Standard Control Features And Functionality - Ingersoll Rand X8I Manual De Utilización

Example 1: Find Required Storage Volume in Ft3 and US
Gal.
(4) - 100 Hp Compressors at 450 CFM (12.7 m3) each /
15 seconds to start and load a compressor. 5PSIG is the
maximum allowable pressure drop.
T=15 Seconds (.25 minute)
C=450 ft3
Pa = 14.5 PSI
Delta P = 5 PSI
V = [.25 x (450 x 14.5)]/5
V = (.25 x 6525)/5
V = 1631/5
V = 326 Ft3
1 ft3 = 7.48 Gal
Gal= 326 Ft3 x 7.48
Gal = 2440
Example 2: Find Required Storage Volume in m3 and L.
(4) - 100 Hp Compressors at 450 CFM (12.7 m3) each / 15
seconds to start and load a compressor. 0.34 BAR is the
maximum allowable pressure drop.
T=15 Seconds (.25 minute)
C=12.7 m3
Pa = 1BAR
Delta P = .34 BAR
V = [.25 x (12.7 x 1)]/.34
V = (.25 x 12.7)/.34
V = 3.2/.34
V = 9.33m3
1m3 = 1000 L
L= 9.33 m3 x 1000
L = 933
STANDARD CONTROL FEATURES AND
FUNCTIONALITY
STANDARD SEQUENCE CONTROL STRATEGIES
The standard configuration of the X8I provides ENER
(Energy Control) sequence control strategy, Priority
Settings, Table Selection, Pressure Schedule, and Pre-fill
operation.
ENER: Energy Control Mode
The primary function of Energy Control mode is to:
1/ Dynamically match compressed air supply with
compressed air demand.
2/ Utilize the most energy efficient set/combination of air
compressors to achieve 1/.
Energy Control mode is designed to manage systems that
include compressors of different capacities and different
air compressor types (fixed speed, variable speed and
variable capacity) in any combination or configuration.
Control and Rotation:
Compressor control and utilization is dynamically
automated with adaptive control logic and therefore
does not follow pre-determined schedules, rotation
configurations or time intervals. Energy Control mode
can, however be operator influenced by the Priority
functionality which is discussed later in this manual.
Energy Control mode is enabled by the ability of the
X8I to process individual compressor capacity, variable
capacity capabilities, and changes in system pressure to
dynamically implement and continuously review 'best fit'
configurations as demand variations occur.
1
2
4
2
1: Demand
2: Supply
PRIORITY SETTINGS
The sequence assignment pattern can be modified by
using the priority settings.
Priority settings can be used to modify the rotation
sequence assignments. Compressors can be assigned
a priority of 1 to 8, where 1 is the highest priority. Any
compressor can be assigned any priority and any number
of compressors can share the same priority.
Priorities allow you to set up rotation groups. All
compressors that have the same priority number will
rotate inside their own group. The group with the highest
priority will always be in the front of the sequence.
For example, in a four compressor system including one
variable speed compressor in the compressor 1 position
you may want the variable speed compressor to always
be in the Lead position. By assigning compressor 1 a
priority of 1 and the other three compressors a priority
of 2, the variable speed compressor will always remain at
the front of the sequence:
1
A
1
A
2
A
3
A
4
Compressor 1 has priority 1, all other compressors have
priority 2
15
1
1
2 3 4
C
C
C
C