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Energies 2016, 9(6), 394; doi:10.3390/en9060394

Numerical Study of Solidification in a Plate Heat Exchange Device with a Zigzag Configuration Containing Multiple Phase-Change-Materials

1
State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
2
School of Engineering and Technology, China University of Geosciences, Beijing 100083, China
3
Birmingham Centre for Thermal Energy Storage, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Chi-Ming Lai
Received: 31 January 2016 / Revised: 28 April 2016 / Accepted: 3 May 2016 / Published: 24 May 2016
(This article belongs to the Special Issue Energy Efficient Actuators and Systems)
View Full-Text   |   Download PDF [5852 KB, uploaded 24 May 2016]   |  

Abstract

Latent heat thermal energy storage (TES) plays an important role in the advocation of TES in contrast to sensible energy storage because of the large storage energy densities per unit mass/volume possible at a nearly constant thermal energy. In the current study, a heat exchange device with a zigzag configuration containing multiple phase-change-materials (m-PCMs) was considered, and an experimental system was built to validate the model for a single PCM. A two-dimensional numerical model was developed using the ANSYS Fluent 14.0 software program. The energy fractions method was put forward to calculate the average Ste number and the influence of Re and Ste numbers on the discharge process were studied. The influence of phase change temperature among m-PCMs on the solidification process has also been studied. A new boundary condition was defined to determine the combined effect of the Re and Ste numbers on the discharging process. The modelling results show that for a given input power, the Ste (or Re) number has a significant impact on the discharging process; however, the period value of inlet velocity has almost no impact on it. Besides, the zigzag plate with m-PCMs has a good impact on the temperature shock as “filter action” in the discharging process. View Full-Text
Keywords: multiple phase-change-materials (m-PCMs); heat exchange; zigzag configuration; process intensification; numerical modelling; solidification multiple phase-change-materials (m-PCMs); heat exchange; zigzag configuration; process intensification; numerical modelling; solidification
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Wang, P.; Li, D.; Huang, Y.; Zheng, X.; Wang, Y.; Peng, Z.; Ding, Y. Numerical Study of Solidification in a Plate Heat Exchange Device with a Zigzag Configuration Containing Multiple Phase-Change-Materials. Energies 2016, 9, 394.

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