Diesel-electric hybrid - Page 2 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 


Like Tree7Likes
Reply
 
LinkBack Thread Tools
  #11  
Old 02-19-2012
deckofficer's Avatar
Senior Member
 
Join Date: Feb 2012
Location: Northern & Southern California
Posts: 101
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 3
deckofficer is on a distinguished road
Maybe I'm not explaining my intentions very well. I love to sail, and on my old Cal 40 had minimum systems to contend with. I'm quite a bit older now and like certain creature comforts. I don't want or need a trash compactor, washer-dryer, etc., but do want a microwave (who doesn't) and a REAL watermaker that doesn't require constant membrane replacement, noisy, and low output of the 12 VDC types that are available. This means clean, reliable AC power, which is what pure sine wave inverters are for. Plus on the efficiency side, a diesel engine with its weak kneed torque curve is very inefficient at any rpm other than at the peak torque rpm. An electric motor is efficient through out its operating rpm range. The last ship (rig) I served on was a 32,000 ton off-shore drill ship that I held position over the hole with (6) 5000 hp electric motors. I had (7) 4.6 Mw generators that ran at their torque peak of 900 rpm (also divisible by 60 for frequency). If enviormental loads where high, i.e. 40 kt wind and 3 kt current, I could burn 1,000 gallons of diesel per hour to hold position. That may not sound efficient, but believe me if not diesel electric, it would consume much more, but again it couldn't be done without the low rpm torque of an electric motor. An electric has all available torque at 0 rpm, no IC engine can even come close.

To address Chef2Sail question on weight, it is expensive to keep the weight down, as you need to use LiFePO4 batteries. These cells, with proper care will have a 5000 cycle life at 80% DOD, so at my age, will outlast me. The diesel gen set is a large weight saver if you chose a unit that is a PM DC output over a conventional AC gen set.

This is a picture of that ship (rig) I described. Unlike Captain "Showboat" Schettino, my ship is butt ugly, so no need to salute an island with it. It is a diesel-electric hybrid, but mine will be scaled down a bit.
__________________
Bob
WL7GS Whiskey Lima 7 Gone Sailing

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #12  
Old 02-19-2012
Member
 
Join Date: May 2009
Location: Placencia, Belize
Posts: 40
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Chkm8 is on a distinguished road
Hi, I guess you will be using ... lifp04 lite weight batteries and are you thinking of the Ausie elect outboards? .. Paul
Reply With Quote Share with Facebook
  #13  
Old 02-19-2012
Member
 
Join Date: May 2009
Location: Placencia, Belize
Posts: 40
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Chkm8 is on a distinguished road
I missed part of your message why not 48 volt high toque water maker only buy motor ONCE
Reply With Quote Share with Facebook
  #14  
Old 02-19-2012
Junior Member
 
Join Date: Feb 2012
Location: Orgon
Posts: 21
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
robmo is on a distinguished road
Hi Bob,

Who are you buying the Li-ion bats from? Be careful with those things,remember what happened to the Chevy Volt. Those danged things will burn.

Cheers,

Scott
Reply With Quote Share with Facebook
  #15  
Old 02-19-2012
deckofficer's Avatar
Senior Member
 
Join Date: Feb 2012
Location: Northern & Southern California
Posts: 101
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 3
deckofficer is on a distinguished road
There are a number of electric outboards currently available with new ones coming to market. The Torqeedo 4.0, a 4Kw unit from Germany is expensive and they are missing the boat (no pun intended) by not having regen. The amount of thrust matches a 9.9, which is what is used on PDQ 36s. AquaWatt outboards have the physical dimensions of a 9.9 and come in two flavors, a 13Kw (a pair of these are over kill on the PDQ) and a 23Kw.

aquawatt green power electric outboard motors

Note the weight difference between these DC gen sets vs an AC gen set. You won't find an 8Kw AC diesel gen set for 290 lbs like this DC unit.

http://www.propulsionmarine.com/wp-c...e-Brochure.pdf
__________________
Bob
WL7GS Whiskey Lima 7 Gone Sailing

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #16  
Old 02-19-2012
deckofficer's Avatar
Senior Member
 
Join Date: Feb 2012
Location: Northern & Southern California
Posts: 101
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 3
deckofficer is on a distinguished road
Quote:
Originally Posted by robmo View Post
Hi Bob,

Who are you buying the Li-ion bats from? Be careful with those things,remember what happened to the Chevy Volt. Those danged things will burn.

Cheers,

Scott
I have bought from these folks before building EVs. And these batteries are not the type with thermal issues.
Thundersky Lithium Batteries
__________________
Bob
WL7GS Whiskey Lima 7 Gone Sailing

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #17  
Old 02-19-2012
larrytwo's Avatar
Member
 
Join Date: Aug 2011
Location: Lund b.c.
Posts: 61
Thanks: 3
Thanked 0 Times in 0 Posts
Rep Power: 4
larrytwo is on a distinguished road
Intresting and informative thread. Thanks. A freind was telling me about a electric sail drive out now that charges back into it's system when sailing. Motor/generator? can't remember the make darn it. check this one out... Vetus Electric Drive EP2200 - French Marine Motors Ltd
__________________
B.C. coast videos.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Member, Canadian Coast Guard aux, unit 55. 1980/1998
Reply With Quote Share with Facebook
  #18  
Old 02-19-2012
deckofficer's Avatar
Senior Member
 
Join Date: Feb 2012
Location: Northern & Southern California
Posts: 101
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 3
deckofficer is on a distinguished road
Quote:
Originally Posted by larrytwo View Post
Intresting and informative thread. Thanks. A freind was telling me about a electric sail drive out now that charges back into it's system when sailing. Motor/generator? can't remember the make darn it. check this one out... Vetus Electric Drive EP2200 - French Marine Motors Ltd
It is a hot emerging market with new players at every turn. It is too bad the Lagoon 420 series offered with electric drive was a rushed concept that some owners have pulled the motors and replaced with diesels.
__________________
Bob
WL7GS Whiskey Lima 7 Gone Sailing

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #19  
Old 02-19-2012
Member
 
Join Date: Dec 2011
Posts: 93
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 3
BCC1 is on a distinguished road
Quote:
Originally Posted by robmo View Post
I guess my general advice is falling on deaf ears.
Unrequested, unrequited, unhelpful....advice.
Reply With Quote Share with Facebook
  #20  
Old 02-19-2012
Senior Member
 
Join Date: Jul 2007
Location: Philadelphia
Posts: 828
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 8
Ulladh is on a distinguished road
I applaud your approach, and while I am not ready for the leap to electric sailboat motors it will take you and others to keep plugging at making it work for the rest of us.

I have an on-line friend in SF Bay who has converted a 25ft double-ender to a 48volt electric system recharging at dock and reports usable power to the electric motor for at least 8hrs.
__________________
1970 Havsfidra 20 by Fisksatra
On the Delaware River at Fox Grove Marina Essington PA
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Diesel/Electric Hybrid ronspiker Gear & Maintenance 8 07-09-2008 01:17 PM
Diesel-Electric sailing320 Boat Review and Purchase Forum 22 10-31-2007 01:54 PM
hybrid electric bluetommy77 Gear & Maintenance 11 10-20-2007 01:35 PM
AGM /Gel Hybrid Batteries TAK Gear & Maintenance 11 05-16-2007 05:51 PM
New Dubois 44m opts for diesel electric (Yachting and Boating World) NewsReader News Feeds 0 02-13-2007 01:15 PM


All times are GMT -4. The time now is 09:06 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.