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Reduce compressor running time with up to 50%

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skipper View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote skipper Quote  Post ReplyReply Direct Link To This Post Posted: 23 April 2012 at 10:18
2 parts pu foam, for details please read the First page of this post. Over the years and yacht models could the insulation (or lack of it) be very different. I can only describe our yacht model.

Here is another insulation yacht project, sharing my view on the benefit with 2 part PU foam



Edited by skipper - 29 June 2015 at 15:20
Cheers,
Skipper
Hanse 342 2005 (Sparcraft mast, white hull, wheel steering, deep draft keel, short rudder)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MarcoC Quote  Post ReplyReply Direct Link To This Post Posted: 24 April 2012 at 09:46
Anyone who has done same job on a 370 as Skipper done on his boat? It would be nice to hear how you you did it. We have condence problem with the back of the saloon sofas and dont know how to get rid of the mold stains. But w elike to prevent future problems by having a better insulation.
"Älva"

Hanse 370#671

Stockholm, Sweden

www.wesailhanse.se big wheel, deep draught iron keel, 3 cabins,Yanmar 3JH4E, Sparcraft rig.
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Markku View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Markku Quote  Post ReplyReply Direct Link To This Post Posted: 24 April 2012 at 16:11
I'm going to do similar job by using flexible thermal insulation plate which will be pushed and pulled in place, first around the walls and then separate piece under the box. As preparation, I already cut a large square shape hole to the wall behind the cushion to allow better reach to the area. I don't know yet how to tight the insulation in place, perhaps with glue or pulling around some wire or thin rope. It will be anyway hidden so perfect look is not important, just that we will have better insulation to reduce compressor operation time. I haven't noticed that we had any moisture problem probably due to some free space between the box and interior walls.
 
I'm also going to do additional noise insulation in the engine locker. Hanse really didn't do good job with that either so there are large not insulated areas letting noise to go through.
 
 
Markku 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Idelfix Too Quote  Post ReplyReply Direct Link To This Post Posted: 24 April 2012 at 21:28
It is a joint between the refrigerator's two parts that are badly twisted.
They two parts widens probably when the fridge is cold.
I've tried to come out with a thin knife between the 2 parts and found major gaps in the fridge when cold.
But they disappear again when it is turned off and gets warmer.
If this slot opens up inside the wall against the cushion, it may cause condensation
I have sealed the joint with Sikaflex and I will post info when it is test driven









Edited by Idelfix Too - 24 April 2012 at 21:36
"Idelfix too" Hanse 430e -08
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Post Options Post Options   Thanks (0) Thanks(0)   Quote skipper Quote  Post ReplyReply Direct Link To This Post Posted: 31 July 2013 at 09:45
Measured compressor running time on a typical Swedish summerday morning around 10, seawatertemp 20 degrees Celcius, the lady onboard has put the control on "7", 15 cm from top of box 5 degrees C .
Compressor idle time 8:20 = 500 seconds, running time 1:10 = 70 sec.
Fantastic figures 70 / 570 = 13% running time

Check your running time and consider if it is worth the effort to insulate your fridge or not, at least on older yachts cold be constructured as ours without any insulation.

Measured a second time in the afternoon of a warmer day, 22% running time more in line with my measurement 1-2 years ago. Still evidence that the insulation has payed off .

Cheers
Skipper

Edited by skipper - 15 October 2013 at 18:06
Cheers,
Skipper
Hanse 342 2005 (Sparcraft mast, white hull, wheel steering, deep draft keel, short rudder)
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Gregor View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gregor Quote  Post ReplyReply Direct Link To This Post Posted: 31 July 2013 at 21:48
With all improvements and changes I made (look at my website for the story and photo's), if the cabin temperature is 25 degr. I set the thermostat on 3, the inside temp becomes 5-7degr. It runs 4 times p/h for 1'30" to 1'45" Not too bad, if I may say so :)

Gregor
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Currently sailing Dehler 36 JV (2002)
Previous boat: Hanse 311 #80

http://www.uisge-beatha.eu
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skipper View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote skipper Quote  Post ReplyReply Direct Link To This Post Posted: 01 August 2013 at 15:55
My personal view on the condensation issue is that warm air meets a cold wall behind the sofa and as Bynos friendly made me aware of do we still suffer of condensation even with the improved insulation

Edited by skipper - 05 August 2013 at 05:18
Cheers,
Skipper
Hanse 342 2005 (Sparcraft mast, white hull, wheel steering, deep draft keel, short rudder)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote H8jer Quote  Post ReplyReply Direct Link To This Post Posted: 03 August 2013 at 15:47
Hi Skipper and Gregor

With those readings on running time - can you then stay at almost 100 % if you got a solar-panel? what do you think?

About condensation. Here is a picture of the cooler box bottom, Yes it is all water drops. The box has 20-30 mm foam built in from the factory. But looks like that needs to be improved.



Last season I had to emergency replace the compressor, due to the old one had a fluid leak.
I am still learning how to manage the settings, so the milk is not frozen. I use a wireless thermometer in a plastic bag.

/H8jer

Hanse 370#480 30HP 3-cabin
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fendant Quote  Post ReplyReply Direct Link To This Post Posted: 03 August 2013 at 18:47
Well it looks as if I have a serious problem with my fridge on a Hanse 345. Water Temp currently is 24 deg C and cabin inside is 28 - 30 deg.  I have installed a wireless temp sensor on the back wall 20 cm  below the top opening.
 
Temp set was adjusted to max!  Nevertheless the fride does not cool below 13- 15 deg. C?
 
Any suggestions are "coldly" welcomedSmile
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gregor Quote  Post ReplyReply Direct Link To This Post Posted: 04 August 2013 at 22:27
@H8jer, serious condensation. You van put extra insulation material at the bottom an aside, however it does not help very much. A little bit better than it is by now.

@Fendant you can try to have your compressor refilled. Probably with R134a. If there is not enough gas inside, the cooling is poor.This can be done by yourself if you have the right nipple for the compressor. Having an engineer coming over is expensive, at least in The Netherlands.

Gregor
Uisge Beatha

Currently sailing Dehler 36 JV (2002)
Previous boat: Hanse 311 #80

http://www.uisge-beatha.eu
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