Bergen B35:40, Project Manual

Page: 29 / 74

Starting and control air system
Page 2 : 5
2.01
, Gas
0615 BC
Starting air receivers and capacities
Ref. technical data sheets in part 1.04.
Data applies for engines in warm standby status
with a cooling water temperature of minimum 50°C.
The starting air receivers used by Bergen Engines
have standard volumes of 1000, 1500, and 2000 litre.
The starting air receivers are delivered with valve
head and equipment as shown in system drawing.
Required starting air receiver volume V
f
may be
calculated according to the following formula:
, m
3
where
N = Required number of starts N>2
V
ns
= Air consumption per start (Nm³)
P
max
= Max. pressure in starting air receiver (bar
g
)
P
min
= Min. pressure for start (bar
g
)
For multi-engine plants with simultaneous starts,
pipes must be sized accordingly.
Water separation
Generally the starting air is to be dry and clean.
One oil/water separator after each starting air
compressor is strongly recommended.
Water accumulated in the starting air receivers
during compression need to be drained at regular
intervals. In addition, depending on operating
conditions, water traps also are to be installed in the
piping system between the starting air receivers and
the engine(s). The piping to slope toward the water
traps.
V
f
N 1 –
 
V
ns
P
max
P
min
–
----------------------------
=