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#935187 --- 12/10/08 07:01 PM Re: Gas/Water fireplace? [Re: Akisma Woodchuck]
Buddy Offline
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Maybe with the biggest smile you ever had. JMHO.
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#935548 --- 12/11/08 09:21 AM Re: Gas/Water fireplace? [Re: Akisma Woodchuck]
Yetta Nother Offline
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Registered: 12/26/06
Posts: 17682
Loc: Sunny and warm
Originally Posted By: Akisma Haryaz
I don't understand why the line filled with water that is heated doesn't blow the line wide open when it gets really hot.
I bet it is a neat unit. I'd love to have one. But to show up to look at it, well, I don't think I'd make it out of the house except maybe on a stretcher...


I wondered that too?
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#935954 --- 12/11/08 05:24 PM Re: Gas/Water fireplace? [Re: Yetta Nother]
Akisma Woodchuck Offline
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It has to have a pressure relief valve somewhere
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#935964 --- 12/11/08 05:37 PM Re: Gas/Water fireplace? [Re: Akisma Woodchuck]
Buddy Offline
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I know I have one. Hows about you pal?
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#936062 --- 12/11/08 08:09 PM Re: Gas/Water fireplace? [Re: Akisma Woodchuck]
Yetta Nother Offline
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Registered: 12/26/06
Posts: 17682
Loc: Sunny and warm
Originally Posted By: Akisma Haryaz
It has to have a pressure relief valve somewhere


Not that I am aware of anywhere.....unless it is the water spout which has a nut on the top.......
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#936089 --- 12/11/08 08:30 PM Re: Gas/Water fireplace? [Re: Yetta Nother]
Buddy Offline
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that is backwards, I don't have a clue!!!
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#936124 --- 12/11/08 09:41 PM Re: Gas/Water fireplace? [Re: Yetta Nother]
VM Smith Offline
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Registered: 11/28/05
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Originally Posted By: Yetta Nother
Originally Posted By: Akisma Haryaz
It has to have a pressure relief valve somewhere


Not that I am aware of anywhere.....unless it is the water spout which has a nut on the top.......


It's not a spout; it's a fill port.
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#936135 --- 12/11/08 10:00 PM Re: Gas/Water fireplace? [Re: VM Smith]
Akisma Woodchuck Offline
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Registered: 11/26/01
Posts: 1333
Loc: American Freedom Fighter
I'm turning my scanner on - waiting to hear of a fireplace blowing up at a green house....

water being heated in a closed loop will blow the pipe with no relief valve.
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#936138 --- 12/11/08 10:05 PM Re: Gas/Water fireplace? [Re: Akisma Woodchuck]
Buddy Offline
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Loc: Southend {Mars}
I am sure it vents, when pressure builds up. It is called steam.
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#936140 --- 12/11/08 10:18 PM Re: Gas/Water fireplace? [Re: Buddy]
Akisma Woodchuck Offline
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Registered: 11/26/01
Posts: 1333
Loc: American Freedom Fighter
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#936144 --- 12/11/08 10:28 PM Re: Gas/Water fireplace? [Re: Akisma Woodchuck]
Buddy Offline
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Posts: 19003
Loc: Southend {Mars}
Too much pressure, guess where it comes out? a whisp of steam every now and again.
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#936153 --- 12/11/08 10:42 PM Re: Gas/Water fireplace? [Re: Buddy]
Yetta Nother Offline
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Registered: 12/26/06
Posts: 17682
Loc: Sunny and warm
Oh Jesus.....now I need to know. You guys are scaring me.
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#936155 --- 12/11/08 10:45 PM Re: Gas/Water fireplace? [Re: Yetta Nother]
Buddy Offline
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Registered: 10/02/01
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Its ok, if the vent/valve was plugged it would have broken by now. Enjoy the extra heat. I think Harryass is messing with your head just a little.
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#936156 --- 12/11/08 10:47 PM Re: Gas/Water fireplace? [Re: Akisma Woodchuck]
VM Smith Offline
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Registered: 11/28/05
Posts: 38160
Loc: Ship of Fools
"I don't understand why the line filled with water that is heated doesn't blow the line wide open when it gets really hot.

It's not a line; it's a boiler. When the water is heated, steam is created, which is driven to the STEAM RADIATOR.

"It's only a closed tank, which is heated to make steam;"

Water os considered to be incompressible; steam isn't. So, the unit is designed to hold the design steam pressure without exploding. So many BTU, from so much gas flow, delivered at such and such pressure, through a pipe of a given diameter, will only produce so much heat, and thus so much steam pressure.

IOW, this is all pretty easy to calculate, and the unit is very robust, with plenty of safety margin built in.

How about we go over to your house, knock you out, bring you over to Yetta's on as stretcher, and then have her revive you?

It's worked well for me, so far, although she tells me her knuckles are getting a bit sore.
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#936159 --- 12/11/08 10:52 PM Re: Gas/Water fireplace? [Re: Buddy]
VM Smith Offline
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Registered: 11/28/05
Posts: 38160
Loc: Ship of Fools
"I think Harryass is messing with your head just a little."

Ya think?
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#936165 --- 12/11/08 11:04 PM Re: Gas/Water fireplace? [Re: VM Smith]
Akisma Woodchuck Offline
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Registered: 11/26/01
Posts: 1333
Loc: American Freedom Fighter
no no ...really... So you are saying this thing is over engineered to the point where there is enough pipe so that the expansion factor (the steam) cannot possibly exceed the strength of the engineered pipe size.

Ok, a steam radiator expels cold air thru a valve so hot steam can do its job (heat) on the cast iron (or log in this case) and the valve shuts when a temp is reached.

I still do not get how this works without a relief valve to expel the cold air in the pipe.
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#936166 --- 12/11/08 11:10 PM Re: Gas/Water fireplace? [Re: Akisma Woodchuck]
Yetta Nother Offline
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Registered: 12/26/06
Posts: 17682
Loc: Sunny and warm
Keep debating please.....I need this resolved.....carry on and thanks.
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#936167 --- 12/11/08 11:21 PM Re: Gas/Water fireplace? [Re: Yetta Nother]
Akisma Woodchuck Offline
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Registered: 11/26/01
Posts: 1333
Loc: American Freedom Fighter
VM thinks I am nuts, but I am really intrigued by this...

BTW - the stretcher thing, I am considering
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#936171 --- 12/11/08 11:35 PM Re: Gas/Water fireplace? [Re: Akisma Woodchuck]
Akisma Woodchuck Offline
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Registered: 11/26/01
Posts: 1333
Loc: American Freedom Fighter
Deaerator for Corrosion Prevention

Consequently, oxygen removal is well studied to limit corrosion in boiler tubes. Deaerator is most commonly used to rid feed water of dissolved oxygen.

Very briefly, the deaeration process uses live steam and mechanical agitation to encourage dissolved oxygen to escape from the water.

The liberated dissolved oxygen must be continuously removed from the deaerator, and hence, a small purge stream of steam from the deaerator becomes the accepted industrial norm.

The size of this required purge depends on factors like design capacity, efficiency and oxygen loading on the deaerator unit.


Typically, the vent rate is around one half to one percent for smaller, more efficient units and having lower make-up water. High make-up water requires vent rate of over one percent, typically in food processing industries.

Larger units typically vent at the higher rate to compensate because of lower efficiency. In practice, operating engineers often err on the conservative side and purge at a higher rate just to be on the safe side.

Purging nominally one percent of boiler capacity has been accepted as reasonable deaerator operation.




soooooooo - where is the deaerator?
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#936173 --- 12/11/08 11:41 PM Re: Gas/Water fireplace? [Re: Akisma Woodchuck]
VM Smith Offline
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Registered: 11/28/05
Posts: 38160
Loc: Ship of Fools
"a steam radiator expels cold air thru a valve"

Not true.
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