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Energies 2017, 10(10), 1497; doi:10.3390/en10101497

Application of a Simplified Thermal-Electric Model of a Sodium-Nickel Chloride Battery Energy Storage System to a Real Case Residential Prosumer

1
Department of Industrial Engineering, University of Padova, 35131 Padova, Italy
2
FZSONICK SA, Via Laveggio 15, 6855 Stabio, Switzerland
*
Author to whom correspondence should be addressed.
Received: 1 August 2017 / Revised: 15 September 2017 / Accepted: 21 September 2017 / Published: 26 September 2017
(This article belongs to the Special Issue Battery Energy Storage Applications in Smart Grid)
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Abstract

Recently, power system customers have changed the way they interact with public networks, playing a more and more active role. End-users first installed local small-size generating units, and now they are being equipped with storage devices to increase the selfconsumption rate. By suitably managing local resources, the provision of ancillary services and aggregations among several end-users are expected evolutions in the near future. In the upcoming market of household-sized storage devices, sodium-nickel chloride technology seems to be an interesting alternative to lead-acid and lithium-ion batteries. To accurately investigate the operation of the NaNiCl2 battery system at the residential level, a suitable thermoelectric model has been developed by the authors, starting from the results of laboratory tests. The behavior of the battery internal temperature has been characterized. Then, the designed model has been used to evaluate the economic profitability in installing a storage system in the case that end-users are already equipped with a photovoltaic unit. To obtain realistic results, real field measurements of customer consumption and solar radiation have been considered. A concrete interest in adopting the sodiumnickel chloride technology at the residential level is confirmed, taking into account the achievable benefits in terms of economic income, back-up supply, and increased indifference to the evolution of the electricity market. View Full-Text
Keywords: NaNiCl2 batteries; photovoltaic generation; residential end-users; self-consumption; sodium-nickel chloride technology; techno-economic analysis NaNiCl2 batteries; photovoltaic generation; residential end-users; self-consumption; sodium-nickel chloride technology; techno-economic analysis
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Bignucolo, F.; Coppo, M.; Crugnola, G.; Savio, A. Application of a Simplified Thermal-Electric Model of a Sodium-Nickel Chloride Battery Energy Storage System to a Real Case Residential Prosumer. Energies 2017, 10, 1497.

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