scholarly journals Thermo-Mechanical Investigations of Packed Beds for High Temperature Heat Storage: Continuum Modeling

2019 ◽  
Vol 9 (12) ◽  
pp. 2569
Author(s):  
Philipp Knödler
Keyword(s):  
Large Scale ◽  
Heat Storage ◽  
Storage System ◽  
Packed Bed ◽  
Packed Beds ◽  
Efficient Simulation ◽  
Temperature Heat ◽  
Central Elements ◽  
First Results ◽  
Technical Risks

Thermal energy storage (TES) systems are central elements for various types of new power plant concepts, whereat packed beds represent a promising storage inventory option. Due to thermal expansion and shrinking of the packed bed’s particles during cyclic thermal charging and discharging operation, high technical risks arise, and possibly lead to material failure. In order to accurately design the heat storage system, suitable tools for calculating induced forces and stresses are mandatory. Continuum models offer time efficient simulation results, but are in need of effective packed bed parameters. This paper introduces a methodology for applying a simplified continuum model and presents first results for an exemplarily large-scale application.

scholarly journals Thermo-Mechanical Investigations of Packed Beds for High Temperature Heat Storage: Uniaxial Compression Test Experiments and Particle Discrete Simulations

2019 ◽  
Vol 9 (8) ◽  
pp. 1600 ◽  
Author(s):  
Knödler
Keyword(s):  
Energy Storage ◽  
Particle Model ◽  
Uniaxial Compression Test ◽  
Packed Beds ◽  
Discrete Particle ◽  
Efficient Simulation ◽  
Temperature Heat ◽  
Discrete Particle Model ◽  
Technical Risks ◽  
Experimental Effort

Thermal energy storage (TES) systems are central elements for various types of new power plant concepts and industrial processes. Depending on the specific application, energy storage systems based on sensible heat transfer with packed beds as storage inventory are a promising storage technology. Due to thermal expansion and shrinking of the packed bed’s particles during cyclic thermal charging and discharging, high technical risks arise and possibly lead to material failure. In order to accurately design the TES, suitable tools for calculating thermo-mechanical induced forces and stresses are mandatory. For this purpose, different model approaches and tools are available. Continuum models offer time-efficient simulation results but need proper parametrization, which usually requires extensive experimental effort. This paper focuses on laying the groundwork on how to facilitate the effort for the parametrization of a continuum model by deploying a discrete particle model in order to simulate soil mechanical experiments. In this context, a specifically designed test rig is introduced, which is applied for the validation of the discrete particle model.

Dynamic Performance Analysis of Large-Scale Packed Bed Truncated Conical Thermal Energy Storage

2019 ◽  
Author(s):  
Shobhana Singh ◽  
Kim Sørensen
Keyword(s):  
Energy Storage ◽  
Large Scale ◽  
Storage System ◽  
Transient Behavior ◽  
Packed Bed ◽  
Energy Storage System ◽  
Heat Transfer Fluid ◽  
Design Parameters ◽  
Wide Range ◽  
Dynamic Performance Analysis

Abstract In the present paper, a high-temperature packed bed energy storage system of volume 175,000m3 is numerically investigated. The system is a underground packed bed of truncated conical shape, which comprises of rocks as a storage medium and air as a heat transfer fluid. A one-dimensional, two-phase model is developed to simulate the transient behavior of the storage. The developed model is used to conduct a parametric study with a wide range of design parameters to investigate the change in performance during both charging and discharging operation. Results show that the model satisfactorily predicts the dynamic behavior, and the truncated conical shaped storage with a rock diameter of 3cm, insulation thickness up to 0.6m and charging-discharging rate of 553kg/s leads to lower thermal losses and higher energy efficiencies. The paper provides useful insight into the transient performance and efficiency of a large-scale packed bed energy storage system within the range of parameters investigated.

Thermal performance of packed bed heat storage system for solar air heaters

2015 ◽  
Vol 29 ◽  
pp. 112-117 ◽  
Author(s):  
Panna Lal Singh ◽  
S.D. Deshpandey ◽  
P.C. Jena
Keyword(s):  
Thermal Performance ◽  
Heat Storage ◽  
Storage System ◽  
Packed Bed

Thermo-mechanical analysis of packed beds for large-scale storage of high temperature heat

2010 ◽  
Vol 46 (10) ◽  
pp. 1199-1207 ◽  
Author(s):  
Volker Dreißigacker ◽  
Hans Müller-Steinhagen ◽  
Stefan Zunft
Keyword(s):  
High Temperature ◽  
Large Scale ◽  
Mechanical Analysis ◽  
Packed Beds ◽  
Temperature Heat
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