This is unlikely to be practical .. depends on your willingness to spend $$.
A trawler needs very little power to move slow, and far too much power
to move fast with current energy storage.
1/2 hp / metric tons is enough for slow speed use.
This is what all commercial boats used in the early 1900s.
For a 50 ft say 30 ton boat, 15 hp = 12 kw will be enough for decent
movement (80-90% hull speed == 7-8 knots).
A 36 kWhr usable battery would give you 3 hours at 12 kW.
Thats about 45 kWhr of lithiums (Lifepo4 etc).
At 300$ /kwhr == 14.000 $.
300 is about minimax for lithiums today.
Motor and drive cost very little, relatively.
3-phase mtor + VFD or servo + chopper from batteries to up the voltage.
About 1000-2000 each x 3 == 4-6000$ net.
Industrial 3-phase motors are dirt cheap, and last forever (50 years
plus++).
2000$ will buy nos motos in 10-20-150 kw sizes (price is about the same).
Look at surpluscenter for example, online.
Harsh service industrial is better than marine, lasts longer, and costs
about 10x less/unit.
Even upro 35x less/unit.
Bilge pumps are an example (35x cheaper), as are electrical conductors
and connectors.
On 01/02/2015 15:06, Scott Isbell isbell1s@yahoo.com [electricboats] wrote:
> unfortunately I dont have any info for you, but was hoping you can
> give me some. I am prepairing to convert one engine in a 50' trawler
> and was wondering what size boat you are working on and who you got
> your motor through.
--
-hanermo (cnc designs)
Posted by: Hannu Venermo <gcode.fi@gmail.com>
| Reply via web post | • | Reply to sender | • | Reply to group | • | Start a New Topic | • | Messages in this topic (29) |
No comments:
Post a Comment