Micro-scale Thermodynamic and Kinetic Analysis of a Calcium Chloride Methanol System for Process Cooling
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In: Energy Procedia, Vol. 105, 01.05.2017, p. 4363-4369.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Micro-scale Thermodynamic and Kinetic Analysis of a Calcium Chloride Methanol System for Process Cooling
AU - Korhammer, Kathrin
AU - Neumann, Karsten
AU - Opel, Oliver
AU - Ruck, Wolfgang K.L.
PY - 2017/5/1
Y1 - 2017/5/1
N2 - Calcium chloride methanol addition compounds are promising sorbent candidates, which can not only be used for thermal energy storage but also for providing evaporative cooling in industrial applications using low-grade heat. The methanolate dissociation occurs within the working temperature range of low temperature cooling systems. Methanol has a low freezing point and high operating pressure and is less toxic and corrosive than ammonia as refrigerant. In solid-gas reactions the overall specific cooling capacity mainly depends on the sorption rate of the reaction. In general the reaction pattern follows a complex mechanism, in which the formation of intermediate phases and structural changes might occur. In this study a comprehensive micro-scale analysis on the effect of the methanol partial pressure, the thermal history of the calcium chloride, the dissociation temperature and subsequent sorption-desorption cycling on the sorption rate has been carried out. Results show that thermodynamic conditions as well as the thermal history and physicochemical properties of the material have a great influence on the sorption rate, whereas only a marginal dependence between the regeneration temperature and the sorption process was observed.
AB - Calcium chloride methanol addition compounds are promising sorbent candidates, which can not only be used for thermal energy storage but also for providing evaporative cooling in industrial applications using low-grade heat. The methanolate dissociation occurs within the working temperature range of low temperature cooling systems. Methanol has a low freezing point and high operating pressure and is less toxic and corrosive than ammonia as refrigerant. In solid-gas reactions the overall specific cooling capacity mainly depends on the sorption rate of the reaction. In general the reaction pattern follows a complex mechanism, in which the formation of intermediate phases and structural changes might occur. In this study a comprehensive micro-scale analysis on the effect of the methanol partial pressure, the thermal history of the calcium chloride, the dissociation temperature and subsequent sorption-desorption cycling on the sorption rate has been carried out. Results show that thermodynamic conditions as well as the thermal history and physicochemical properties of the material have a great influence on the sorption rate, whereas only a marginal dependence between the regeneration temperature and the sorption process was observed.
KW - calcium chloride
KW - cycle stability
KW - kinetics
KW - methanol
KW - Refrigeration
KW - TGA/DSC
KW - Energy research
UR - http://www.scopus.com/inward/record.url?scp=85020749478&partnerID=8YFLogxK
U2 - 10.1016/j.egypro.2017.03.928
DO - 10.1016/j.egypro.2017.03.928
M3 - Journal articles
AN - SCOPUS:85020749478
VL - 105
SP - 4363
EP - 4369
JO - Energy Procedia
JF - Energy Procedia
SN - 1876-6102
ER -