Page 8 - HVAC Pump Handbook

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Digital Electronics and HVAC Pumps

Digital Electronics and HVAC Pumps 5

Program options
System sizing
Flow simulation
Cost estimate

Flow simulation options-typical entries
Maximum iterations 30
Intermediate results Every 3 iterations
Temperature tolerance for convergence 0.50
Relaxation parameters 0.50°F
Fill pressure 46 ft of head (or H O)
2
Pump data
Variable or constant speed
Points for pump curves

Terminal data (coils, etc.)
Fluid flow
Pressure drop
Coil cfm (ft /min)
3
Inlet air temperature
Leaving air set point

Valve data
Valve coefficient
Trial setting
Valve control

1.2.2 Typical output for APEC piping
system analysis program
Table 1.1 includes samples of output headings, with one line of output
for only three output forms available. The output also has forms that
mirror the input, so the designer has a complete record of the entire
analysis.
This program is now being expanded to include many additional
piping features and to accommodate contemporary computer prac-
tices such as Windows, to speed the development and manipulation of
project data.

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