Naslov
High temperature latent energy storage performance improvement

Autori
Marušić, Ante ; Lončar, Dražen

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
12th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES 2017)

Mjesto i datum
Dubrovnik, Hrvatska, 04.10.2017. - 08.10.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Recenziran

Ključne riječi
Heat storage ; PCM modelling ; Heat exchange optimization

Sažetak
The renewed interest in concentrated solar power plants has intensified the research in high temperature latent storages. The characteristic problem of low thermal conductivity of high temperature phase change materials (PCM) is being tackled by improving effective thermal conductivity, either by mixing it with different high conductivity materials or by improving the heat exchanger design. In the later case, accurate and cost-effective models are necessary for the simulation of different designs and relatively long transient runs. In this paper the mathematical model of heat transfer and phase change inside of the PCM and the heat exchanger is defined and tested. The focus of the paper is on the effective modeling of heat transfer inside the PCM and conjugate the heat transfer between the heat exchanger material and the PCM. The presented model will provide basis for heat storage and heat exchanger design optimization. Fined shell and tube heat exchanger was used to test the model for optimization purposes. It is shown that even simple two variable optimization of fin angle and length can shorten the charging time significantly.

Izvorni jezik
Engleski

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