Analyzing microcogeneration systems based on LT-PEMFC and HT-PEMFC by energy balances

Jannelli, Elio; Minutillo, Mariagiovanna; Perna, Alessandra

doi:10.1016/j.apenergy.2013.02.067

Cited by 111 publications

(47 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PEMFCs-batteries and PEMFC-CHP (combined heat and power) systems are emerging technologies for hybrid automotive and residential applications benefited from their flexibility and scalability [5][6][7][8]. Although significant improvements on PEMFC performance have been achieved over the decades, sluggish oxygen reduction reaction (ORR) occurred in the cathode catalyst layer (CCL) and inadequate membrane hydration are hampering to achieve the full potential of PEMFCs [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the optimum membrane/ionomer water content of PEMFCs: The interaction of Nafion® ionomer content and cathode relative humidity

et al. 2015

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the optimum membrane/ionomer water content of PEMFCs: The interaction of Nafion® ionomer content and cathode relative humidity

et al. 2015

View full text Add to dashboard Cite

“…In addition, limited studies have been performed by considering balance of plant (BOP) components and combined power and heat production (CHP) for PEMFC [8][9][10]. However, it is required to evaluate the system efficiency more accurately by considering the thermal power for preheating and humidification, and the compression work for BOP components.…”

Section: Extended Abstractmentioning

confidence: 99%

System Efficiency of Proton Exchange Membrane Fuel Cell for Emergency Power Supply System

Jeon¹,

Kim²,

Lee³

2017

World Congress on Mechanical, Chemical, and Material Engineering

View full text Add to dashboard Cite

Extended AbstractProton exchange membrane fuel cells (PEMFCs) have been widely used in various applications due to its advantages of high power density, rapid start-up, and high efficiency [1]. Especially, the PEMFC can be applied in an emergency power supply system such as high-rise building and complex facilities. The emergency power supply is very important in the high-rise building and complex facilities because a normal source of power can be failed during urgent disaster situations.There have been a lot of advances in the development of low temperature PEMFC. Recently, to overcome the problem of water flooding, high temperature PEMFC has been highlighted [2][3][4]. However, very large amount of water vapor is required to humidify PEMFC at the elevated temperature because saturation water vapor pressure increases exponentially with temperature. Therefore, it is necessary to analyze the performance of the high temperature PEMFC under various humidity conditions in terms of system efficiency.There has been a lot of studies to investigate the effect of temperature and relative humidity on the performance of PEMFC [5][6][7]. In addition, limited studies have been performed by considering balance of plant (BOP) components and combined power and heat production (CHP) for PEMFC [8][9][10]. However, it is required to evaluate the system efficiency more accurately by considering the thermal power for preheating and humidification, and the compression work for BOP components. In this study, to overcome the limitations of the previous study, three-dimensional computational fluid dynamics simulation was conducted. A unit cell with serpentine flow field was simulated, and compression work was considered for the BOP component together with the heat for preheating and humidification. The operating conditions were optimized using response surface methodology by considering both fuel cell output and system efficiency, and the amount of each energy component was analyzed. In addition, the effects of operating parameters such as temperature, relative humidity, and stoichiometric ratio on fuel cell power, system efficiency, and each energy component were investigated.As a result, the optimal operating conditions were 90.6 °C and 100.0% for the temperature and relative humidity, respectively, and 0.27 for stoichiometric ratio. In addition, at the optimal condition, the power output was 1.28 W and the system efficiency was 15.8%. The optimal condition showed a comparatively high system efficiency with allowable power output. In addition, the power output increased with the operating temperature, but the system efficiency decreased significantly because of exponentially increasing saturation vapor pressure and thermal energy for preheating/humidification. The system efficiency can be more effectively improved by increasing relative humidity rather than increasing operating temperature, because the ionic conductivity of the membrane is greatly affected by the relative humidity.

show abstract

“…In the last years an important effort has been done to develop models for fuel cells [8], [9], [10], [11]. In the following a new model for a HTPEMFC is deduced.…”

Section: Fuel Cell System Modelsmentioning

confidence: 99%

Modeling and control of HTPEMFC based combined heat and power for confort control

Martínez

Serra

Costa‐Castelló

2017

2017 22nd IEEE International Conference on Emerging Technologies and Factory Automation (ETFA)

View full text Add to dashboard Cite

show abstract

Analyzing microcogeneration systems based on LT-PEMFC and HT-PEMFC by energy balances

Cited by 111 publications

References 47 publications

Numerical analysis of the optimum membrane/ionomer water content of PEMFCs: The interaction of Nafion® ionomer content and cathode relative humidity

Numerical analysis of the optimum membrane/ionomer water content of PEMFCs: The interaction of Nafion® ionomer content and cathode relative humidity

System Efficiency of Proton Exchange Membrane Fuel Cell for Emergency Power Supply System

Modeling and control of HTPEMFC based combined heat and power for confort control

Contact Info

Product

Resources

About