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4.4 Absorption Double Stage
4.4. Absorption Double Stage
The double stage absorption cycle is similar to the single stage cycle
described in previous section. Thus only the additional components and
changes of parameters will be described in this section. All state points
refers to figure 4.4.
20
WGHEX
1
43
COND2
71
33 34
21
70
79
42
DES2
41
78
72
80
81
SHEX
2
77
76
52
35
COND1
36
51
PUMP
VA2
VB2
2
82
73 75
1-α
32 31
MIXR
α
SPL
1
50
1
58
MIXL
1
59
82
60
61
DES1
SHEX
1
57
56
57
VA1
VB1
PUMP
1
53
49
EVAP
48
54
62
36
ABSO
37
55
Chilled Water
Figure 4.4: Diagram of double stage absorption subsystem (zoom of full diagram in appendix G
page 293). It is similar to the single stage cycle with addition of an extra condenser (COND2),
desorber (DES2), two mixers (MIXR and MIXL), a pump, a splitter (SPL) and two valves (VA2
and VB2).
The exhaust gas is sent through WGHEX1 (point 20 and point 21).
As for the single stage cycle, WGHEX1 and DES2 are modeled as two
components (but considered as one) which means that ∆T min,DES2,r,o = 0.
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