Environmental Engineering Reference
In-Depth Information
Table 21. Continued
Item
Basic Design
Measured value
Simulation
Operation of
evaporator when
excessive heat is
collected
The evaporator can be operated up to a boiling
temperature of 100
o
C.
Adjust the heat collecting area or the
heating water flow rate so that the load of
the evaporator does not exceed 110%.
Install a 3-way proportional control
valve between the heat accumulator
and the evaporator in order to control
the heating water temperature so that
the load of the evaporator does not
exceed 110%.
Max. capacity = 5 m
3
/hr
Max. capacity = 6.46 m
3
/hr
Max. capacity = 6.0 m
3
/hr
Evaporator water
production
* Heating water flow rate = 18.4 m
3
/hr
* Feedwater to evaporator = 10.5 - 17.5 m
3
/hr
* Seawater to evaporator = 39.4 m
3
/hr
* Heating water flow rate = 12 - 17 m
3
/hr
* Feedwater flow rate = 17 - 21 m
3
/hr
* Seawater flow rate = 36 -40 m
3
/hr
Evaporator operating
flow rates
* Heating water flow rate = 11.2 - 22.4
m
3
/hr
* Feedwater flow rate = 17.5 m
3
/hr
* Seawater flow rate = 20.2 -40.3
m
3
/hr
Operating temp. at 5 m
3
/day load:
H/W inlet temp. = 99
o
C
H/W outlet temp. = 87
o
C
1
st
effect temp. = 83
o
C
18
th
effect temp. = 43
o
C
SW temp.(design value) = 35
o
C
Operating temp. at 5 m
3
/day :
Jan. Jul.
71
oi
C 79
o
C
58
o
C 66
o
C
58
o
C 66
o
C
.28
o
C 39
o
C
21.8
o
C 32.4
o
C
51,200 53,500
Operating temp. at 5 m
3
/day load
78.5
o
C
67.5
o
C
67.5
o
C
40.8
o
C
35
o
C
Evaporator operating
temperatures
SW concentration = 55,000 ppm
52,000
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