Effects of process integration in an active direct methanol fuel-cell system

Zenith, Frederico; Na, Youngseung; Krewer, Ulrike

doi:10.1016/j.cep.2012.04.007

Cited by 5 publications

(12 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An avenue for future work is simplifying the two-mixer system with process integration, as was previously done with the reference system [14]. …”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Increasing Fuel Efficiency of Direct Methanol Fuel Cell Systems with Feedforward Control of the Operating Concentration

Zenith

Krewer

2015

Energies

Self Cite

View full text Add to dashboard Cite

Most of the R&D on fuel cells for portable applications concentrates on increasing efficiencies and energy densities to compete with other energy storage devices, especially batteries. To improve the efficiency of direct methanol fuel cell (DMFC) systems, several modifications to system layouts and operating strategies are considered in this paper, rather than modifications to the fuel cell itself. Two modified DMFC systems are presented, one with an additional inline mixer and a further modification of it with a separate tank to recover condensed water. The set point for methanol concentration control in the solution is determined by fuel efficiency and varies with the current and other process variables. Feedforward concentration control enables variable concentration for dynamic loads. Simulation results were validated experimentally with fuel cell systems.

show abstract

“…An avenue for future work is simplifying the two-mixer system with process integration, as was previously done with the reference system [14]. …”

Section: Discussionmentioning

confidence: 99%

“…Energy balance is the summation of each enthalpy of the components (T1.8). The methanol loss by evaporation in the degasser of the reference system is negligible compared to the electrochemical reaction and crossover and can be omitted [14]. The only component that can accumulate materials is the mixer in the system (T1.9).…”

Section: Peripheral Devicesmentioning

confidence: 99%

Increasing Fuel Efficiency of Direct Methanol Fuel Cell Systems with Feedforward Control of the Operating Concentration

Zenith

Krewer

2015

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

“…The model of the mingled-outlet system from the research of Zenith et al [16] assumed that liquid solution accumulates only in the mixer. This assumption is modified by adding a liquid hold-up in the anode channel of the stack.…”

Section: Modellingmentioning

confidence: 99%

“…The sharing time depends on methanol concentration in the mixer, and a way to estimate or measure methanol concentration is necessary. Without a concentration sensor, Zenith et al [16] got rid of two components by process integration of cathode and anode outlet (Fig. 1(b)) compared with a reference system (Fig.…”

Section: Introductionmentioning

confidence: 99%

Highly integrated direct methanol fuel cell systems minimizing fuel loss with dynamic concentration control for portable applications

Zenith

Krewer

2017

Journal of Process Control

Self Cite

View full text Add to dashboard Cite

“…They focused on reducing the high amount of methanol loss due to evaporation in the separator and mixer. Therefore, they modified their previous system, which they called "Mingled Outlet System" as described in a prior publication ( [23]) and called the new system as "Highly Integrated System". In their study, they compared both systems in terms of concentration, temperature, water recovery controllability, and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Simulation of a hybrid vehicle powertrain having direct methanol fuel cell system through a semi-theoretical approach

Karaoğlan

İnce

Çolpan

et al. 2019

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Different operating scenarios can be used in a hybrid system based on a direct methanol fuel cell (DMFC) and a battery. In this paper, a DMFC system model is integrated into a model formed for a hybrid vehicular system which consists of a battery, a DMFC stack and its auxiliary equipments; and the model is simulated in Matlab/Simulink environment using a quasistatic approach. An algorithm for the energy management of the system is also developed considering the state of charge (SOC) of the battery. In the DMFC system model, the current and empirical data for the polarization curves as well as methanol crossover and water crossover rates are taken as the input parameters, whereas the stack voltage, the remaining methanol in the fuel tank, and the power demand of auxiliary equipments are taken as the output parameters. In this model, the methanol consumption, and the water and CO2 production are found applying mass balances for each component of the system. The results of the simulations help to give more insights into the operation of a DMFC based hybrid system.

show abstract

Effects of process integration in an active direct methanol fuel-cell system

Cited by 5 publications

References 14 publications

Increasing Fuel Efficiency of Direct Methanol Fuel Cell Systems with Feedforward Control of the Operating Concentration

Increasing Fuel Efficiency of Direct Methanol Fuel Cell Systems with Feedforward Control of the Operating Concentration

Highly integrated direct methanol fuel cell systems minimizing fuel loss with dynamic concentration control for portable applications

Simulation of a hybrid vehicle powertrain having direct methanol fuel cell system through a semi-theoretical approach

Contact Info

Product

Resources

About