MASE generators

[Portofino]

With a few recent threads about s Onan ,s heat exchangers scaling up leading to overheats and shutdowns I thought to share an alternative method .
Seems trouble free from a scale POV .
How they get around it.It is air cooled .
The engine cylinder is finned like a VW beetle engine or older BMW motorbike R1000 type
So no need for sea water engine coolant HE , as no engine coolant to exchange heat in the 1st place .

No need for sea water to ever see the engine or windings of the geny bit .
Instead they have a seawater air HE , which just looks like a mini car radiator .
Here seawater is pumped through and air sucked by a fan through it ( from under the bilge ) to cool it then sucked across the windings fins then the engine cylinder fins the out .
There’s a few cowls to direct the air and the box has to be pretty sealed so s not to cock up the air flow .
When it’s turned off there’s just seawater at seawater temp left in the HE , - crucially no hot engine circuit coolant to “ bake “ on the salt - so the HE never actually clogs up .
Just needs a pencil anode every now and again .
Very simple .

You could argue they are noisey ,but they are in a so called sound box .
They do small genys with the seawater / air some medium and will build to customer requirements .
They also do conventional HE - seawater / engine coolant
Just seems like a neat solution to proverbial salting up of HE,s
This ones a 2002 modal still going strong , there not a lot left to go wrong once the seawater s taken out of the equation.
Engines are either Yanmar or Kubota - so no change there

https://imgur.com/a/VEq7YOU

 

[rubberduck]

I have found them to be good, & only ever had comments about how quiet it is at the swim platform, don't notice it onboard either, used overnight many times on the Thames.

 

[rustybarge]

With a few recent threads about s Onan ,s heat exchangers scaling up leading to overheats and shutdowns I thought to share an alternative method .
Seems trouble free from a scale POV .
How they get around it.It is air cooled .
The engine cylinder is finned like a VW beetle engine or older BMW motorbike R1000 type
So no need for sea water engine coolant HE , as no engine coolant to exchange heat in the 1st place .

No need for sea water to ever see the engine or windings of the geny bit .
Instead they have a seawater air HE , which just looks like a mini car radiator .
Here seawater is pumped through and air sucked by a fan through it ( from under the bilge ) to cool it then sucked across the windings fins then the engine cylinder fins the out .
There’s a few cowls to direct the air and the box has to be pretty sealed so s not to cock up the air flow .
When it’s turned off there’s just seawater at seawater temp left in the HE , - crucially no hot engine circuit coolant to “ bake “ on the salt - so the HE never actually clogs up .
Just needs a pencil anode every now and again .
Very simple .

You could argue they are noisey ,but they are in a so called sound box .
They do small genys with the seawater / air some medium and will build to customer requirements .
They also do conventional HE - seawater / engine coolant
Just seems like a neat solution to proverbial salting up of HE,s
This ones a 2002 modal still going strong , there not a lot left to go wrong once the seawater s taken out of the equation.
Engines are either Yanmar or Kubota - so no change there

https://imgur.com/a/VEq7YOU

What happens to the hot air exiting the genny: does it just go into the engine room?

 

[Portofino]

What happens to the hot air exiting the genny: does it just go into the engine room?

Yes then redrawn across the sea temp rad to cool it - again and again .
Also the ER air temps get pretty hot after shut down .
Never had an overheat - yet ,
Crucially the sea water in the rad only reaches seawater temp so less likely to crud up .

 

[rustybarge]

Yes then redrawn across the sea temp rad to cool it - again and again .
Also the ER air temps get pretty hot after shut down .
Never had an overheat - yet ,
Crucially the sea water in the rad only reaches seawater temp so less likely to crud up .

It would be simple to set up a separate forced air ventilation system for the ER to vent the area when the engines aren't running. It appears to be counter intuitive air cooling a Genny inside a sound proof box in a hot ER, but Fendt tractors are air-cooled and can work in hot conditions with no hitches.

I have a little 4kva single cylinder lister diesel air-cooled Genny in an open frame: might make an interesting project putting it in a box and shoving a mini rad inside to cool it.

 

[rustybarge]

It makes a hell of a racket , 3000revs I think.

 

[Av8R]

I have 32 Century twin outboards and had a 2005 Mase 2.5. Lasted 15 years of good reliable service. The air cooled w HE really does work well. Since I have outboards the only thing in the engine room is the genset so never very hot in there and mind you this is South Florida. Noise is relative if the hatch is closed it’s just a rumble. After 15 years it’s finally time to replace and I’m going w another Mase of course now it’s known as the 4.04b. Excellent customer service I hope I get another 15 out of this one.

 

[Portofino]

Mine fired up + the sound of a trickle of water straight away after 8 months ....
I have put some extra sound proofing inside the box , and the ceiling of the ER ....it’s all good .

 

[rosssavage]

deleted cos I misread the op!