Next Article in Journal
Quantification of Furosine (Nε-(2-Furoylmethyl)-l-lysine) in Different Parts of Velvet Antler with Various Processing Methods and Factors Affecting Its Formation
Next Article in Special Issue
Investigation of Lactones as Innovative Bio-Sourced Phase Change Materials for Latent Heat Storage
Previous Article in Journal
Synthesis and Near Infrared Luminescence Properties of a Series of Lanthanide Complexes with POSS Modified Ligands
Previous Article in Special Issue
Own-Synthetize Nanoparticles to Develop Nano-Enhanced Phase Change Materials (NEPCM) to Improve the Energy Efficiency in Buildings
Open AccessArticle

Effects of Pressure-Induced Density Changes in the Thermal Energy Absorbed by a Micro-Encapsulated Phase-Change Material

Departamento de Ciencias, Escuela de Ingeniería y Ciencias, Tecnológico de Monterrey Campus Estado de México, Atizapán de Zaragoza, Estado de México 52900, México
*
Author to whom correspondence should be addressed.
Molecules 2019, 24(7), 1254; https://doi.org/10.3390/molecules24071254
Received: 22 February 2019 / Revised: 21 March 2019 / Accepted: 22 March 2019 / Published: 30 March 2019
(This article belongs to the Special Issue Phase Change Materials)
Density changes produced by pressure increments during melting of a spherically confined phase-change material have an impact on the thermal energy absorbed by the heat storage unit. Several authors have assumed incompressible phases to estimate the volume change of the phase-change material and the thermal balance at the liquid–solid interface. This assumption simplifies the problem but neglects the contribution of density changes to the thermal energy absorbed. In this work, a thermal balance at the interface that depends on the rate of change of the densities and on the shape of the container is found by imposing total mass conservation. The rigidity of the container is tuned through the coupling constant of an array of springs surrounding the phase-change material. This way, the behavior of the system can be probed from the isobaric to the isochoric regimes. The sensible and latent heat absorbed during the melting process are obtained by solving the proposed model through numerical and semi-analytical methods. Comparing the predictions obtained through our model, it is found that even for moderate pressures, the absorbed thermal energy predicted by other authors can be significantly overestimated. View Full-Text
Keywords: phase-change material; micro-encapsulated; thermal energy absorbed; sensible heat; latent heat phase-change material; micro-encapsulated; thermal energy absorbed; sensible heat; latent heat
Show Figures

Figure 1

MDPI and ACS Style

Hernández-Cooper, E.M.; Otero, J.A. Effects of Pressure-Induced Density Changes in the Thermal Energy Absorbed by a Micro-Encapsulated Phase-Change Material. Molecules 2019, 24, 1254.

AMA Style

Hernández-Cooper EM, Otero JA. Effects of Pressure-Induced Density Changes in the Thermal Energy Absorbed by a Micro-Encapsulated Phase-Change Material. Molecules. 2019; 24(7):1254.

Chicago/Turabian Style

Hernández-Cooper, Ernesto M.; Otero, José A. 2019. "Effects of Pressure-Induced Density Changes in the Thermal Energy Absorbed by a Micro-Encapsulated Phase-Change Material" Molecules 24, no. 7: 1254.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop