An Appraisal of One-Dimensional Analytical Models for the Packed Bed Thermal Storage Systems Utilizing Sensible Heat Storage Materials

1996 ◽  
Vol 118 (1) ◽  
pp. 44-49 ◽  
Author(s):  
G. A. Adebiyi ◽  
D. J. Chenevert
Keyword(s):  
Energy Storage ◽  
Single Phase ◽  
Heat Storage ◽  
Storage Systems ◽  
Packed Bed ◽  
Axial Dispersion ◽  
Analytical Models ◽  
Sensible Heat ◽  
One Dimensional ◽  
Heat Storage Materials

This article gives an appraisal of existing analytical one-dimensional models for the packed bed thermal energy storage (TES) systems utilizing sensible heat storage (SHS) materials. The models include that of Schumann, which is for separate phases, but does not include axial conductivity (or dispersion) in the bed, and the single-phase model of Riaz which includes axial dispersion. An alternative axial conductivity model is proposed which compares well with the Schumann model when axial dispersion is negligible, but otherwise caters adequately for axial dispersion at the low Peclet number condition.

scholarly journals Extended modeling of packed-bed sensible heat storage systems

2018 ◽  
Author(s):  
Thibaut Esence ◽  
Arnaud Bruch ◽  
Jean-François Fourmigué ◽  
Benoit Stutz
Keyword(s):  
Heat Storage ◽  
Storage Systems ◽  
Packed Bed ◽  
Sensible Heat

scholarly journals Physical models for packed bed: Sensible heat storage systems

2019 ◽  
Vol 23 ◽  
pp. 69-78 ◽  
Author(s):  
A. Elouali ◽  
T. Kousksou ◽  
T. El Rhafiki ◽  
S. Hamdaoui ◽  
M. Mahdaoui ◽  
...  
Keyword(s):  
Heat Storage ◽  
Storage Systems ◽  
Packed Bed ◽  
Physical Models ◽  
Sensible Heat

scholarly journals A versatile one-dimensional numerical model for packed-bed heat storage systems

2019 ◽  
Vol 133 ◽  
pp. 190-204 ◽  
Author(s):  
Thibaut Esence ◽  
Arnaud Bruch ◽  
Jean-François Fourmigué ◽  
Benoit Stutz
Keyword(s):  
Numerical Model ◽  
Heat Storage ◽  
Storage Systems ◽  
Packed Bed ◽  
One Dimensional

Parametric Study on the Operating Efficiencies of a Packed Bed for High-Temperature Sensible Heat Storage

1998 ◽  
Vol 120 (1) ◽  
pp. 2-13 ◽  
Author(s):  
G. A. Adebiyi ◽  
E. C. Nsofor ◽  
W. G. Steele ◽  
A. A. Jalalzadeh-Azar
Keyword(s):  
High Temperature ◽  
Energy Storage ◽  
Heat Storage ◽  
Storage System ◽  
Packed Bed ◽  
Second Law ◽  
Operating Parameters ◽  
Sensible Heat ◽  
Storage Media ◽  
Transient Conduction

A comprehensive computer model of a packed bed thermal energy storage system originally developed for storage media employing either sensible heat storage (SHS) materials or phase-change material (PCM), was validated for the sensible heat storage media using a rather extensive set of data obtained with a custom-made experimental facility for high-temperature energy storage. The model is for high-temperature storage and incorporates several features including (a) allowance for media property variations with temperature, (b) provisions for arbitrary initial conditions and time-dependent varying fluid inlet temperature to be set, (c) formulation for axial thermal dispersion effects in the bed, (d) modeling for intraparticle transient conduction in the storage medium, (e) provision for energy storage (or accumulation) in the fluid medium, (f) modeling for the transient conduction in the containment vessel wall, (g) energy recovery in two modes, one with flow direction parallel with that in the storage mode (cocurrent) and the other with flow in the opposite direction (countercurrent), and (h) computation of the first and second-law efficiencies. Parametric studies on the sensible heat storage system were carried out using the validated model to determine the effects of several of the design and operating parameters on the first and second-law efficiencies of the packed bed. Decisions on the thermodynamic optimum system design and operating parameters for the packed bed are based on the second-law evaluations made

A Second-Law Study on Packed Bed Energy Storage Systems Utilizing Phase-Change Materials

1991 ◽  
Vol 113 (3) ◽  
pp. 146-156 ◽  
Author(s):  
George A. Adebiyi
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Heat Storage ◽  
Storage Systems ◽  
Packed Bed ◽  
Second Law ◽  
Sensible Heat ◽  
Storage Material ◽  
Heat Storage Material ◽  
Removal Processes

Thermal modeling of packed bed, thermal energy storage systems has traditionally been limited to first-law considerations. The exceptions include a few second-law studies, noted in the Introduction, of sensible heat storage systems and the latent heat storage systems. The cited second-law studies treat the storage and removal processes essentially as “batch” heating and cooling. The approximation effectively ignores the significant temperature gradient, especially in the axial direction, in the storage medium over a substantial portion of both the storage and removal processes. The results presented in this paper are for a more comprehensive model of the packed bed storage system utilizing encapsulated phase-change materials. The fundamental equations for the system are similar to those of Schumann, except that a transient conduction equation is included for intraparticle conduction in each pellet. The equations are solved numerically, and the media temperatures obtained are used for the determination of the exergy (or availability) disposition in complete storage-removal cycles. One major conclusion of the study from both the first-law and second-law perspectives is that the principal advantage in the use of phase-change storage material is the enhanced storage capacity, compared with the same size of packed bed utilizing a sensible heat storage material. Thermodynamically, however, it does not appear that the system employing phase-change storage material will always, or necessarily, be superior to that using a sensible heat-storage material. The latter conclusion is reached only on the basis of the second-law evaluation.

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