Cathode Pressure Modeling of the Buckeye Bullet II 540 kW Hydrogen Fuel Cell System

2010 ◽  
Author(s):  
Edward Hillstrom ◽  
Marcello Canova ◽  
Yann Guezennec ◽  
Giorgio Rizzoni
Keyword(s):  
Fuel Cell ◽  
Dynamic Models ◽  
Model Development ◽  
Control Level ◽  
Liquid Product ◽  
Cell System ◽  
Fuel Cell Vehicle ◽  
Hydrogen Fuel Cell ◽  
Fuel Cell System ◽  
Pressure Dynamics

This paper applies a well published control level model for fuel cell system dynamics to the unique fuel cell system of the world’s fastest fuel cell vehicle, the Buckeye Bullet 2. The goal is to develop a system model to predict the pressure dynamics of the cathode system so the cathode can be operated at maximum allowable pressure to provide maximum performance. The details of how the model must be modified to fit the unique fuel cell system are provided. The results of the initial implementation show several shortcomings when the published model is implemented. The largest problems are found to be with how the model treats the liquid product water that is generated. For this reason, modifications are implemented to attempt to improve the correlation between the model and collected data. The results show partial improvements in 3 areas of performance, indicating that more accurate dynamic models are needed to fully characterize the phenomena. Further model development and testing are planned based on the initial results.

Investigation of Predictive Control of Pure-Hydrogen Fuel Cell System Behavior by Dynamic Models

2018 ◽  
Vol 2018.93 (0) ◽  
pp. 812
Author(s):  
Takehiko ISE ◽  
Yoshito USUKI ◽  
Miki DOHKOSHI ◽  
Junji MORITA ◽  
Akinori YUKIMASA ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Predictive Control ◽  
Dynamic Models ◽  
Cell System ◽  
Pure Hydrogen ◽  
Hydrogen Fuel Cell ◽  
Hydrogen Fuel ◽  
System Behavior ◽  
Fuel Cell System

scholarly journals Improved Voltage Drop Compensation Method for Hybrid Fuel Cell Battery System

Electronics ◽  
2018 ◽  
Vol 7 (11) ◽  
pp. 331 ◽  
Author(s):  
Tae-Ho Eom ◽  
Jin-Wook Kang ◽  
Jintae Kim ◽  
Min-Ho Shin ◽  
Jung-Hyo Lee ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Voltage Drop ◽  
Cell System ◽  
Compensation Method ◽  
Pure Hydrogen ◽  
Hydrogen Fuel Cell ◽  
Hydrogen Fuel ◽  
Fuel Cell System ◽  
Output Current ◽  
Battery System

In this paper, a voltage drop compensation method for hybrid hydrogen fuel cell battery system, with a hydrogen recirculation powering a forklift, is studied. During recirculating hydrogen fuel to recycle hydrogen that has not reacted enough at the system, impurities can be mixed with the hydrogen fuel. This leads to low hydrogen concentration and a drop in the output voltage of the fuel cell system. In excessive voltage drop, the fuel cell system can be shutdown. This paper proposes a voltage drop compensation method using an electrical control algorithm to prevent system shutdown by reducing voltage drop. Technically, voltage drop is typically caused by three kinds of factors: (1) The amount of pure hydrogen supply; (2) the temperature of fuel cell stacks; and (3) the current density to catalysts of the fuel cell. The proposed compensation method detects voltage drop caused by those factors, and generates compensation signals for a controller of a DC–DC converter connecting to the output of the fuel cell stack; thus, the voltage drop is reduced by decreasing output current. At the time, insufficient output current to a load is supplied from the batteries. In this paper, voltage drop caused by the abovementioned three factors is analyzed, and the operating principle of the proposed compensation method is specified. To verify this operation and the feasibility of the proposed method, experiments are conducted by applying it to a 10 kW hybrid fuel cell battery system for a forklift.

Definition and Cost Evaluation of Fuel Cell Bus and Passenger Vehicle Power Plants

2014 ◽  
Author(s):  
Brian D. James ◽  
Jennie M. Moton ◽  
Whitney G. Colella
Keyword(s):  
Fuel Cell ◽  
Cell System ◽  
Proton Exchange ◽  
Fuel Cell Vehicle ◽  
Pt Catalyst ◽  
Stoichiometric Ratio ◽  
Operating Pressure ◽  
Fuel Cell System ◽  
System Cost ◽  
Capital Costs

A design for manufacture and assembly (DFMA™) analysis is applied to future bus and automotive fuel cell vehicle (FCV) system designs. This DFMA™ analysis is used to identify (1) optimal fuel cell system (FCS) operating parameters for system cost minimization, (2) FCV designs appropriate for volume manufacture, (3) FCV manufacturing supply chain designs, (4) projected future capital costs of FCVs at varying manufacturing rates, and (5) primary cost drivers. This DFMA™ analysis focuses on the FCS drive train. It excludes fuel storage, the electric drive drain, and all other parts of the vehicle (chassis, exterior, etc.). These FCSs are envisioned to use low temperature proton exchange membrane (LT PEM) stacks to convert hydrogen fuel into electric power. Models are developed to minimize LT PEM fuel cell system costs by finding the cost optimal combination of (1) stack operating pressure, (2) cell voltage, (3) platinum (Pt) catalyst loading, (4) stoichiometric ratio of oxygen, and (5) coolant stack exit temperature. A multi-variable Monte Carlo sensitivity analysis indicates, with 90% confidence, that a FCS producing peak net 160 kilowatt-electric (kWe) for a bus application and produced at a rate of 1,000 FCS/year (yr) is expected to cost between $251/kWe and $334/kWe. Similarly, a peak net 80 kWe automotive FCS manufactured at a rate of 500,000 FCSs/year is estimated to cost between $51/kWe and $65/kWe, with 90% confidence. Total FCS costs are the sum of PEM stack and balance of plant (BOP) costs. The BOP components represent 32% of the bus FCS costs and 48% of the automotive system cost.

Sign in / Sign up

Export Citation Format

Share Document