Research output: Contribution to journal › Article › peer-review
“LiCl/vermiculite - Methanol” as working pair for adsorption heat storage : Adsorption equilibrium and dynamics. / Grekova, Alexandra; Strelova, Svetlana; Gordeeva, Larisa et al.
In: Energy, Vol. 186, 115775, 01.11.2019.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - “LiCl/vermiculite - Methanol” as working pair for adsorption heat storage
T2 - Adsorption equilibrium and dynamics
AU - Grekova, Alexandra
AU - Strelova, Svetlana
AU - Gordeeva, Larisa
AU - Aristov, Yuri
N1 - Publisher Copyright: © 2019 Elsevier Ltd
PY - 2019/11/1
Y1 - 2019/11/1
N2 - Adsorption heat storage (AHS) is an energy-saving technology that allows low-temperature heat from renewable energy sources and various wastes to be utilized. One of the most important ways to increase the efficiency of the AHS units is to develop adsorbents with high heat storage density. This work addresses the methanol sorption on an innovative composite based on expanded vermiculite impregnated with LiCl (LiCl/Verm), which is suggested for adsorptive cycles for seasonal heat storage. Such a cycle is typical of regions with moderately cold winter, like the South of the Russian Federation as well as the Northern part of China, Europe etc. The study consists of: (1) synthesis and characterization of the composite; (2) investigation of equilibrium and dynamics of methanol sorption under operating conditions of the seasonal AHS cycle; (3) evaluation of the sorbent heat storage capacity and specific power. The heat storage capacity of LiCl/Verm under conditions of the tested cycle reaches 1.5 kJ/g. This value far exceeds that for conventional and innovative adsorbents. The specific power of 0.9 and 1.5 kW/kg can be realized during discharging and charging stages of the cycle, respectively. These findings demonstrate a high potential of the LiCl/Verm composite as methanol sorbent for AHS.
AB - Adsorption heat storage (AHS) is an energy-saving technology that allows low-temperature heat from renewable energy sources and various wastes to be utilized. One of the most important ways to increase the efficiency of the AHS units is to develop adsorbents with high heat storage density. This work addresses the methanol sorption on an innovative composite based on expanded vermiculite impregnated with LiCl (LiCl/Verm), which is suggested for adsorptive cycles for seasonal heat storage. Such a cycle is typical of regions with moderately cold winter, like the South of the Russian Federation as well as the Northern part of China, Europe etc. The study consists of: (1) synthesis and characterization of the composite; (2) investigation of equilibrium and dynamics of methanol sorption under operating conditions of the seasonal AHS cycle; (3) evaluation of the sorbent heat storage capacity and specific power. The heat storage capacity of LiCl/Verm under conditions of the tested cycle reaches 1.5 kJ/g. This value far exceeds that for conventional and innovative adsorbents. The specific power of 0.9 and 1.5 kW/kg can be realized during discharging and charging stages of the cycle, respectively. These findings demonstrate a high potential of the LiCl/Verm composite as methanol sorbent for AHS.
KW - Adsorption heat storage
KW - Composite sorbent salt/matrix
KW - Expanded vermiculite
KW - Lithium chloride
KW - Methanol
KW - TRANSFORMATION
KW - SYSTEM
KW - PUMPS
KW - SORPTION
KW - COMPOSITES
KW - SALT
KW - WATER-ADSORPTION
KW - CYCLES
UR - http://www.scopus.com/inward/record.url?scp=85073651655&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2019.07.105
DO - 10.1016/j.energy.2019.07.105
M3 - Article
AN - SCOPUS:85073651655
VL - 186
JO - Energy
JF - Energy
SN - 0360-5442
M1 - 115775
ER -
ID: 21937943