Hybrid Propulsion system

[daniel smith]

Hi all of you,

I have a small Boat of about 15 m. I just want to know about
what do you mean by Hybrid propulsion system? how it is working?

which are the companies which made Hybrid propulsion system for pleasure craft or yachts?

reply me if anyone knows about it

Thanks in advance

Regards

Dainel

[daniel smith]

hi,

Still waiting to get appropiate reply on this subject

curious to know something

help me out

Thanks

[Nurb]

What specific goals do you have for this boat?

Hybrid means the combination of two different systems into a hybrid... for example, diesel electric. For 99.9% of pleasure boats, there is no advantage and therefore very few hybrids. Battery energy storage capacity /weight or /cost is very inefficient compared to liquid fuels. An additional system or energy conversion means additional losses, costs, and complexity.

Hybrid systems are used for:

1.) vessels with special uses. E.g. http://www.soundingsonline.com/news/...electric-power

harbor tugs in the ports of Los Angeles and Long Beach spend 60 percent of their time operating at less than 20 percent of their full power ... The hybrid tug can use different combinations of its power system, depending on its power needs. The main diesels and electric motors/generators work together when the tug is assisting a ship. ... The main engines are off over 50 percent of the time," Hayman says. "They only run the main engines when they're moving a barge or doing a ship assist."

2.) vessels with extremely high house loads in proportion to propulsion (a.c. & accommodations power)

3.) people willing to pay an extreme monetary premium for the idea of running on batteries and the ability to motor relatively short distances at slow speeds, silently and with zero emissions.

[FAST FRED]

Save money and purchase an "I am green T" shirt , at least it will have both a primary (T shirt) and secondary use (rag).

FF

[daniel smith]

Hi to all,

Thanks for the information Nurb, it is very useful for me

Fred,

I did'nt understand what u r taking about?

please clarify it

[Nurb]

He is saying unless you have a very special application (rare) where a hybrid system makes sense, don't. Don't seek "hybrid" only because someone is marketing it as "green" or so you can tell your friends you are "green". It has to make sense, and there aren't many marine applications yet where it does for a boat. When you have the application, it will fit, no big-stretch-marketing necessary. Start by listing what you want to achieve exactly.

[gonzo]

We used diesel/electric on offshore oil surveying vessels. The reason for it is that the electric motors have finer and faster speed control. For us, precision on speed was critical. Fuel economy was a far second.

[Eric Sponberg]

There was a good article on Hybrid propulsion by Nigel Calder in a recent issue of Professional Boatbuilder magazine, issue #127, page 30, "Marine Hybrids Come of Age." Nigel has been following the developments of marine hybrid propulsion for a few years now, and you will find earlier articles in PBB that he has written on the subject. The major players he cites in this newest article are: ZF/Beneteau (France); Greenline Hybrid (Slovenia); Mastervolt/Bellman (US); Hybrid Marine (UK); Green eMotion (South Africa); and the HyMar Project (consortium of 8 European companies).

Another company that has done a lot of work here in the US is EMotion Hybrids, here in Florida. Owned by David Tether, he has installed a number of hybrid systems on boats, systems which are very versatile, taking power from solar, wind, free-wheeling prop, generator, or shore power. He has done a lot of work on reducing the size of and increasing the power of the batteries. His wegsite is: http://www.electricmarinepropulsion.org/.

Eric

[CDK]

Originally Posted by daniel smith

I just want to know about
what do you mean by Hybrid propulsion system? how it is working?

To keep it simple: an installation which generates energy unsuitable for direct use and then convert it into another form.
Example: a genset converts fuel into mechanical power, then generates electricity and an electric motor converts it into mechanical power.

Every conversion step has its toll, so overall efficiency is low compared to conventional propulsion.

[FAST FRED]

"Every conversion step has its toll, so overall efficiency is low compared to conventional propulsion."

The second problem is whatever storage system is chosen , most are very slow to accept energy , and the amount of energy stored is minor , compared to usual propulsion loads.

FF

[daniel smith]

Hi all of you,

Thanks for all the information about hybrid propulsion system

but there is one question in mind what are the prices of hybrid propulsion system and electric propulsion system of different companies?

reply me soon

regards

[Eric Sponberg]

Daniel,

You'll have to contact the various companies for prices. Many systems are different, they have different components and different controls. Prices will vary quite a lot because it is a relatively new industry. I recommend contacting a few of the hybrid companies with the specifics of your boat--principle dimensions, weight, desired speed, and intended use--and they can come back to you with proposals or estimates. You can also contact a few diesel engine manufacturers for prices on their engines so that you can compare systems.

Eric

[schakel]

Greenline is such a succes they extend their range with a 40 footer and a Greenline ocean class 70.

http://www.greenlinehybrid.com/

They are great!!!

[Chase_B]

I have a motor that I designed ,..still a work in progress,..I can get it to rotate,..but it will not take a load ,...yet,..tolerances are the key to getting it to take a load ,..on my 4th build now,.. this time I'm "closing the gap" on all tolerances so that it will at least run a small generator,.. I'm a bit concerned with posting the mechanics of this device,..but ,..it doesn't use any source of burnable or expandable fuel, or cellular..it is completely self contained,..start it walk away,..come back once in a while just to knock the dust off of it. once I get it right and it has run for 12 months straight ,..non stop,..then I will unveil it,.. it is still theory until proven,..not kidding myself, its a viable/physical thought in motion,..that has potential,..at the risk of ridicule ,..I click "post reply"

[fcfc]

Originally Posted by schakel

Greenline is such a succes they extend their range with a 40 footer and a Greenline ocean class 70.

http://www.greenlinehybrid.com/

They are great!!!

I am truly amazed by the real marketing genius of greenline.

They are able to make people think a boat with a 7000 liters (1860 gal) tank, burning around 81 gph / 306 l.h at a top speed of 21 kts is green.
(Engine not listed, so fuel burn estimed with cat C15 ACERT 800, Volvo D13-800 has similar figures)

Btw, 306 l.h at 21 kts is 790 litres /100 km or 0.29 statute mpg.

I forgot. The hybrid version has a 3 Kw.h solar panel. Probably to help the 1188 Kw propulsion engine to pollute significantly less.

The competitor that need to increase its marketing team : http://www.cnb.fr/pdf/CCruiser.pdf .
Same power 2* 800hp.
Nearly same beam. 5.80 vs 5.93
Heavier at half load. 50t vs 46.5t (7% heavier)
Longer on waterline 23m vs 19.56m (17% longer)
Finally better top speed 24 kts vs 21 kts. ( I guess due to LWL increase)

But definitely not GREEN ....