9Appendix
9.1Samples for battery calculation
9.1.1Typical Installation
GMDSS Battery size calculation for 1 hour (Battery size calculation based on the IMO regulations Chapter IV - Reg.13)
Ship Name |
| QMIII |
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Battery capacity | 230Ah |
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Battery Type |
| 2x (12V / 135) |
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| Area A1, A2, A3 |
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| Battery located in battery chest on observation deck | |||
Pos | Qty. |
| Equipment | Total (A) | ||
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| (A) | (A) |
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1 | 1 | Skanti TRP 8751D Radiotelephone | 45,00 | 3,00 | 25,50 | |
2 | 1 | Debeg 3818 DSC Controller |
| 0,21 | 0,21 | |
3 | 2 | T&T 3020 | 3,20 | 0,40 | 4,00 | |
4 | 2 |
| 0,85 | 1,70 | ||
5 | 2 | 1,00 | 0,20 | 1,40 | ||
6 | 1 | CI 8501 Navtex Receiver |
| 0,50 | 0,50 | |
7 | 2 | Skanti USE 300 VHF Radiotel. | 2,80 | 0,05 | 2,90 | |
8 | 2 | Debeg 3817 VHF DSC Controller |
| 0,21 | 0,42 | |
9 | 1 | Sailor RT2047 VHF Radio Tel. | 6,50 | 1,00 | 4,25 | |
10 | 1 | Simrad GN 33 GPS |
| 0,63 | 0,63 | |
11 | 1 | Koden KGP 900 GPS | 4,00 | 0,63 | 2,63 | |
12 | 1 | Koden LR 771 Loran C |
| 0,42 |
| |
13 | 1 | Emergency light |
| 2,00 | 2,00 | |
14 | 1 | AIS NAUTICAST™ Inland AIS | 7,00 | 0,75 | 0,84 | |
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| Total | 46,98 |
K1 partly discharged battery
K5
= Total consumption x 1,25 =58,73 Ah
= K1 x 1 / 0,30 | 106,78 Ah |
164,28 Ah |
Selected Battery (K5) = | 230,00 Ah |
K1 partly discharged battery =
correction factor taking care that the battery might not be fully charged (we assume that in worst case the battery is only at 80% fully charged)
correction factor taking care that the battery may be used at ambient temperature of - 30 degress
(at
K5 = correction factor taking care of that the battery is defined by manufacturer for 5 hours discharge time Calculation for AIS =
transmit pulse length 26,6ms with a maximum repetition rate of 2 seconds results in a maximum of 30 pulses/minute 1800 pulses/hour x 26,6 ms 47880 ms 47,88 seconds transmit time during one hour 47,88 seconds 0,8 minutes 0,0133 hours transmitting time during one hour operation
Above mentioned calculation assumes that all equipment is in operation which is normally not valid, that means that the actual consumption is lower.
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