In some types of reactors the end caps are water cooled and remain essentially at constant temperature. For these types of reactors the optional SPECIFY THE CAP TEMPERATURES keyword block can be used to fix the temperatures of the end caps during a LPCVD Thermal Analyzer simulation. In other types of reactors, the end caps may be heated to prevent condensation of reactants or by-products. For these latter types of reactors, the optional SPECIFY THE CAP POWERS keyword block can be used to
provide the heating power for those parts of the reactor. If cap temperature
keywords are not specified then the unspecified cap temperature is determined
from an energy balance as part of the LPCVD Thermal Analyzer
solution.
Table 3.6: SPECIFY THE END CAP CONDITIONS Keyword Phrases
|
Keyword Phrase |
Description |
|---|---|
|
SPECIFY THE CAP TEMPERATURES |
Title of an optional keyword block used to specify the temperatures of the reactor end caps. Used as an alternative to specifying cap powers with the SPECIFY THE CAP POWERS keyword block. If this keyword block is used, none of the keywords in the block have defaults; all are required inputs. Requires END statement to close keyword block. |
|
TEMPERATURE OF ENTRANCE CAP = |
Provides the temperature at the entrance cap of the reactor. Part of the SPECIFY THE CAP TEMPERATURES keyword block. |
|
Example: |
TEMPERATURE OF ENTRANCE CAP = 296.0 |
|
Units: |
K |
|
TEMPERATURE OF EXIT CAP = |
Provides the temperature at the exit cap of the reactor. Part of the SPECIFY THE CAP TEMPERATURES keyword block. |
|
Example: |
TEMPERATURE OF EXIT CAP = 296.0 |
|
Units: |
K |
|
SPECIFY THE CAP POWERS |
Title of an optional keyword block used to specify the heating power applied to the reactor end caps. Used as an alternative to specifying cap temperatures using the SPECIFY THE CAP TEMPERATURES keyword block. If this keyword block is used, none of the keywords in the block have defaults; all are required inputs. Requires END statement to close keyword block. |
|
POWER TO ENTRANCE CAP = |
Provides the heating power applied to the entrance cap of the reactor. Part of the SPECIFY THE CAP POWERS keyword block. |
|
Example: |
POWER TO ENTRANCE CAP = 20.0 |
|
Units: |
W |
|
POWER TO EXIT CAP = |
Provides the heating power applied to the exit cap of the reactor. Part of the SPECIFY THE CAP POWERS keyword block. |
|
Example: |
POWER TO EXIT CAP = 20.0 |
|
Units: |
W |