integration of solid oxide fuel cells and ... - Ea Energianalyse

4. SYSTEM DESCRIPTION
4.5 Absorption Double Stage, Dual Heat
20
WGHEX
1
43
72
COND2
71
33 34
22
34
WGHEX
2
21
42
70
79
80
81
DES2
SHEX
2
41
77
76
78
52
35
COND1
36
VA2
31
VB2
73
82
75
MIXR
32
α
1
51
MIXL
1
50
59
82
60
61
DES1
SHEX
1
57
56
58
57
PUMP
2
1-α
SPL
1
VA1
VB1
PUMP
1
53
49
EVAP
48
54
62
36
ABSO
37
55
Chilled Water
Figure 4.5: Diagram of double stage absorption subsystem with dual heat (zoom of full diagram
in appendix G page 293). The cycle is similar to the double stage cycle - the difference is that
heat is transferred from the exhaust gas to the absorption cycle at two points (via WGHEX1 and
WGHEX2).
Another attempt to increase the production of cooling is to make a
configuration which is a combination of the single and the double stage
cycle, see figure 4.5. Basically it is a double stage cycle where heat is
transferred from the exhaust gas to the absorption cycle twice (dual heat).
In the configuration without Air Preheat, the exhaust gas from
WGHEX1 in point 21 is 165 ◦ C so only some of the heat from the exhaust
gas is used for the cooling cycle. So in order to use more of the heat from
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