<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The paper presents the adiabatic installation of compressed gases energy storage. The authors present the results of analyzes for this type of installation due to the selection of thermal storage material. The simulations were carried out for basalt, granite and ceramics (alumina) as well as for porosity value from 0.375 to 0.39 of basalt-filled reservoirs in Thermal Energy Storage (TES) installation. Characteristics of outlet air temperature, air pressure drop amount of energy stored and external heat losses as a time functions during the charging phase are presented. The research indicated that due to the lowest density and average heat capacity of the materials studied, granite has the fastest and most intense physical exit loss from the storage tank which was approximately 1100 W. However, there was no significant effect on air pressure drop depending on the chosen accumulation materials. The effect of rock bed porosity on the pressure drop of flowing air was investigated. For a constant mass flow rate, pressure drop values ranging from 2200 Pa to 6200 Pa were obtained depending on the porosity value.</p>
</abstract>

The paper presents the adiabatic installation of compressed gases energy storage. The authors present the results of analyzes for this type of installation due to the selection of thermal storage material. The simulations were carried out for basalt, granite and ceramics (alumina) as well as for porosity value from 0.375 to 0.39 of basalt-filled reservoirs in Thermal Energy Storage (TES) installation. Characteristics of outlet air temperature, air pressure drop amount of energy stored and external heat losses as a time functions during the charging phase are presented. The research indicated that due to the lowest density and average heat capacity of the materials studied, granite has the fastest and most intense physical exit loss from the storage tank which was approximately 1100 W. However, there was no significant effect on air pressure drop depending on the chosen accumulation materials. The effect of rock bed porosity on the pressure drop of flowing air was investigated. For a constant mass flow rate, pressure drop values ranging from 2200 Pa to 6200 Pa were obtained depending on the porosity value.

Role of Thermal Energy Storage Technology in the Decarbonization of Energy Sector Process – Packed Rock Bed Parameters Analysis

Department of Power Engineering and Turbomachinery

Architecture, Civil Engineering, Environment

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

The paper presents the adiabatic installation of compressed gases energy storage. The authors present the results of analyzes for this type of installation due...

Item	Basalt	Granite	Ceramics – alumina	Unit
Density	2660	2400	3960	kg/m³
Heat capacity	870–922	810–840	766–962	J/kg · K
Thermal conductivity	2.1–2.3	1.9–2.1	24.5–32.8	W/m · K
Max. operating temperature	~700	650	1600	°C

Item	No. 1	No. 2	No. 3	No. 4	Unit
Particle diameter D_p	24.5	20	15.5	12	mm
Porosity ɛ	0.39	0.385	0.38	0.375	-

Item	Value	Unit
Inlet air temperature	80	°C
Inlet air mass flow	0.04	kg/s
Ambient temperature	20.1	°C
Ambient pressure	101325	Pa
Average external heat transfer coefficient	5	W/m²K

Role of Thermal Energy Storage Technology in the Decarbonization of Energy Sector Process – Packed Rock Bed Parameters Analysis

Published Online: Jan 28, 2023

Page range: 65 - 74

Received: Mar 15, 2022

Accepted: May 24, 2022

DOI: https://doi.org/10.2478/acee-2022-0031

Keywords
Packed bed, Thermal energy storage, ANSYS Fluent, CFD, Adiabatic CAES

© 2022 Jakub Ochmann et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

The obtained and assumed parameters of the investigated materials in TES installation

The studied values of particle diameters and porosity for analyzed samples of materials in TES installation

The boundary conditions for the rock deposit in TES installation

Role of Thermal Energy Storage Technology in the Decarbonization of Energy Sector Process – Packed Rock Bed Parameters Analysis

Published Online: Jan 28, 2023

Page range: 65 - 74

Received: Mar 15, 2022

Accepted: May 24, 2022

DOI: https://doi.org/10.2478/acee-2022-0031

KeywordsPacked bed, Thermal energy storage, ANSYS Fluent, CFD, Adiabatic CAES

© 2022 Jakub Ochmann et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

The obtained and assumed parameters of the investigated materials in TES installation

The studied values of particle diameters and porosity for analyzed samples of materials in TES installation

The boundary conditions for the rock deposit in TES installation

Keywords
Packed bed, Thermal energy storage, ANSYS Fluent, CFD, Adiabatic CAES