Numerical investigation of performance trade-off characteristics of a packed bed dehumidifier using aqueous blends of lithium chloride and calcium chloride

This article presents the results of an experimental study on the performance of a structured packing dehumidifier and the regenerator system. The system is tested using different proportions of an aqueous desiccant mixture of calcium chloride and lithium chloride solutions with an overall concentration of 40 wt%. The instantaneous effectiveness and the time-average effectiveness of the dehumidification process as well as the regeneration process are defined for the hybrid cooling system. It is found that as the lithium chloride content in the solution increases, the effectiveness of the dehumidifier as well as the regenerator increases. Moreover, the regeneration of the lithium chloride solution is found to be more effective than that of calcium chloride solution. The dehumidifier effectiveness using the desiccant mixture of 20 wt% CaCl2 and 20 wt% LiCl is found to be close to that of 45 wt% solution of calcium chloride and improves by ɛ80 per cent over the 40 wt% solution of calcium chloride.

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Vapor-Liquid Equilibrium of MTBE-Methanol, MTBE-Methanol-Calcium Chloride and MTBE-Methanol-Lithium Chloride Mixtures

Chemical Engineering & Technology ◽

10.1002/1521-4125(20020709)25:7<729::aid-ceat729>3.0.co;2-b ◽

2002 ◽

Vol 25 (7) ◽

pp. 729 ◽

Cited By ~ 5

Author(s):

F.A. Abu Al-Rub ◽

N. Abdel-Jabbar ◽

N. Darwish ◽

H. Ghanem

Keyword(s):

Calcium Chloride ◽

Lithium Chloride ◽

Liquid Equilibrium ◽

Vapor Liquid Equilibrium ◽

Vapor Liquid

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Cytological studies of early stages of powdery mildew in barley and wheat. VI. Antagonistic effects of calcium and lithium on the infection of coleoptiles of barley by Erysiphe graminis hordei

Canadian Journal of Botany ◽

10.1139/b79-053 ◽

1979 ◽

Vol 57 (4) ◽

pp. 408-412 ◽

Cited By ~ 10

Author(s):

S. Takamatsu ◽

H. Ishizaki ◽

H. Kunoh

Keyword(s):

Powdery Mildew ◽

Binding Site ◽

Calcium Chloride ◽

Lithium Chloride ◽

Calcium Ions ◽

Infection Process ◽

Erysiphe Graminis ◽

Antagonistic Effects ◽

Early Stages ◽

Erysiphe Graminis Hordei

Earlier researchers have shown that the susceptibility of barley to infection by Erysiphe graminis hordei is enhanced by calcium ions but inhibited by lithium. Some effects of these ions on the infection process of E. graminis hordei in coleoptiles of barley were investigated in this study. Whereas 1 mM lithium chloride inhibited appressorial formation considerably and haustorial formation completely, these effects were totally offset by 10 mM calcium chloride. Moreover, whereas 5 and 10 mM lithium chloride inhibited both appressorial and haustorial formation completely, the former was offset considerably by 10 mM calcium chloride, but the latter was not.Sequential calcium chloride − lithium chloride or lithium chloride − calcium chloride treatments carried out at different times and for various durations showed that events occurring in coleoptiles 11 to 13 h after inoculation were most vulnerable to the treatments. These events correspond to infection stages involving the development of cytoplasmic aggregates, papillae, and haustoria. The data suggest that the two ions in question might compete for a common binding site in a reaction(s) associated with certain stages of appressorial and haustorial development.

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