JFD KI40018AA, Руководство по эксплуатации и обслуживанию

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20
Chapter 3
KI-OM-6768 R0
Table 3.1 Heater Selection Table for Required Temperature Rise
Example: Temperature rise calculation
The Temperature Controller set-point (SV) should be set to the calculated Total Outlet Temperature
(T
out)
52°C.
T
rise
= T
out
- T
in
= 52 – 5 = 47ºC (125 – 40 = 85ºF)
As indicated in the selection Table 3.1, for a 43 – 47ºC (77-85ºF) temperature rise heater
banks 2, 3, 4 and 5 should be switched on.
Temp Rise
ºC (ºF)
Heater On (•)
Heater 1 Heater 2 Heater 3 Heater 4 Heater 5
0-4 (0-7) •
4-8 (7-14) •
8-11 (14-20) •
11-14 (20-25) • •
14-18 (25-32) • •
18-22 (32-40) • • •
22-25 (40-45) • •
25-29 (45-52) • • •
29-32 (52-58) • • •
32-36 (52-65) • • • •
36-40 (65-72) • • •
40-43 (72-77) • • • •
43-47 (77-85) • • • •
47-50 (85-90) • • • • •
Umbilical Hose Length 180 m
Desired Temperature at Bottom (T
b
) 35ºC (95ºF)
Inlet Water Temperature (T
in
) 5ºC (40ºF)
From graph 1: T
loss
for 180 m = 17ºC (30ºF)
T
out
= T
b
+ T
loss
= 35 + 17 = 52ºC (95 + 30 = 125ºF)