Direct coupling photovoltaic power regulator for stand-alone power systems with hydrogen generation

Garrigós, A.; Blanes, J. M.; Rubiato, J.; Avila, Eduardo; Garcia, Covadonga; Lizan, J. L.

doi:10.1016/j.ijhydene.2010.07.127

Cited by 14 publications

(4 citation statements)

References 28 publications

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“…Generally, the efficiency of a MPP controller is about 95%, the storage battery efficiency is about 90% and the efficiency of a DC/DC converter is about 90% [10], so the overall enroximately:…”

Section: Direct Coupling Pv-hydrogen Systems Compared To Conventimentioning

confidence: 99%

Theoretical study on direct coupling of a PV array to a PEM electrolyser

Liu

2013

2013 International Conference on Materials for Renewable Energy and Environment

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Hydrogen is the most potential clean energy in the twenty-first century and can be obtained by the electrolysis of water. As a secondary energy, its production would be restricted by large amount of energy consumption and low efficiency. It is advantageous if an electrolyser can be simply and efficiently coupled to a renewable source of electrical energy. In this paper, it investigated the optimal way to maximize the transference of energy from a photovoltaic (PV) array directly coupled to a polymer electrolyte membrane (PEM) electrolyser in a photovoltaicelectrolyte hydrogen generation system (PV-hydrogen system). The pivotal strategy is to find the series-parallel combination of the PV cells and electrolyser stacks, which produces the highest energy transfer efficiency. The optimal configuration is a PV array consisted of three parallelconnected PV cells directly coupled to a PEM electrolyser consisted of twelve series-connected electrolyser stacks with a day energy transfer efficiency of 99.52%. Comparisons between direct coupling systems and conventional ones have been presented. The result shows that direct coupling technology is feasible to improve the energy transfer efficiency in a PV-hydrogen system.

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Section: Direct Coupling Pv-hydrogen Systems Compared To Conventimentioning

confidence: 99%

Theoretical study on direct coupling of a PV array to a PEM electrolyser

Liu

2013

2013 International Conference on Materials for Renewable Energy and Environment

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“…The fail-safe operation of electrolyser with multiple levels of safety and operational redundancy is designed [13]. In 2010, the operation of directly coupled PV power regulator for stand-alone power systems with hydrogen generation is evaluated [14]. Few studies have tried to find the optimal operational set points and size of directly coupled PV-electrolyser.…”

Section: Introductionmentioning

confidence: 99%

Multi-level optimization approach for directly coupled photovoltaic-electrolyser system

Khalilnejad

Abbaspour

Sarwat

2016

International Journal of Hydrogen Energy

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Available online xxxKeywords: PhotovoltaicAdvanced alkaline electrolyser GA optimization Hydrogen production Directly coupled system a b s t r a c t In this study, directly coupled photovoltaic-electrolyser system is designed and optimized and a new method for optimization is given. The accurate electrical models of advanced alkaline electrolyser, photovoltaic system, and hydrogen storage tank are simulated using Matlab. The system is investigated for a day using actual meteorological data of Miami, FL.The purpose of the optimization, which has been performed using genetic algorithm, is to produce maximum hydrogen, minimum excess power, and minimum energy transfer loss.In each iteration of the optimization, due to crucial role of temperature in overall performance of the system, the average operating temperature is optimized using genetic algorithm. The system is optimized in a way that the operating condition is as close as possible to the maximum power point of the photovoltaic array. The operation of the system is discussed in 24 h period and working hours to make the system comparable to other studies with different power sources. The result of the analysis shows that optimal system for a 10 kW electrolyser can produce the average hydrogen of 0.0151 mol/s when the system is operating with 2.2% power loss and 4.7% power transfer loss.

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“…A 2009 study designed a directly coupled PV system with a Proton Exchange Membrane (PEM) electrolyzer with multiple levels of safety and operational redundancy to demonstrate the system's fail-safe functioning [13]. While a 2010 evaluation designed and analyzed the operation of a directly coupled PV power regulator for standalone hydrogen generation power systems [14], a few other initiatives have shed light on the estimation of the optimal operational set points and size of the directly coupled PV-electrolyzer. Reference [15] presented a directly coupled PV-PEM electrolyzer to relatively size the components based on simple modeling of both polarization curves.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of optimal photovoltaic-electrolyzer system with the purpose of maximum Hydrogen storage

Khalilnejad

Sundararajan

2016

2016 IEEE/IAS 52nd Industrial and Commercial Power Systems Technical Conference (I&CPS)

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Power electronics-based electrolyzer systems are prevalently in current use. This paper proposes the more recently employed directly coupled photovoltaic (PV) electrolyzer systems. Equipped with accurate electrical models of the advanced alkaline electrolyzer, PV system and Hydrogen storage tank simulated using MATLAB, the system's performance for a full week is analyzed using Miami, Florida's meteorological data. A multi-level Genetic Algorithm (GA)based optimization facilitates maximum hydrogen production, minimum excess power generation, and minimum energy transfer loss. The crucial effect of temperature on the overall system performance is also accounted for by optimizing this parameter using GA, maintaining operating conditions close to the Maximum Power Point (MPP) of the PV array. The results of the analysis have been documented to show that the optimal system for a 10 kW electrolyzer can produce, on an average, Hydrogen of 0.0176 mol/s, when the system is operating with 6.3% power loss and 2.4% power transfer loss.

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Direct coupling photovoltaic power regulator for stand-alone power systems with hydrogen generation

Cited by 14 publications

References 28 publications

Theoretical study on direct coupling of a PV array to a PEM electrolyser

Theoretical study on direct coupling of a PV array to a PEM electrolyser

Multi-level optimization approach for directly coupled photovoltaic-electrolyser system

Performance evaluation of optimal photovoltaic-electrolyzer system with the purpose of maximum Hydrogen storage

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