scholarly journals Analysis of Financial Risk and Ventilation Effect in the Hydrogen Fuel Cell System

2012 ◽  
Vol 23 (1) ◽  
pp. 85-114
Author(s):  
이중희 ◽  
이홍주 ◽  
김태옥 ◽  
Lee In Bok ◽  
MyungHwan Hwang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Financial Risk ◽  
Cell System ◽  
Hydrogen Fuel Cell ◽  
Hydrogen Fuel ◽  
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.

Development of an Evaporatively Cooled Hydrogen Fuel Cell System and its Vehicle Application

2013 ◽  
Author(s):  
Alan Warburton ◽  
Dave Mossop ◽  
Ben Burslem ◽  
Pratap Rama ◽  
Paul Adcock ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Cell System ◽  
Hydrogen Fuel Cell ◽  
Hydrogen Fuel ◽  
Fuel Cell System

405 A Study of a Variable Ejector for the Hydrogen Fuel Cell System

2005 ◽  
Vol 2005 (0) ◽  
pp. 47
Author(s):  
Toshiaki Setoguchi ◽  
Heuy Dong Kim ◽  
Shigeru Matsuo
Keyword(s):  
Fuel Cell ◽  
Cell System ◽  
Hydrogen Fuel Cell ◽  
Hydrogen Fuel ◽  
Fuel Cell System

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
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