatures (0° F–90° F) and site elevations (0 ft–3000 ft). High temperature fuel cells are more efficient and have lower emissions than gas turbines and reciprocating engines. However fuel cells cannot be used for peak power generation due to long start-up time or load following applications.

A Portable Fuel Cell System Using Activated Aluminum

2012 ◽  
Vol 132 (10) ◽  
pp. 997-1002 ◽  
Author(s):  
Koji Maekawa ◽  
Kenji Takahara ◽  
Toshinori Kajiwara
Keyword(s):  
Fuel Cell ◽  
Cell System ◽  
Fuel Cell System
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