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Open AccessFeature PaperArticle

Performance Evaluation of a Small-Scale Latent Heat Thermal Energy Storage Unit for Heating Applications Based on a Nanocomposite Organic PCM

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General Department, Energy and Environmental Research Laboratory, National and Kapodistrian University of Athens, 344 00 Psachna Campus, Evia, Greece
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Z&X Mechanical Installations Ltd., 12 Agapinoros Street, 8049 Paphos, Cyprus
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General Department, Laboratory of Chemistry and Materials Technology, National and Kapodistrian University of Athens, 344 00 Psachna Campus, Evia, Greece
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Department of Physics, University of Ioannina, 45110 Ioannina, Greece
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Materials Science and Engineering Department, University of Ioannina, 45110 Ioannina, Greece
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Polytechnic Institute of Setubal-IPS, 2910-761 Setúbal, Portugal
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CINEA-IPS, Centre for Energy and Environment Research—IPS, 2910-761 Setúbal, Portugal
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Author to whom correspondence should be addressed.
ChemEngineering 2019, 3(4), 88; https://doi.org/10.3390/chemengineering3040088
Received: 26 September 2019 / Revised: 23 October 2019 / Accepted: 28 October 2019 / Published: 1 November 2019
(This article belongs to the Special Issue Advanced Heat Exchangers for Waste Heat Recovery Applications)
A small-scale latent heat thermal energy storage (LHTES) unit for heating applications was studied experimentally using an organic phase change material (PCM). The unit comprised of a tank filled with the PCM, a staggered heat exchanger (HE) for transferring heat from and to the PCM, and a water pump to circulate water as a heat transfer fluid (HTF). The performance of the unit using the commercial organic paraffin A44 was studied in order to understand the thermal behavior of the system and the main parameters that influence heat transfer during the PCM melting and solidification processes. The latter will assist the design of a large-scale unit. The effect of flow rate was studied given that it significantly affects charging (melting) and discharging (solidification) processes. In addition, as organic PCMs have low thermal conductivity, the possible improvement of the PCM’s thermal behavior by means of nanoparticle addition was investigated. The obtained results were promising and showed that the use of graphite-based nanoplatelets improves the PCM thermal behavior. Charging was clearly faster and more efficient, while with the appropriate tuning of the HTF flow rate, an efficient discharging was accomplished. View Full-Text
Keywords: heat exchanger; PCM; thermal energy storage; experimental; nanoparticles heat exchanger; PCM; thermal energy storage; experimental; nanoparticles
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MDPI and ACS Style

Koukou, M.K.; Dogkas, G.; Vrachopoulos, M.G.; Konstantaras, J.; Pagkalos, C.; Lymperis, K.; Stathopoulos, V.; Evangelakis, G.; Prouskas, C.; Coelho, L.; Rebola, A. Performance Evaluation of a Small-Scale Latent Heat Thermal Energy Storage Unit for Heating Applications Based on a Nanocomposite Organic PCM. ChemEngineering 2019, 3, 88. https://doi.org/10.3390/chemengineering3040088

AMA Style

Koukou MK, Dogkas G, Vrachopoulos MG, Konstantaras J, Pagkalos C, Lymperis K, Stathopoulos V, Evangelakis G, Prouskas C, Coelho L, Rebola A. Performance Evaluation of a Small-Scale Latent Heat Thermal Energy Storage Unit for Heating Applications Based on a Nanocomposite Organic PCM. ChemEngineering. 2019; 3(4):88. https://doi.org/10.3390/chemengineering3040088

Chicago/Turabian Style

Koukou, Maria K.; Dogkas, George; Vrachopoulos, Michail G.; Konstantaras, John; Pagkalos, Christos; Lymperis, Kostas; Stathopoulos, Vassilis; Evangelakis, George; Prouskas, Costas; Coelho, Luis; Rebola, Amandio. 2019. "Performance Evaluation of a Small-Scale Latent Heat Thermal Energy Storage Unit for Heating Applications Based on a Nanocomposite Organic PCM" ChemEngineering 3, no. 4: 88. https://doi.org/10.3390/chemengineering3040088

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