Carrier 16JT Series Start Up & Operation Manual page 8

Point 10 represents the strong solution leaving the low-stage
generator and entering the low-temperature heat exchanger.
It is at a weaker concentration than the solution from the
high-stage generator, and can be plotted approximately by
measuring the temperatures of the leaving strong solution
and vapor condensate (saturation temperature). This condi-
tion cannot be measured accurately.
Point 11 represents the mixture of strong solution from the
high-temperature heat exchanger and strong solution from
the low-stage generator as they both enter the low-temperature
heat exchanger. The temperature can be measured on those
models which have separate solution heat exchangers.
SOLUTION TEMPERATURE
POINT
F
1 110
2 95
3 149
4 160
5 167
6 277
7 289
8 318
9 167
10 180
11 176
12 117
13 111
LCD — Level Control Device
TC — Temperature Control (Capacity Control)
Table 2 — Typical Full Load Cycle Equilibrium Data
VAPOR PRESSURE
C in. Hg mm Hg
43 0.24
35 0.24
65 1.10
71 1.50
75 2.00
136 19.00
143 24.00
159 24.00
75 1 10
82 2.00
80 1.60
47 0.31
44 0.28
Fig. 7 — Equilibrium Diagram and Chiller Solution Cycle
Point 12 represents the combined strong solution before it
leaves the low-temperature heat exchanger after giving up
heat to the weak solution. This condition is internal and can-
not be measured.
Point 13 represents the strong solution leaving the low-
temperature heat exchanger and entering the absorber spray
nozzles, after being mixed with some weak solution in the
heat exchanger. The temperature can be measured, but the
concentration cannot be sampled. After leaving the spray
nozzles, the solution is somewhat cooled and concentrated
as it flashes to the lower pressure of the absorber, at
Point 1.
SOLUTION PERCENTAGE
(Lithium Bromide)
6 62.2
6 58.0
29 58.0
39 58.0
50 58.0
490 58.0
600 58.0
600 63.6
28 63.6
49 61.3
40 62.2
8 62.2
7 61.5
8
SATURATED TEMPERATURE
F C
40 4
40 4
83 28
93 34
100 38
191 88
200 93
200 93
82 28
100 38
93 34
46 8
43 6