ENVIRONMENT
for all four spills even though the
wind speed and atmospheric conditions varied considerably.
Figure 5 shows measurements
made with the Anarad infrared
sensor, the only instrument in
150
100
propane. Theseare thefirst field
measurements ever made of differential boiloff of the various constituents of LNG. Differential boiloff
tO
|
&
°
a
2
2 50
e
10
6
Ob
8
qr
|
0
|
°
5,11
is important becauseit affects the
detonability of the vapor cloud.
Detonating pure methaneis
difficult; detonating methane
mixed with ethane or propane is
much easier.
(b) 50s
N
*?
B
0
among methane, ethane, and
|
(a) 10s
E
the array that could distinguish
|
50
100
|
150
Source
200 0
Distance — m
150
|
(c) 90s
1
50
|
100
|
150
200
Distance — m -
]
9
Pig. a
tld
.
Dot plots of a particle-in-cel!l
calculation
of the plumefrom the second 5-m? experi-
ment (a) at 108, (b)at 50s, and (c) at 90s. The large,
numbered dots are the instrument stations shown in
Fig. 1. A shift in wind direction (possibly influenced by a
e 100 [—
small hill) created a persistent kink in the plume.
|
is]
o
Cc
a
S sok
0
0
50
100
Distance — m
|
150
200
|
|
:
,
con 6-8 o07
vwliU
UO
}
33
:
_