Thermodynamic modeling and exergy analysis of proton exchange membrane fuel cell power system

Liu, Guokun; Qin, Yanzhou; Yin, Yifan; Bian, Xianzu; Kuang, Changchun

doi:10.1016/j.ijhydene.2019.08.203

Cited by 42 publications

(36 citation statements)

References 36 publications

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“…The temperature rise of both gases and coolant in the stack is fixed at 10 K, and the pressure drop is fixed at 0.2 atm [60]. (5) Energy loss and exergy losses during the gas flow are not considered [63]. (6) All the heat generated by the stack is carried away by the coolant [63].…”

Section: System Descriptionmentioning

confidence: 99%

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Thermodynamic Modeling and Performance Analysis of Vehicular High-Temperature Proton Exchange Membrane Fuel Cell System

et al. 2022

Membranes

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Since the high temperature proton exchange membrane fuel cells (HT-PEMFC) stack require a range of auxiliary equipments to maintain operating conditions, it is necessary to consider operation of related components in the design of HT-PEMFC systems. In this paper, a thermodynamic model of a vehicular HT-PEMFC system using phosphoric acid doped polybenzimidazole membrane is developed. The power distribution and exergy loss of each component are derived according to thermodynamic analysis, where the stack and heat exchanger are the two components with the greatest exergy loss. In addition, ecological functions and improvement potentials are proposed to evaluate the system performance better. On this basis, the effects of stack inlet temperature, pressure, and stoichiometric on system performance are analyzed. The results showed that the energy efficiency, exergy efficiency and net output power of the system achieved the maximum when the inlet gases temperature is 406.1 K. The system performance is better when the cathode inlet pressure is relatively low and the anode inlet pressure is relatively high. Moreover, the stoichiometry should be reduced to improve the system output performance on the basis of ensuring sufficient gases reaction in the stack.

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Section: System Descriptionmentioning

confidence: 99%

“…(5) Energy loss and exergy losses during the gas flow are not considered [63]. (6) All the heat generated by the stack is carried away by the coolant [63].…”

Section: System Descriptionmentioning

confidence: 99%

Thermodynamic Modeling and Performance Analysis of Vehicular High-Temperature Proton Exchange Membrane Fuel Cell System

et al. 2022

Membranes

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“…The electrochemical model of PEMFC can also be embodied into corresponding FTT model for thermodynamic performance analysis and optimization to pursue maximum performances under operation conditions. Currently, typical optimal FTT objective functions include exergy loss [22], exergy efficiency [23][24][25][26], ecological performance coefficient [14,20,[26][27][28][29][30][31][32][33][34][35][36], ecological function [14] and entropy production rate [22,26]. Watowich et al [37] used the optimal control theory to determine the limit of the fuel cell operation process.…”

Section: Introductionmentioning

confidence: 99%

“…Sieniutycz et al [38,39] established a steady-state model of the fuel cell and predicted the maximum power output from the perspective of thermodynamic optimization. Liu et al [25] developed a PEMFC power system and established a FTT model including exergy destruction, exergy efficiency and ecological function et. al.…”

Section: Introductionmentioning

confidence: 99%

Exergetic Performance Coefficient Analysis and Optimization of a High-Temperature Proton Exchange Membrane Fuel Cell

et al. 2022

Membranes

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Performance of a high-temperature proton exchange membrane fuel cell (HT-PEMFC) and the influence of different parameters on HT-PEMFC is analyzed in this study. Firstly, mathematical expression for energy efficiency, power density, exergy destruction and exergetic performance coefficient (EPC) are derived. Then, the relationship between the dimensionless power density, exergy destruction rate, exergetic performance coefficient (EPC) and energy efficiency is compared. Furthermore, the effect of flow rate, doping level, inlet pressure and film thickness are considered to evaluate the performance of HT-PEMFC. Results show that EPC not only considers exergetic loss rate to minimize exergetic loss, but also considers the power density of HT-PEMFC to maximize its power density and improve its efficiency, so EPC represents a better performance criterion. In addition, increasing inlet pressure and doping level can improve EPC and energy efficiency, respectively.

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“…The two-dimensional heat and mass transfer, entropy generation, and exergy destruction models of the membrane contactor are established and numerically solved and experimentally verified. Liu et al [28] developed a mathematical thermodynamic model of a proton exchange membrane fuel cell system to uncover the energy and exergy distribution and establish an evaluation method for the system. In addition, some studies use energy and exergy to investigate the thermodynamics of the membrane dehumidifier.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Energy and Exergy Analysis of a Counter Hollow Fiber Membrane-based Humidifier

He¹,

Liang²

2020

IJEPE

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The counter hollow fiber membrane-based humidifier is used for air humidification, which avoids the problem of liquid droplets carryover in traditional liquid humidification technology. In this study, an experimental rig was established for the hollow fiber membrane humidification system. The effects of air mass flow rate, air temperature, air relative humidity, water mass flow rate, water temperature on air humidity ratio increase, air temperature difference, power consumption per unit of humidification, humidification efficiency, energy efficiency, exergy destruction and exergy efficiency were experimentally investigated using the energy and exergy method. The results reveal the enhancement of the exergy efficiency with the increase in inlet air relative humidity, inlet air dry bulb temperature, air mass flow rate, and water mass flow rate. The results show that the humidification performance of the system is strongly influenced by the water temperature, while the humidification effect is more significant for the low temperature and low air humidity. It was found that as the relative humidity and dry bulb temperature of the air increased, the exergy destruction decreased significantly and the exergy efficiency increased. Increasing the air mass flow rate and water flow temperature resulted in an increase in both exergy destruction and exergy efficiency, while increasing the water flow rate had little effect on exergy destruction and fire efficiency. The exergy efficiency of the system ranged from 0.37 to 0.71. The maximum exergy destruction was 3.74 W, which occurred at air RH a,1 =30%, air temperature T a,1 =30°C, water temperature T w,1 =28°C, and air and water flow rates of 32 kg/h and 7 kg/h, respectively. The humidification efficiency of the system ranged from 0.712 to 0.925, and the power consumption per unit of humidification ranged from 0.94 g/(h•W) to 12.50 g/(h•W).

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Thermodynamic modeling and exergy analysis of proton exchange membrane fuel cell power system

Cited by 42 publications

References 36 publications

Thermodynamic Modeling and Performance Analysis of Vehicular High-Temperature Proton Exchange Membrane Fuel Cell System

Thermodynamic Modeling and Performance Analysis of Vehicular High-Temperature Proton Exchange Membrane Fuel Cell System

Exergetic Performance Coefficient Analysis and Optimization of a High-Temperature Proton Exchange Membrane Fuel Cell

Experimental Study on Energy and Exergy Analysis of a Counter Hollow Fiber Membrane-based Humidifier

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