Development and characteristics analysis of salt-hydrate based composite sorbent for low-grade thermochemical energy storage

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F20%3APU138577" target="_blank" >RIV/00216305:26210/20:PU138577 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S0960148120307606?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0960148120307606?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.renene.2020.05.062" target="_blank" >10.1016/j.renene.2020.05.062</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Development and characteristics analysis of salt-hydrate based composite sorbent for low-grade thermochemical energy storage

Popis výsledku v původním jazyce

Salt-hydrate based thermochemical energy storage is currently a momentous technique utilized for longterm energy storage due to the reversible gas-solid reaction under low-temperature. Among available salt candidates, LiOH center dot H2O is a promising thermochemical material owing to its high heat storage density of 1400 kJ/kg and low charging temperature. The expanded graphite (EG) is selected as a host matrix owing to its excellent thermal conductivity and abundant microstructure, which can promote the heat and mass transfer. This work focuses on the thermochemical performances of the form-stable LiOH$H2O/ EG composite sorbents. Five samples were being synthesized with EG contents of 0, 5, 8, 12 and 15 wt%. These porous sorbents are characterized to understand the microstructure and thermophysical properties. Considering the comprehensive effect of thermal conductivity and storage density, as well as the adsorption kinetics, the 8 wt% EG-doped sample is the most favourable sorbent, which possesses the thermal conductivity of 6.92 W/(m K) and energy density of 1120 kJ/kg. The cyclability results also reveal the energy capacity of this composite maintains similar to 90% of the original after ten consecutive heat charging (dehydration) and discharging (hydration), suggesting good stability. Additionally, the active energy of 2.58 x 10(9) s(-1) and pre-exponential factor of 59.5 kJ/mol for the sorbent is derived. Finally, the thermal power of 123 Wand thermal efficiency of 83.6% are achieved for the storage unit in simulation. All these results further confirmed the feasibility of the developed composite sorbent in low-grade heat storage. (C) 2020 Elsevier Ltd. All rights reserved.

Název v anglickém jazyce

Development and characteristics analysis of salt-hydrate based composite sorbent for low-grade thermochemical energy storage

Popis výsledku anglicky

Salt-hydrate based thermochemical energy storage is currently a momentous technique utilized for longterm energy storage due to the reversible gas-solid reaction under low-temperature. Among available salt candidates, LiOH center dot H2O is a promising thermochemical material owing to its high heat storage density of 1400 kJ/kg and low charging temperature. The expanded graphite (EG) is selected as a host matrix owing to its excellent thermal conductivity and abundant microstructure, which can promote the heat and mass transfer. This work focuses on the thermochemical performances of the form-stable LiOH$H2O/ EG composite sorbents. Five samples were being synthesized with EG contents of 0, 5, 8, 12 and 15 wt%. These porous sorbents are characterized to understand the microstructure and thermophysical properties. Considering the comprehensive effect of thermal conductivity and storage density, as well as the adsorption kinetics, the 8 wt% EG-doped sample is the most favourable sorbent, which possesses the thermal conductivity of 6.92 W/(m K) and energy density of 1120 kJ/kg. The cyclability results also reveal the energy capacity of this composite maintains similar to 90% of the original after ten consecutive heat charging (dehydration) and discharging (hydration), suggesting good stability. Additionally, the active energy of 2.58 x 10(9) s(-1) and pre-exponential factor of 59.5 kJ/mol for the sorbent is derived. Finally, the thermal power of 123 Wand thermal efficiency of 83.6% are achieved for the storage unit in simulation. All these results further confirmed the feasibility of the developed composite sorbent in low-grade heat storage. (C) 2020 Elsevier Ltd. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20704 - Energy and fuels

Projekt

<a href="/cs/project/EF15_003%2F0000456" target="_blank" >EF15_003/0000456: Laboratoř integrace procesů pro trvalou udržitelnost</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

RENEWABLE ENERGY

ISSN

0960-1481

e-ISSN

—

Svazek periodika

neuveden

Číslo periodika v rámci svazku

157

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

21

Strana od-do

920-940

Kód UT WoS článku

000541747100075

EID výsledku v databázi Scopus

2-s2.0-85085349629