Typical coooling water temperature-out on gen. set

balboa · 10-07-2007, 03:12 PM

Hi there, again :-)

I'm looking for a heat-exchanger solution that uses hot cooling water leaving my auxiliary engines to heat up fresh water for domestic purposes that will be circulated continously.

After this heat exchanger, my cooling water will enter a keelcooler.

I came accross what looks like a good solution but wondered, what's the typicla temperature of cooling wate when it leave the engine?

This here is a link to a turn-key 'British' solution.

http://www.stokvisboilers.com/HeatPlateExchangers.asp

Thanks for your feedback.

Thorwald

TSI AV · 10-08-2007, 11:54 AM

Hi,

Outlet water temperature may be different. Normally, 70-75 deg C.

However, I experienced that it is up to 85-92 on some brands.

My experience covers only commercial fleet, but, I hope that physics also works in a superyacht industry,

So, some of commercial ships are equipped with a system, which utilizes the heat, produced by auxillary engines.
It works good. We even did not use the diesel oil boiler in winter time. The system could handle all domestics + heating of HFO storage, settling, service tanks.

If You are looking for heat exchangers, please consider:

www.gea-westfalia.com
www.alfalaval.com
www.apv.com
www.ami-exchangers.co.uk

There are more brands of course, but I recommend only those, what I operated / dismantled / cleaned.

I hope, that this info will be useful for You,

rgds,

Andrei

balboa · 10-08-2007, 12:33 PM

Thanks.

In fact, over the weekend, I found two almost turn-key solutions.

This UK one almost out of the box:
http://www.stokvisboilers.com/HeatPlateExchangers.asp

And this Dutch one (also available with Alfa Laval) needs a little more work of putting together the items but both solutions are made specifically made to use hot cooling water to heat up tap water.

http://www.itho.nl/Pages/Itho.aspx?F...5E02/8549.aspx

Thorwald

Innomare · 10-16-2007, 04:29 AM

Hi Balboa,

I have seen another possible installation where the cooling water from the ME's or gensets is led through a jacket around the boiler before returning to the boxcooler or keelcooler. You can do this for example with a tank-in-tank boiler from ACV (http://www.acv.com/int-en/03_10/20/app.rvb?prodfam=10).

This way, the cooling water keeps the boilers warm and you will use your electric heater much less. It saves you a separate heat exchanger.
I would recommend to use the genset cooling water, as the main engines are hardly ever used on yachts.

PS, Andrei, what's this love affair with Wärtsilä?

Cheers,

Bruno

balboa · 10-16-2007, 09:35 AM

Thanks Bruno and others,

That's a pretty perfect solution, combining the best of both, no, 5 worlds:

- heat exchange with cooling water
- storage
- backup-heating capacity
- simple
- looks like most affordable

Thorwald

They also have a US rep. it seems at www.triangletube.com.

TSI AV · 10-16-2007, 10:24 AM

Hi,

Balboa, I'm glad that You've found the solution,

Bruno, it's a long story ...

I worked with 6R32, 12V32, 6R46, 6L64 engines ...

And now I have to deal a lot with Wartsila, because our ships are equipped with
6R32, Deutz (now Wartsila), Wichmann (now Wartsila).

So, the love is for real ...

rgds,

Andrei

YachtForums · 10-16-2007, 10:38 AM

Andrei,

You've been bumped to senior status. Should have done this along time ago. You've always provided helpful and informative posts. Thank you!

(BTW... avatars must be marine related)

TSI AV · 10-17-2007, 01:06 PM

Yeeeah !

Many thanks, Carl.

Yachting keeps on infecting me... slowly and steady... it's serious...

P.S. Avatar is under consideration...

rgds,

Andrei