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1.2.3 Double effect (two-stage) absorption chiller
The absorption chiller mentioned above is the single effect type.
The following is a simple explanation on the double effect absorption chiller.
(Condenser)
As shown in Fig. 5, the two generators are provided in two-stage in the chiller-heater. One is the
high pressure generator heated by the combustion device such as gas and oil and the other is
the low pressure generator heated by the refrigerant vapor which generates in the high pressure
generator. This is to make the heat used effectively and the fuel consumption can be saved 1/3 or
more compared with that of the single effect absorption chiller.
2.
Properties of Lithium Bromide Solution
2.1 General Properties
As supposed from the fact that lithium and bromide belong to alkali and halogen group, the general
chemical property of lithium bromide is similar to salt and it is a stable substance which is neither
deteriorating in the air nor causing decomposition or volatilization. Principal properties of anhydride
are shown Table 2.
Chemical Formula
Molecular weight
Composition
Appearance
Specific gravity
Boiling point
Lithium bromide generates hydrate containing water of crystallization other than anhydride and
aqueous solution.
The most distinctive feature of lithium bromide is its super moisture-absorbing characteristics whether
it is in the form of anhydride, water of crystallization, or aqueous solution
Table 2 Properties of Lithium Bromide
86.856
Li : 7.99 % Br : 92.01 %
Colorless crystalline granule
3.464 (at 25 ℃)
1265 ℃
64
LiBr
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