Performance analysis of a thermochemical based heat storage as an addition to cogeneration systems
Research output: Journal contributions › Journal articles › Research › peer-review
Standard
In: Energy Conversion and Management, Vol. 106, 01.12.2015, p. 1327-1344.
Research output: Journal contributions › Journal articles › Research › peer-review
Harvard
APA
Vancouver
Bibtex
}
RIS
TY - JOUR
T1 - Performance analysis of a thermochemical based heat storage as an addition to cogeneration systems
AU - Fopah Lele, Armand
AU - Kuznik, Frédéric
AU - Opel, Oliver
AU - Ruck, Wolfgang K L
PY - 2015/12/1
Y1 - 2015/12/1
N2 - A closed thermochemical heat storage system based on pure salt hydrate, namely SrBr2·6H2O is developed and its performance, numerically investigated. This paper focuses on system development as an addition to existing micro-combined heat and power (cogeneration). The originality of this work lies in the fact that it models the coupled heat and mass transfer with chemical reaction on a 3D geometry to be closed to reality. Besides, a reaction front model is also developed, in order to determine optimal parameters (bed porosity, bed thickness kinetic behaviour) and thermal power, required for system efficiency. Then, sensitivity of permeability and thermal conductivity on the reaction efficiency is numerically demonstrated, leading to some recommendations for future prototype development. Results exhibit a theoretical reactor energy storage density of 115 kWh m-3, storage capacity of 61 kWh, thermal efficiency of 78% (at 90% of reaction conversion) and COPth of 0.97, highlighting system performances. An average output temperature of 52°C is numerically obtained. A comparison simulation-experiment is then performed and discussed, showing encouraging results, even if limited at lab-scale. Performances are quite similar, consolidating the idea that, waste heat from cogeneration can be re-used with 78% of efficiency.
AB - A closed thermochemical heat storage system based on pure salt hydrate, namely SrBr2·6H2O is developed and its performance, numerically investigated. This paper focuses on system development as an addition to existing micro-combined heat and power (cogeneration). The originality of this work lies in the fact that it models the coupled heat and mass transfer with chemical reaction on a 3D geometry to be closed to reality. Besides, a reaction front model is also developed, in order to determine optimal parameters (bed porosity, bed thickness kinetic behaviour) and thermal power, required for system efficiency. Then, sensitivity of permeability and thermal conductivity on the reaction efficiency is numerically demonstrated, leading to some recommendations for future prototype development. Results exhibit a theoretical reactor energy storage density of 115 kWh m-3, storage capacity of 61 kWh, thermal efficiency of 78% (at 90% of reaction conversion) and COPth of 0.97, highlighting system performances. An average output temperature of 52°C is numerically obtained. A comparison simulation-experiment is then performed and discussed, showing encouraging results, even if limited at lab-scale. Performances are quite similar, consolidating the idea that, waste heat from cogeneration can be re-used with 78% of efficiency.
KW - 3D reactor model
KW - Heat storage
KW - Reaction front model
KW - Thermal performance
KW - Thermochemical process
KW - Energy research
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84946433903&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/57993449-d2ae-32c9-a3a9-a1a1bfeacd80/
U2 - 10.1016/j.enconman.2015.10.068
DO - 10.1016/j.enconman.2015.10.068
M3 - Journal articles
AN - SCOPUS:84946433903
VL - 106
SP - 1327
EP - 1344
JO - Energy Conversion and Management
JF - Energy Conversion and Management
SN - 0196-8904
ER -