C4-6
IM 34M06H62-02E 2nd Edition : June 2008-00
Example specifying SP Up Gradient (SPR.UP)
This example illustrates the use of the SP Up Gradient (SPR.UP) parameter
(see Figure C4.3).
The system is operating with 1.SP and then switched to 2.SP. The CSP rises at a fixed
rate. In the following example, the temperature difference between 2.SP and 1.SP is
140ºC, and it is desired to achieve this temperature change in 2 minutes. Hence,
SPR.UP is set to 70 (ºC/minute).
70°C/minute
SPR.UP=140/2=70(°C/minute)
Duration for
temperature rise
= 2 minutes
2.SP1.SP
SPNO is
changed
2.SP=640°C
1.SP=500°C
Temperature
difference = 140°C
SPR.TM = 1 (minute)
Figure C4.3 Example Specifying SP Up Gradient
*: The time unit can be hour or minute, and is specified using the SP Gradient Time Unit (SPR.TM) parameter.
Temp. diff. (C) 140C
Time (minute)* 2 minutes
SPR.UP =
= 70 (C/minute)
=
To Next Page
Loading...