Optimum energy storage techniques for the improvement of renewable energy sources-based electricity generation economic efficiency

Kaldellis, J.K.; Zafirakis, D.

doi:10.1016/j.energy.2007.07.009

Cited by 209 publications

(73 citation statements)

References 17 publications

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“…Comparison with fuel cells is also very favourable to the system proposed here. Fuel cells show good efficiencies (60-80%) [10], although these efficiencies are dramatically compromised by the previous generation of H 2 [31,32], which diminishes the global efficiency of fuel cells to values of around 20-45%, lower than those achieved by the system proposed in this study. This represents a significant achievement given that the values reported in this work were obtained at lab-scale with devices that were not optimized for energy efficiency.…”

Section: Figurementioning

confidence: 70%

New concept for energy storage: Microwave-induced carbon gasification with CO2

Bermúdez

Ruisánchez

Arenillas

et al. 2014

Energy Conversion and Management

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Energy storage is a topic of great importance for the development of renewable energy, since it appears to be the only solution to the problem of intermittency of production, inherent to such technologies. In this paper, a new technology for energy storage, based on microwave-induced CO 2 gasification of carbon materials is proposed. The tests carried out in this study on different carbon materials showed that charcoal consumes the least amount of energy. Two microwave heating mechanisms, a single-mode oven and a multimode device, were evaluated with the latter proving itself to be the more efficient in terms of energy consumption and recovery. The initial results obtained showed that this technology is able to achieve energy efficiencies of 45% at laboratory scale with every indication that these results can be improved upon to make this approach highly competitive against other energy storage technologies.

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Section: Figurementioning

confidence: 70%

New concept for energy storage: Microwave-induced carbon gasification with CO2

Bermúdez

Ruisánchez

Arenillas

et al. 2014

Energy Conversion and Management

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“…We make the hypothesis that the system has no classical supply i.e. a group diesel generator [10,11]. When energy level is deficient, the stand-alone wind power system can not ensure the balance between produced powers and powers required by the load.…”

Section: The Structure Of a Low Power Wind Systemmentioning

confidence: 99%

Stand-alone wind power system operating with a specific storage structure

Druga¹,

Nichita²,

Barakat³

et al. 2009

REPQJ

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Abstract.In this paper we analyze a low power wind system operating in autonomous mode. We present a control structure that ensures the maximization of wind energy conversion and the balance between required and produced power. We have studied two stand alone wind system structures based on the capacitor voltage control and the buffer battery operation. The simulation results have been obtained in Matlab/Simulink environment, using PowerSim toolbox.

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“…Energy storage technologies promote the RES penetration, by facilitating the self consumption of the locally produced electricity, by increasing its values and by mitigation of the negative externalities (Kaldellis and Zafirakis, 2007;Beaudin et al, 2010;Poullikkas, 2013). In fact, in presence of a sufficient storage capacity, renewable energy from distributed generation plants can be stored during peak production hours to be utilized during high demand hours rather then being sold to the grid or wasted.…”

Section: Introductionmentioning

confidence: 99%

Smart integration of photovoltaic production, heat pump and thermal energy storage in residential applications

et al. 2019

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The optimal design of distributed generation systems is of foremost importance to reduce fossil fuel consumption and mitigate the environmental impact of human activities in urban areas. Moreover, an efficient and integrated control strategy is needed for each of the components of a distributed generation plant, in order to reach the expected economic and environmental performances.In this paper, the transition from natural gas to electricity-based heating is evaluated for residential applications, considering the interplay between photovoltaic electricity produced on site and the thermal energy storage, to grant the optimal management of heating devices. The energy demand of an apartment building, under different climatic conditions, is taken as a reference and four power plant solutions are assessed in terms of energy cost and pollution reduction potential, compared to a baseline plant configuration. The performance of each power plant is analyzed assuming an optimized control strategy, which is determined through a graph-based methodology that was previously developed and validated by the authors. Outcomes from our study show that, if heat pumps are used instead of natural gas boilers, energy costs can be reduced up to 41%, while CO 2 emissions can be reduced up to 73%, depending on the climatic conditions.Our results provide a sound basis for considering the larger penetration of photovoltaic plants as an effective solution towards cleaner and more efficient heating technologies for civil applications. The simultaneous utilization of heat pumps (as substitutes of boilers) and photovoltaic panels yields a positive synergy that nullifies the local pollution, drastically cuts the CO 2 emission, and guarantees the economical sustainability of the investment in renewable energy sources without subsidiary mechanisms.

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Optimum energy storage techniques for the improvement of renewable energy sources-based electricity generation economic efficiency

Cited by 209 publications

References 17 publications

New concept for energy storage: Microwave-induced carbon gasification with CO2

New concept for energy storage: Microwave-induced carbon gasification with CO2

Stand-alone wind power system operating with a specific storage structure

Smart integration of photovoltaic production, heat pump and thermal energy storage in residential applications

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