Open AccessDynamic Performance of Various Thermal Energy Storage Materials
Author(s) -
Mohammed H. Alhamdo,
Maathe A. Theeb,
H. S. Alani
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/916/1/012001
Subject(s) - thermal energy storage , heat transfer , work (physics) , thermal , reynolds number , pressure drop , matrix (chemical analysis) , materials science , mechanics , thermodynamics , physics , composite material , turbulence
The thermal effects of metal partitions inside Porous Thermal Energy Storage (PTES) have been investigated experimentally and theoretically. Four circular cross-sectional area matrices have been studied and comparison was made between them. These include; storage with Flat Plate partitions (FP), storage with Corrugated Plate partitions (CP), storage with Wire Mesh partitions (WM), and storage Without Partitions (WP). A numerical model has been developed to simulate dynamic thermal energy transfer within (PTES) to include the important thermal effects of the partitions within porous matrices. The developed numerical model is characterized by system of differential energy conservation equations, these equations are solved numerically by time marching implicit method. The theoretical analysis and computational scheme validity has been verified through comparisons with measured data from the experimental work conducted in this work. The investigation has been done for Reynolds number, Re, of 1270 <Re < 8050. A convenient agreement was found between theoretical and experimental results for all of the tested matrices. The metal partitions were specified to have considerable effect on the thermal response for each type of the tested materials. From the comparison of different matrices concerning their ratio between pressure drop and heat transfer, it was found that the (CP) matrix has the highest performance. In this work, an improved transient method was presented for the calculation of the average heat transfer coefficient for porous flow channels along the axial direction with the thermal effects of the metal partitions. A correlation equation been developed for the J-factor have for each matrix material at the range of Reynold’s number under investigation. The new (three) correlations predicting the J-factor are found to be in reasonable agreement with the limited published data. However, these correlations have been included the effect of the inside partitions, which have been ignored in all previous published data.