Samphire Stoves

ianj99 said:
I think you mean that the stainless steel simply takes longer to reach the same temperature as the aluminium, so there is more heat lost up the chimney during this time. I e warm up takes longer and efficiency is lower.
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No I don't think he means that. The heat transfer from the flame to the stove walls is not rapid enough to heat a stainless wall and transfer the heat through the stainless, probably in part due to the rate of heat loss up the flue. Aluminium on the other hand transfers the available heat rapidly, thus reducing the amount of heat going up the flue.
 
This is difficult to follow - the "heat transfer from the flame to the stove wall" is instantaneous - the flame is licking the wall. The walls of the stainless heater are very thin - do we really think that it takes three times as much fuel to produce a similar output to an aluminiium equivalent - - as the maker says? I would really appreciate answer as this heater looks so good and is unique.

BlowingOldBoots said:
No I don't think he means that. The heat transfer from the flame to the stove walls is not rapid enough to heat a stainless wall and transfer the heat through the stainless, probably in part due to the rate of heat loss up the flue. Aluminium on the other hand transfers the available heat rapidly, thus reducing the amount of heat going up the flue.
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chrisedwards said:
This is difficult to follow - the "heat transfer from the flame to the stove wall" is instantaneous - the flame is licking the wall. The walls of the stainless heater are very thin - do we really think that it takes three times as much fuel to produce a similar output to an aluminiium equivalent - - as the maker says? I would really appreciate answer as this heater looks so good and is unique.
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Not that I know, but it's to do with the rate of heat transfer through different materials from the sounds of it - according to the table on this page silver is best then copper, gold, aluminium. Stainless is way down the list. But I bet that's not the whole picture. It is a very nice heater, I live on my Vega and it would suit the boat very well, getting hold of the fuel would be the issue...
 
sgibbs said:
dear comrade red
aluminium conducts heat 5 times better than stainless steel. If the stove was stainless steel the heat produced in the interior by the burner would mostly stay in the interior as this metal will not conduct the heat so readily to the outer surfaces where its needed. A simple experiment to prove this fact would be to hold 2 equal size rods one of ally one of stainless over a candle and find out that one can be held a lot longer than the other. Also heat that is not being absorbed properly will be lost via the flue.
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Hactually it was chrisedwards :)
 
Looks really nice but it's a shame it doesn't draw air from the cabin. One of the benefits of a stove with a flue is that it causes a forced air circulation and hence, effectively, dehumidifies and heats simultaneously. You can achieve the same result with a pressure lamp placed on the floor, below an open, or partially open hatch, with another open (or partially open) hatch at the other end of the space you're heating.

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The heat transfer thing. It's drawing in a certain amount of air in order to fuel the flame. Assuming it's operating at the same rate, in steel or aluminium casing, then the same amount of heated air combined with combustion products will be travelling up and out of the flue after existing and expanding inside the body of the stove. As the steel radiates heat much less effectively, the inside wall temperature of the stove will be higher than that of the aluminium alternative and so less heat will be transferred in a given time from the heater air/combustion products, to the walls of the stove and the flue. As some of you said, the heat must go somewhere, yep, out of the chimney.

Heat transfer rate from one temperature source (the combustion products) to another (the inside wall of the stove) is proportional to the temperature gradient/difference.
 
Interesting stove, just saw it the other day on ebay. 2.4 KW heat output sounds rather good too, might give it a thought (depending on how well the Pansy performs this winter). Since quality Optimus burners have been unavailable for some time now the Taylor's isn't really an option for me.

Anybody tried one?
 
2nd_apprentice said:
Interesting stove, just saw it the other day on ebay. 2.4 KW heat output sounds rather good too, might give it a thought (depending on how well the Pansy performs this winter). Since quality Optimus burners have been unavailable for some time now the Taylor's isn't really an option for me.

Anybody tried one?
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By sheer coincidence I emailed them today to set up a working demo for me to see before I buy. I've used the Pansy charcoal heater for the past few years and while it heats my boat quite well, (full time liveaboard) it's a grubby 'ol thing..:D
I'm hoping the Samphire will be cleaner to live with, ie: minus the dust..
If I buy it will be a while before it's installed and operational, but I'll put something in 'Liveaboard Forum' if all goes according to plan.
 
Downsman said:
By sheer coincidence I emailed them today to set up a working demo for me to see before I buy. I've used the Pansy charcoal heater for the past few years and while it heats my boat quite well, (full time liveaboard) it's a grubby 'ol thing..:D
I'm hoping the Samphire will be cleaner to live with, ie: minus the dust..
If I buy it will be a while before it's installed and operational, but I'll put something in 'Liveaboard Forum' if all goes according to plan.
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Why not have a word with Richard or Snooksie and see if you can do a write up for one of the mags after the demo? Be nice to read about something that isn't "performance clothing" or another bit of electronics (not a dig at the mags - I know that's what there is that's available).
 
Downsman said:
By sheer coincidence I emailed them today to set up a working demo for me to see before I buy. I've used the Pansy charcoal heater for the past few years and while it heats my boat quite well, (full time liveaboard) it's a grubby 'ol thing..:D
I'm hoping the Samphire will be cleaner to live with, ie: minus the dust..
If I buy it will be a while before it's installed and operational, but I'll put something in 'Liveaboard Forum' if all goes according to plan.
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I'll watch this space then :D
 
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