BULK
CNG ROAD TRANSPORTATION
Bulk CNG road transportation is a long-proven
method of delivering natural gas to markets. From stranded gas resources or to
stranded gas markets.
CNG
road
transport
systems
and
operations
can
flexibly
be
established
for
either
short-term
or
long-term
contracts.
The trucking of CNG can serve,
for
example,
as a temporary
delivery of natural gas in the interim to a pipeline being available for the
transport of natural gas, or as a means of establishing a market in order to
justify the infrastructure cost of a pipeline.
Or to
markets
where
pipelines
cannot
be
practically
or
economically
constructed.
Another
use is
delivering
gas to
CNG fuel
outlets.
CNGI can provide services for the road transportation
(trucking) of bulk CNG from supply
source to an offloading point at market. CNGI Services include pre-operating
Consultancy
(including
case
studies), Project Management and, the ongoing Operations Management. Either
on a separate service or full turnkey basis.
CNGI can provide or arrange the complete CNG system
delivery encompassing the loading compression station facilities – the
transportation by CNG trucking -
and end receiving decompression / let-down station facilities, and storage (gas
holding) system. Loading
source can be from a take-off point on a high-pressure gas transmission pipeline
or a wellhead at a natural gas field or coal mine (methane).
Typical markets include a power station and/or
peaking plant [direct or peak fuel supply] - a town and residential estate
reticulation system, commercial premises and industrial park distribution
[wholesale or retail supply].
CNG is transported by specialized road trailers.
Trailers
can
carry up
to
300,000scf.
A
road-train
consisting
of a
three-trailer
combination
can
transport
up to
900,000scf
at a
time.
CNGI
has
developed
a
generic
road-rig
design
for a
CNG Road
Trailer.
The
standard
model
CNGI CNG
Road
Trailer
has a
capacity
of
around
160,000scf
(standard
cubic
feet) or
4,500scm
(standard
cubic
metres)
of CNG
product,
the
equivalent
of 168
GJ (gigajoules)
- this
model
will
suit in
particular
a road
weight
limit of
42.5
tonnes
with a
semi-trailer
rig.
A
CNG
(Tube
Trailer)
Road Rig
CNGI can deliver a range of gas volume, from
small volumes in a single delivery load
that can
be
drawn-down
as
demanded over a time period (trailer storage), to large volume capability by
multiple trailer shuttle deployment between the loading compression (mother)
station and the offloading (daughter) station
locations.
The
number
of CNG
trailers
needed
in an
optimized
project
will
depend
on
taking
into
account
the
principal
factors
of the
annual
delivery
load
volume
and peak
demands,
road
distance
between
loading
and
unloading
points,
the
regulatory
road
weight
limit
applicable
as well
as
competent
authority
approval
for the
transport
route,
the
loading
compression
and
unloading
decompression
rates
available,
and as
well any
gas
storage
capability
required
to be
included.
Some
advantages
of CNG
versus
LNG:
-
Particularly
suitable
for
short/medium
distance
projects
-
Short-term
contract
ability
-
Less
capital
required
-
CNG
system
is
quickly
mobilized
having
a
short
lead-in
period
for
set-up.
A
typical
project
would
be
six
months
-
Consenting
issues
minimal
-
All
the
CNG
assets
involved
are
take-away
can
be
moved
easily
and
quickly
to
another
market
or
project
-
The
CNG
system
is
easily
scalable
by
simply
adding
trailers
and
increasing
compression
station
capacity
Compressed
Natural
Gas
International.