International Dufour Grand Large and Dufour Performance Forum Forum Index International Dufour Grand Large and Dufour Performance Forum
For owners, users and anybody interested in the New Dufour Series. You are welcome to register and post!
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Generator

 
Post new topic   Reply to topic    International Dufour Grand Large and Dufour Performance Forum Forum Index -> Common Tecnical Issues - Dufour Grand Large & Dufour Performance Series
View previous topic :: View next topic  
Author Message
hloerch



Joined: 25 Jan 2015
Posts: 15
Location: Switzerland

PostPosted: Thu Jan 18, 2018 7:58 pm    Post subject: Generator Reply with quote

Hi gang,
I would like to know a bit about your experience with generator.
I think about the new EFOY to to power, up to 240 Amp a day, or a Diesel Generator eg. the Picolo which makes approx. 4 Kw.
Both are around the same price.

What have you on your boat?

Herbert
Back to top
View user's profile Send private message Visit poster's website
Milva



Joined: 28 Oct 2015
Posts: 15
Location: Sardegna / Italy

PostPosted: Sat Feb 10, 2018 3:37 pm    Post subject: Dynawatt Reply with quote

Grüezi Laughing

I'm thinking about installing a 220 V AC Generator directly on the main engine.
There a two devices on the market:
Dynawatt (Switzerland)
https://www.dynawatt.ch/dynawatt-de/produkte/dynawatt_5000/index.php

Whisperpower (Netherland)
http://www.whisperpower.com/ch/4/7/72/produkte/lichtmaschinen/w-bd-3.5-ac-belt-power.html

From my point of view they are more or less the same, avaiable in 3.5 and 5 kW versions. Pricing from 3 to 5 grands.

The problem is attaching the gen to the main engine, the volvo penta set is very expensive and made for either a mastervolt or a volvo generator.
Nevertheless i'm not sure if the volvo set is strong enough to transmit 5 kW of mechanical power.

My toughts in this solutions:

Pro:
- No extra motor, extra tank or petrol
- Producing power AND hot water while running the main engine
- Enough AC power to run a watermaker, dishwasher...at the same time
- The engine ist running anyway more or less every day
- No extra maintenance
- Less weight

Contra:
- More expensive then a Honda 2kW
- Difficulties on attaching the device onto the main engine
- Not portable

Adieu merci

Roman

_________________
SY Milva

Many thanks to Michael for this forum.
Back to top
View user's profile Send private message
TimOnders



Joined: 10 Mar 2008
Posts: 154
Location: USA, WA, Seattle

PostPosted: Thu May 10, 2018 4:02 am    Post subject: Reply with quote

The auxiliary engine isn't a particularly good option for power generation if other options are available.

First, the belt-driven accessories won't provide enough load on the engine. Running diesels at light load is both bad for wear and likely to build internal carbon deposits.

Second, your aux engine is very expensive relative to other potential power generators, and life is generally measured in operating hours. Running your aux for power generation uses some of the life of the engine, which is hour-for-hour more expensive than a generator or other power source.

Third, it tends not to be very efficient. Diesel power generation is most efficient when the load, generator and engine are all reasonably well matched and can run at constant speed. Since a generator on the Aux needs to accommodate variying speeds, the regulation system is going to introduce some losses.

If you have space, a diesel generator is probably the most cost-effective solution. You can feed it from a day tank that draws from the main fuel tank, or draw directly from the main.

The EFoy fuel cells are quite nice in that they're easy to install and essentially silent. They're probably more expensive to operate, and you need to consider availability of fuel in your cruising grounds, but they are quite nice (although limited in output capability).

If you don't have any major draws to accommodate (like air conditioning), consider buffering through a battery bank and inverter. You can charge the batteries from the generator/fuel cell at optimal generator output, and consume the power as needed through the inverter.

Cheers,
Tim
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    International Dufour Grand Large and Dufour Performance Forum Forum Index -> Common Tecnical Issues - Dufour Grand Large & Dufour Performance Series All times are GMT + 1 Hour
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group