RV "KRONPRINS HAAKON": HP AIR: CONSUMPTION / RATES <back to main page>
COMPRESSED AIR CONSUMPTION REQUIREMENTS
| Who
| Conf. no.
| Survey type
| Desired pressure
| No. and type of airguns - volume
| Firing rate
| Equivalent flow rate
|
University of Bergen
Dpmt of Earth Science
| 1
| Refraction
| 140 Bar
|
- 4 ea Bolt mod. 1500 airguns
- Each airgun chamber volume 1200 inch3 = 19.66 liter1)
- In total 4800 inch3 = 78.7 liter
| Firing every 200 meter, with max ship speed 6 knots, gives firing rate of 200/(6*1852/3600)
= 65 s
| (78.7 liter / 65 s) = 1.21 liter/s =
72.6 liter/min @ 140 Bar
|
| 2
| Reflection
| 140 Bar
|
- 4 ea Bolt airguns with various chamber sizes
- Total volume (typ.): 766 inch3 = 12.55 liter
| Firing every 50 meter, at max speed 6 knots, giving shot interval of
50/(6*1852/3600) = 16.2 s
| (12.55 liter / 16.2 s) = 0.77 liter/s =
46.5 liter/min @ 140 Bar
|
| 3
| Reflection
| 140 Bar
|
- 4 ea Bolt airguns with various chamber sizes
- Total volume (typ.): 766 inch3 = 12.55 liter
| Firing every 25 meter, at max speed 6 knots, giving shot interval of 8.1 s
| 1.55 liter/s =
93.0 liter/min @ 140 Bar
|
University of Tromsø
Geology Dpmt
| 4
| Reflection
| 200 Bar
| 1 airgun, 30 inch3 volume = 0.492 liter
| 3 s shot interval
| (0.493 liter/3s) = 0.164 liter/s =
9.9 liter/min @ 200 Bar
|
| 5
| Reflection
| 200 Bar
| 1 airgun, 420 inch3 volume = 6.883 liter
| 41 s shot interval
| (6.883 liter/41s) = 0.168 liter/s =
10.1 liter/min @ 200 Bar
|
1) Conversion from cubic inch to liters - this online converter is used.
"Worst case" equivalent flow rate is thus 93 liter/min @ 140 Bar
HP PIPING SYSTEM
HP OUTLETS / PIPE DIMENSIONS ON R/V "G.O. SARS" (Ø39mm)
On R/V "G.O.SARS", HP piping to the three outlets have Ø39mm outer diameter.
R/V "G.O. Sars, 2nd deck, HP outlet and airgun control cables junction box. HP pipe: Ø39mm outer diameter. Click to enlarge.
R/V "G.O. Sars, 3rd deck, HP outlet #1 and airgun control cables junction box. HP pipe: Ø39mm outer diameter. Click to enlarge.
R/V "G.O. Sars, 2rd deck, HP outlet #2 and airgun control cables junction box. HP pipe: Ø39mm outer diameter. Click to enlarge.
