Gensets specifically for hybrid power sail (mono & multi)

Archim, reduced voltage is going to eat into both your system and proposulsion efficiency.

 

Yes, I am not far from being convinced that the 144vDC system from David Tether is the most efficient hybrid DE on the market currently. Maybe the reason why Calder chosed to install an eMotion motor in his new Malo. I'll sleep on it...

 

Archim

Not brushless, but pretty good and being used. These are Asmo motors.

Pdf for their 17kW motor.

http://www.asmomarine.com/2005/asmo_uk/pdfs/Asmo_Marine_THOOSA_17000.pdf

Here is their website.

http://www.asmomarine.com/2005/asmo_uk/04.shtml#Q01_12

I'd be interested in your assessment.

Thanks,

Pericles

 

ASMO motors

Pericles,

ASMO use Lynch motors. Although ASMO state that their motors are 'up to 93%' efficient, this is likely to be for the 72 V Thoosa 13000 motor, at peak efficiency -which generally is a half the rated duty. As seen above, the efficiency of brushed motors and controllers can drop down sharply when speed hence voltage go down. It is a pity those dealers do not give the overall efficiency of their systems at various rpm.

Also, the Lynch motors are rated IP 20 so I don't know whether ASMO does anything particular to tropicalise them, or if they have to be installed in an immaculately dry and clean environment.

JC

 

For a start, this can go here SOLAR PANELS - NEW DEVELOPMENTS

http://www.abc.net.au/news/stories/2008/05/29/2258722.htm
UQ makes solar-power 'breakthrough'

Queensland researchers say they have made a major breakthrough in renewable energy technology.

Professor Max Lu from the University of Queensland says they have been able to grow titanium oxide crystals, which could be used in solar power cells and water purification and recycling devices.

He says the material is cheap and easy to produce and it will make solar energy more cost-effective.

"The promise of such a crystal is, because it's such a high-reactivity surface that we're creating, they will enable the boosting of efficiency in terms of solar energy conversion to electricity," he said.

"In other words, if this can be made into a solar cell it is going to be much more efficient."

He says the technology will make solar power more cost-effective, but concedes that it is up to 10 years away from being commercially available.

"This has shown great promise. The prospect of this in the area of renewable energy is huge," he said.

 

Some more information on the developments at UQ can be followed here . http://www.uq.edu.au/news/index.html?article=14818

 

Jeff (moderator),
Is there any way to correct the last line in the first post of this thread as it no longer has a link to go to???
If the link cannot be repaired then could that last line be deleted?
Thanks mas...

 

A Bob Oram 44'C is due to be launched in April 2009 with "glass/composite legs made by builder and Re-e-power motors and PolarPower Volvo-penta driven "disk" generator giving 11KW and 22KW in parallel with the batteries....

I am looking at the Torqeedo 2000R legs (either 2 or 4) for my Bob Oram 39'C (no regen as yet but price and weight are good) and build commencement in April 2009.. I have opted for 24v DC system for house & drive and 12v for ship, nav & diesel genset start/management - - - all is not 'set in concrete' yet, as dual 24v systems have a point in redundancy/backup...

Another 44'C is closer to build completion than mine has ordered a pair of torqeedo 4000R legs, batteries, solarpanel system & controller package - this will be the 6th Bob Oram designed boat he has built and will be for himself....

http://www.torqeedoaustralia.com/Torqeedo_Australia/Products.html there should be links back to find your local distributor - else just google "torqeedo" ...

I am trying to get info on these sites offerings http://www.adelaidesolar.com.au/page?pg=18 and http://www.onsitepower.com.au/products/marine/dc722m.htm

 

Polar DC Geneset

http://polarpowerinc.com/products/generators/index.htm

Available in 12Vdc to 600 Vdc. Standard voltages are 24Vdc (28Vdc) and 48Vdc. Generators Range between 1-10kW

http://polarpowerinc.com/products/pdf/genset_prices.pdf
Price list is 2006 ?

Does any one ever used one ?


http://polarpower.org/static/docs/GeneratorWhitePaper2_1_05.pdf
For cold weather users, a global white paper about off grid power questions:

 

Man, this thread is over a year dead???

Genset similar to theirs, (polarpower), is on "Schools' Out", (a recently launched Oram sailing cat), using a Volvo 2 cylinder engine direct coupled with the electrics from a US coy that went quiet or bust... Polar power is bloody expensive here in Australia, I used a Kubota 3 cyl marinised engine from http://seawasp.com.au/index.html and a pair of Delco 20 pole alternators to give 48 volt and a peak charge of around 6000W... The Delco's are belt drive...

The Genset and 8 solar panels rated at 200W each will help to charge up to 16 spiral wound Optima D34M AGM batteries to give 220A at 48VDC to power 2 x 4000W 48V Torqeedo electric "outboard motors weighing in at less than 17KG each... Galley is all electric using inverters to deliver domestic power (220VAC in Australia) so I can run normal Australian domestic appliances...

I figure on less than one hour running the genset each day, - less on a good sunny day in the tropics, and to kick the genset in if I need to motor any distance... My boat will be launched 'soon'...

 

FOR A BIG ALT '

DELCO 50 DN 270 AMP 24 VDC ALT

These are avilable rebuilt for about $500 or so.

FF