energy storage model Articles
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Designing a sustainable hydrogen energy economy
A general vision of a sustainable energy economy relying substantially on hydrogen produced from renewables is sketched as a potential solution to the twin global crises of climate change and depleting oil reserves. Core differences between this 'sustainable hydrogen economy' (SHE) and the original hydrogen economy (HE) proposed in the early 1970s are discussed. In transport, rather than posing a ...
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Research team in PCM storage breakthrough
Storage tanks at Valle 1 and 2, in Cadiz, Spain. Image courtesy of Sener. Researchers in Catalunya have modelled a radical new PCM storage design that could deliver a 74 % thermal capacity efficiency with 32 % less salt than a traditional system. By Jason Deign A Spanish team has uncovered a radical new encapsulated phase-change material (PCM) storage system after creating a novel ...
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Control and small-signal analysis of battery and supercapacitor hybrid energy storage systems
This paper is devoted to control strategies for an active battery and supercapacitor hybrid energy storage system using the master-slave control scheme, where the charging and discharging currents of the supercapacitor are dependent on that of battery and the current sharing ratio depends upon the load conditions. A small-signal model is proposed, which considers the variations in the currents of ...
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A dynamic virtual power station model comprising small-scale energy zones
Concerns over global warming and high oil prices are expected to lead to a continuous increase in electricity generated by distributed renewable energy sources and small-scale embedded generators (SSEGs). This increase in SSEG will pose numerous technical challenges for distribution network operators. The small-scale energy zone (SSEZ) concept seeks to overcome these challenges using appropriate ...
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Regional electricity price differences due to intermittent wind power in Germany: impact of extended transmission and storage capacities
A fast growth of installed wind power capacity has been experienced in several European countries. In Germany, notably high wind power capacities are planned in the North. If the existing transmission capacities between individual regions become insufficient, the electricity prices will differ considerably and the system operation can become unstable. It is supposed that the extension of ...
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Exergy analysis of a rock bed thermal storage system
In this paper, a thermodynamic procedure is presented to analyse energy and exergy balances of a rock bed thermal storage system. The thermal behaviour is described by means of a control volume that includes three subsystems: the solar collectors, the fluid distribution system and the storage chamber. Solar-to-thermal energy conversion was obtained by means of a solar collector at a fixed airflow ...
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