Process; Room Model Temperature - Siemens RVD230 Basic Documentation

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12.9.3 Process

HP Heating program
T Room temperature
R
t Time
t Forward shift for early shutdown
1
t Forward shift for the start of heating up
2

12.9.4 Room model temperature

To ascertain the room temperature generated by the room model, a distinction must be
made between 2 cases:
• The RVD230 is not in the quick setback mode:
The room temperature generated by the room model is identical to the current room
temperature setpoint
• The RVD230 is in setback mode:
The room temperature generated by the room model is determined according to the
following formula:
Room model temperature T
T
Rw
T
Rw
T
Rw
Progression of the room temperature generated by the room model
e 2.71828 (Basic Documentation of natural logarithms)
k Building time constant
t
t Time in hours
t Quick setback
1
T Composite outside temperature
AM
Basic Documentation RVD230
12 Function block Space heating
t Quick setback
3
TRw Room temperature setpoint
Setpoint of normal room temperature
T
Rw
Setpoint of reduced room temperature
T
Rw
TRx Actual value of the room temperature
= (T - T
RM Rw AM
T
RM
t
1
t
3 k
) × e
+ T
× t
AM
T Room temperature
R
T Room model temperature
RM
Setpoint of normal room temperature
T
Rw
Setpoint of reduced room temperature
T
Rw
CE1P2383en
27.05.2004