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Sanyo DE User Manual Page 10

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ENVIRONMENTALLY FRIENDLY TECHNOLOGY SUPER ABSORPTION
Heating cycle
In the absorption heating cycle (Figure 10), the unit is essentially acting as a
boiler. Diluted solution is heated in the high temperature generator releasing
refrigerant vapor from the absorbent.
The refrigerant vapor flows to the absorber/evaporator and condenses on
the heat transfer tubes of the evaporator. The water through the evaporator
Graph 10. D¨uhring diagram
Condenser
Cooling Water outlet
High Temperature
Generator
Absorber
Cooling Water
A Valve
Chilled Water
Refrigerant Pump
Absorbent Pump
Cooling Water Inlet
Purge Unit
Heat Exchanger
Evaporator
Burner
Low Temperature Generator
Exhaust Gas
Chilled Water
Open
Close
Concentrated Solution
Intermediate Solution
Diluted Solution
Liquid Refrigerant
Refrigerant Vapor
C
Valve
heat transfer tubes removes the sensible heat of the condensed refrigerant
and transfers the heat to the hot water loop. The condensed refrigerant is
mixed with the intermediate solution creating diluted solution. The diluted
solution is pumped back to the high temperature generator where the cycle
is started again.
Figure 10. Heating cycle
Condenser
High Temperature
Generator
Absorber
A Valve
Hot Water
Refrigerant Pump
Absorbent Pump
Purge Unit
Evaporator
Burner
Low Temperature Generator
Exhaust Gas
Open
Close
Intermediate Solution
Diluted Solution
Liquid Refrigerant
Hot Water
Refrigerant Vapor
C
Valve
Heat Exchanger
100 760
700
500
400
300
200
160
100
80
80
40
30
20
10
8
5
90
80
70
60
Temperature of refrigerant (°C)
Pressure (Torr)
Temperature of absorbent (°C)
50
40
30
20
10
0
0
10 20 30 40
0%
40%
45%
50%
55%
60%
65%
68%
50
J
60 70 80 90 100 110 120 130 140 150 160 170
B
A'
A
I
H
C
D'
D
E
F'
G
F
Line of Constant Concentrations
Cooling cycle
Figure 9. Cooling cycle
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