Download Technical Notes

Cycle-Tempo Manual
Technical Notes
2.2
Calculation run of Cycle-Tempo
The process scheme may consist of a closed or an open system or of a combination of these
systems.
For preparing the input data for a process scheme all the pipes, apparatuses and cycles must
be numbered for the purposes of the identification.
The calculation procedure is broken down into twelve steps. The calculation run for Cycle Tempo is set out in Figure 2-4.
Step 1
Reading in
The order for reading in is:
a.
Parameters which determine the size of the system, such as number of apparatuses,
pipes, turbines etc.
b.
Apparatus data. Data may be specified which may differ for each apparatus. The
apparatus number and apparatus type are compulsory.
c.
Topology of the system. It is made clear to the program how the pipes are linked
between the apparatuses.
d.
Medium data per pipe.
e.
Reading in the optional data.
In each step the input data are where possible checked for accuracy. For each error which is
discovered, an error message is given. The program stops in that case after the whole inpu t
phase has been completed.
Step 2
Creation of system matrix
The calculation starts with the creation of the system matrix for the mass flow calculation. A
check is made that the number of equations corresponds with the number of pipes. If this is
not the case, then an error message follows and the program stops .
Step 3
Calculating compositions
In this step the medium types and gas compositions in the pipes are determined. There are
several apparatus routines for this , depending on the apparatus types used.
2-4