scholarly journals Performance Assessment of a Hybrid System with Hydrogen Storage and Fuel Cell for Cogeneration in Buildings

2020 ◽  
Vol 12 (12) ◽  
pp. 4832 ◽  
Author(s):  
Sofia Boulmrharj ◽  
Mohammed Khaidar ◽  
Mohamed Bakhouya ◽  
Radouane Ouladsine ◽  
Mostapha Siniti ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Hybrid System ◽  
Thermal Energy ◽  
Fossil Fuels ◽  
Proton Exchange Membrane ◽  
Raw Materials ◽  
Renewable Energy Sources ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Photovoltaic System

The search for new fuels to supersede fossil fuels has been intensified these recent decades. Among these fuels, hydrogen has attracted much interest due to its advantages, mainly cleanliness and availability. It can be produced from various raw materials (e.g., water, biomass) using many resources, mainly water electrolysis and natural gas reforming. However, water electrolysis combined with renewable energy sources is the cleanest way to produce hydrogen while reducing greenhouse gases. Besides, hydrogen can be used by fuel cells for producing both electrical and thermal energy. The aim of this work was towards efficient integration of this system into energy efficient buildings. The system is comprised of a photovoltaic system, hydrogen electrolyzer, and proton exchange membrane fuel cell operating as a cogeneration system to provide the building with both electricity and thermal energy. The system’s modeling, simulations, and experimentations were first conducted over a short-run period to assess the system’s performance. Reported results show the models’ accuracy in analyzing the system’s performance. We then used the developed models for long-run testing of the hybrid system. Accordingly, the system’s electrical efficiency was almost 32%. Its overall efficiency reached 64.5% when taking into account both produced electricity and thermal energy.

scholarly journals Generic Dynamical Model of PEM Electrolyser under Intermittent Sources

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6556
Author(s):  
Sumit Sood ◽  
Om Prakash ◽  
Mahdi Boukerdja ◽  
Jean-Yves Dieulot ◽  
Belkacem Ould-Bouamama ◽  
...  
Keyword(s):  
Experimental Data ◽  
Proton Exchange Membrane ◽  
Renewable Energy Sources ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Laboratory Scale ◽  
Dynamical Model ◽  
Percentage Error ◽  
Parameter Values ◽  
Electrolysis System

Proton Exchange Membrane (PEM) water electrolysis system is one of the promising technologies to produce green hydrogen from renewable energy sources (wind and solar). However, performance and dynamic analysis of PEM water electrolysis systems are challenging due to the intermittent nature of such sources and involved multi-physical behaviour of the components and subsystems. This study proposes a generic dynamical model of the PEM electrolysis system represented in a modular fashion using Bond Graph (BG) as a unified modelling approach. Causal and functional properties of the BG facilitate the formal PEM electrolyser model to adapt and to fit the different configurations of the electrolyser ranging from laboratory scale to industrial scale. The system-specific key parameter values are identified optimally for a laboratory-scale electrolyser system running on a multi-source energy platform using experimental data. The mean absolute percentage error between simulation and experimental data is found to be less than 5%. The performance characteristic curves of the electrolyser are predicted at different operating temperatures using the identified key parameters. The predicted performance is in good agreement with the expected behaviour of the electrolyser found in the literature. The model also estimates the different energy losses and the real-time efficiency of the system under dynamic inputs. With these capabilities, the developed model provides an economical mean for design, control, and diagnosis development of such systems.

Numerical Study on Proton Exchange Membrane Fuel Cell with 2mm×2mm and 25cm2 Serpentine Flow Channel

2014 ◽  
Vol 592-594 ◽  
pp. 1687-1691
Author(s):  
Pal Vaibhav ◽  
P. Karthikeyan ◽  
R. Anand
Keyword(s):  
Fuel Cell ◽  
Flow Field ◽  
Fossil Fuels ◽  
Proton Exchange Membrane ◽  
Numerical Study ◽  
Proton Exchange ◽  
Three Dimensional Model ◽  
Serpentine Flow Field ◽  
Exchange Membrane ◽  
Flow Field Design

As fossil fuels are becoming less reliable and more costly, the Proton Exchange Membrane Fuel Cell (PEMFC) is emerging as the primary candidate to replace the stationary and transport applications. In this study numerical simulation on PEMFC is done by commercially available Computational Fluid Dynamics (CFD) software. A three-dimensional, model of a single PEM Fuel cell with serpentine flow field design has been used for the study. The numerical model is 3-D steady, incompressible, single phase and isothermal includes the governing of mass, momentum, energy, and species along with electrochemical equations. All of these equations are simultaneously solved in order to get current flux density and H2, O2and H2O fractions along the flow field design.

scholarly journals Possibilities of Using Fuel Cells for Energy Generation in Agricultural Greenhouses: A Case Study in Crete, Greece

2019 ◽  
Vol 11 (8) ◽  
pp. 113
Author(s):  
John Vourdoubas
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Renewable Energy Sources ◽  
Specific Energy Consumption ◽  
Energy Generation ◽  
Proton Exchange ◽  
Photovoltaic System ◽  
Low Carbon ◽  
Solar Pv ◽  
Solar Photovoltaics

The possibility of using fuel cells powered by solar hydrogen for energy generation in greenhouses with reference to the island of Crete, Greece has been examined. Change of fossil fuels used in greenhouses with renewable energies and sustainable energy technologies is very important for mitigation of climate change. Various renewable energy sources and low carbon emission technologies including geothermal energy, biomass, solar photovoltaics and co-generation systems have been used so far. Use of solar photovoltaics for generating electricity consumed in water electrolysis for hydrogen production has been investigated. Hydrogen feeding a proton exchange membrane fuel cell co-generating electricity and heat was used in a greenhouse located in Crete, Greece. The system could be useful in a stand-alone greenhouse with annual specific energy consumption at 150 KWh/m2. A solar photovoltaic system with nominal power at 33.33 KWp powering an electrolytic cell at 5.71 KW could produce annually 2,083 kg hydrogen. The hydrogen could feed a fuel cell at 1.71 KWel generating annually all the electricity required in a greenhouse of 1,000 m2. Co-produced heat could also cover 11.11% of the annual heat requirements in the greenhouse. It was found though that the overall electric efficiency of the system was very low at 4.5%. The low overall efficiency and the size of the solar-PV required indicate that the abovementioned energy system is not suitable in commercial agricultural greenhouses.

scholarly journals Hydrogen Production through a Solar Powered Electrolysis System

2019 ◽  
pp. 1-14
Author(s):  
Deborah A. Udousoro ◽  
Cliff Dansoh
Keyword(s):  
Hydrogen Production ◽  
Proton Exchange Membrane ◽  
Renewable Energy Sources ◽  
Proton Exchange ◽  
Photovoltaic System ◽  
Photovoltaic Module ◽  
Production Of Hydrogen ◽  
Solar Powered ◽  
Exchange Membrane ◽  
Electrolysis System

Production of hydrogen from renewable energy sources is gaining recognition as one of the best energy solutions without ecological drawbacks. The present study reports hydrogen production through a solar powered electrolysis system as a means to curtail greenhouse gas emissions in the United Kingdom. The solar powered electrolysis unit is modeled to provide 58400 kg of hydrogen to run the fuel cell bus fleet in Lea interchange garage in London on a yearly basis. Experiments were conducted to determine the efficiency of the photovoltaic module and the proton exchange membrane electrolyzer. An energy balance of the electrolysis unit was calculated to give 47.82 kWh/kg and used to model a 2.98 MW photovoltaic system required to run the electrolysis process.

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