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Author Topic: Iranian vacuum kiln  (Read 10079 times)

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Offline serg

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Re: Iranian vacuum kiln
« Reply #20 on: January 23, 2006, 11:08:23 PM »
For quality of a dry wood movement of air should be small.
 I use 0.5 m / second.
The fan will give speed having warmed up woods. SPEED of MOVEMENT of the MOISTURE FROM MIDDLE of the WOOD WILL NOT GIVE the FAN. It(he) necessarily will give dead zones and fast evaporation of a moisture from a surface of a board! There is no pair - there are cracks.
The temperature, vacuum, having warmed up - a pause, the top layer cools down increases a gradient of movement of a moisture from middle of a wood. Pairs constant - gives excellent(different) quality, prevents face cracks, I do not paint end faces of boards, I do not use some mastic! This work does(makes) pairs.
Precious breeds should be dried only in soft the diagram with constant humidifying a stack.
Sergey.

Offline Fla._Deadheader

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Re: Iranian vacuum kiln
« Reply #21 on: January 24, 2006, 12:00:43 AM »

 Thanks for that info, Sergey
All truth passes through three stages:
   First, it is ridiculed;
   Second, it is violently opposed; and
   Third, it is accepted as self-evident.

-- Arthur Schopenhauer (1788-1860)

Offline Den Socling

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Re: Iranian vacuum kiln
« Reply #22 on: January 24, 2006, 08:28:08 AM »
Sergey is right about the fan. A major problem with steam vacs is air circulation. It's hard to get air equally spread through a stack in a chamber.

It will be hard to know exactly how the process should be controlled but 1) keep the chamber pressure in a set range to eliminate that variable 2) control heating water temperature by monitoring internal wood temperature 3) control condenser temperature by monitoring humidity.

Are 'swamp coolers' used around your new neck of the woods?

Offline Fla._Deadheader

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Re: Iranian vacuum kiln
« Reply #23 on: January 24, 2006, 08:59:42 AM »

   :-[ :-[  What's a Swamp cooler ??  ::) ::)

  My plans are, paint the tank black and set in the sun. A lot of days are partly cloudy. Should WARM the tank, without getting REAL hot. That should help the wood to ''Sweat'', correct ??

  I think dis-continuous is the way to experiment. That way, monitor the amount of water, while comparing humidity and pressure ??

  I have a visual picture of how Serg uses the cool water to create the draft. We have LOTS of cool water. Just take a shower if you don't believe me. It's a REAL heart starter  ::) ::) :o :o
All truth passes through three stages:
   First, it is ridiculed;
   Second, it is violently opposed; and
   Third, it is accepted as self-evident.

-- Arthur Schopenhauer (1788-1860)

Offline Den Socling

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Re: Iranian vacuum kiln
« Reply #24 on: January 24, 2006, 09:39:45 AM »
A swamp cooler is an evaporative cooler or cooling tower. But when I say 'cooling tower', some people visualize Three Mile Island.  :D

Offline Fla._Deadheader

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Re: Iranian vacuum kiln
« Reply #25 on: January 24, 2006, 09:49:06 AM »

 When I lived in Arkansas, they had square metal boxes sitting on the porch, with a ''water cooler'' that was somewhat of an A/C ??  Something like that ??  I'm gonna be touring the scrap yards of San Jose Thursday. Need to know what to look for, and why ???
All truth passes through three stages:
   First, it is ridiculed;
   Second, it is violently opposed; and
   Third, it is accepted as self-evident.

-- Arthur Schopenhauer (1788-1860)

Offline Den Socling

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Re: Iranian vacuum kiln
« Reply #26 on: January 24, 2006, 10:44:35 AM »
yep that's a swamp cooler. All they do is dump water down over a 'fill' that makes a lot of surface area and that makes some evaporation and that cools the water that's left.

You're going to tour the scrap yards of San Jose?? You're a braver man than I, Gunga Din.  :D

Offline Fla._Deadheader

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Re: Iranian vacuum kiln
« Reply #27 on: January 24, 2006, 12:09:49 PM »

 No problema. I've lost over 30 pounds, and the guy taking me is REALLY outta shape  ;) :D :D :D

  Would something like that cooler be the way to mave the air and make the wood sweat. What about the black paint and sitting in the sun. Good or not ??
All truth passes through three stages:
   First, it is ridiculed;
   Second, it is violently opposed; and
   Third, it is accepted as self-evident.

-- Arthur Schopenhauer (1788-1860)

Offline Den Socling

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Re: Iranian vacuum kiln
« Reply #28 on: January 24, 2006, 01:53:00 PM »
On the one hand, I don't like the idea of black paint because we lose control. On the other hand, it would be nice to have really cheap heat. I'm still thinking about it.

Chamber pressure would limit temperature. Humidity could be used to control drying. Something might work.

Offline Fla._Deadheader

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Re: Iranian vacuum kiln
« Reply #29 on: January 24, 2006, 02:53:20 PM »

 Take yer time thinking. No big rush. Haven't seen the tanks, yet. That's Thursday, hopefully.

  Wanna get this right if we can, without too many changes.
All truth passes through three stages:
   First, it is ridiculed;
   Second, it is violently opposed; and
   Third, it is accepted as self-evident.

-- Arthur Schopenhauer (1788-1860)

Offline bmohebby

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Re: Iranian vacuum kiln
« Reply #30 on: January 30, 2006, 09:29:41 AM »

Dear Sergey and all other international friends;

I am really surprised when I read your message due to talking about our government and country. You and all friends should know that Persians are very warm and friendly people and there is nobody to force us for such contacts! I can easily access to internet from my office and keep in touch with everybody, I like.

I do believe that political borders should be put away and we must think and communicate as very close friends, even we have different nationalities. This is one of the life's beauties.

You, me and all human beings have same fate, necessities, sense etc. So, there is no need to borders. Politicians can not think in a right way, I believe. All of them even can't believe themselves; so how do they believe others?! They are always looking to find something for people to amaze them. It is their job and business. I do emphasize that DO NOT BELIEVE EVERYTHING IN MEDIA!!!! POLITICIANS ARE GOOD ACTORS AND ACTORESSES! Can you believe how many people were killed in Iraq for nothing? They were 120,000. It is a quiet big town or city. Who can judge it? When we all could think in a right way, PEACE presents us the best life. When we think darkly, WAR welcomes us. Which is better?

You and other friends might be interested to know about my country.  OK..

Iran is a huge country, with different climates, very similar to USA. It has a civilization for more than 7500 years! (the oldest civilization through the world). Iranians had believed different religions since then by now. They were Mithraism (believing LOVE), Zoroastrianism (believing a great LORD), and Islam (believing both of them). At the moment, majority of Persians are Moslem, Christian, Jews and Zoroastrian. All people with different religion live under a same flag very friendly. Iran has different ethnics. FARS (PARS=Persians who speak in Persian language), Turkmen (who speak in Azerbaijani, a type of Turkish language), Arabs, Kurds (the oldest ethnic in Iran who speak in Kurdish language. It is a type of Persian language) and Lors (who speak in Lory) etc.

My country has the youngest generation in the world and most of people are well educated. We would like to be as a very developed country. However, dark international challenges try to stop this country. Because, all media try to present a dark face of this country. I have been in Europe for several years and am familiar how other nations think about us. However, they change their mind when face with Persians and understand how they were pretended via media.

You and everybody is very welcomed to this country to find the reality.

With the best regards



Offline bmohebby

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Re: Iranian vacuum kiln
« Reply #31 on: January 30, 2006, 09:40:23 AM »

Dear DanG;
Hello
Thank you very much for your attention. It is able to work continuously and dis-continuously.

Regards
Behbood


Offline serg

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Re: Iranian vacuum kiln
« Reply #32 on: January 30, 2006, 09:55:33 AM »
bmohebby, hi!!!
I ask a pardon you for that that you have thought about bad!
I love IRAN, and as to political structure and applications of your PRESIDENT about deleting from the person of the ground of Israel to YOU to decide.
We discuss not a policy(politics) of Iran, WE discuss Vacuum technology of IRAN which was developed by YOU, she(it) is interesting to me. You long were silent on a forum so I have decided that at you censorship. If I am not right, once again I am sorry!
Now to vacuum technology.
You dry or change color wood? At you the mode of drying consists from 150 С? Or you apply 70 С?
Sergey

Offline DanG

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Re: Iranian vacuum kiln
« Reply #33 on: January 30, 2006, 10:24:01 AM »
Welcome to The ForestryForum, Dr. Mohebby! :) :)  We are excited to have you join us here, and are very interested to learn more about your kiln.  I have many questions about it, but will try to ask only a few at a time.

What chamber pressure are you using, and do you vary the pressure under any circumstances?  At what temperature do you operate it?  What types of wood do you dry and how long does it take?

These are very basic questions, so any other details you could share with us will be greatly appreciated.

Thank you
DanG
"I don't feel like an old man.  I feel like a young man who has something wrong with him."  Dick Cavett
"Beat not thy sword into a plowshare, rather beat the sword of thine enemy into a plowshare."

Offline Den Socling

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Re: Iranian vacuum kiln
« Reply #34 on: January 30, 2006, 05:43:38 PM »
Dr. Mohebby,

Welcome to the Forestry Forum. We are very pleased that you can join us.

I was very busy today and didn't have time for email or forums but I quickly wrote the note about language barriers after I got email from Sergey. He was concerned that his translation offended you - or so I think that was what he was saying. It's very difficult to understand his translations, sometimes.

So welcome, political barriers are not going to be in our way and we will work around the language problems. In another thread, we are talking about building a low tech vacuum kiln for Costa Rica. My idea is to create a rotation of air around a chamber by heating one side with the sun and condensing water vapor on the unheated side. Hopefully, you and Sergey will help.

And Sergey, when you don't know a word and can't find a translation,  :P You can always plug in one of these silly faces as punctuation.  :D

Den


Offline serg

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Re: Iranian vacuum kiln
« Reply #35 on: January 30, 2006, 11:21:59 PM »
Dr. Mohebby, Den correctly speaks. I completely believe his(its) words. Together we shall create a vacuum kiln  in CR!
Sergey.

Offline ronwood

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Re: Iranian vacuum kiln
« Reply #36 on: January 31, 2006, 01:35:38 AM »
Welcome to The ForestryForum, Dr. Mohebby!  Hope to hear more about your kiln.

Ron
Sawing part time mostly urban logs -St. Louis/Warrenton, Mo.
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Offline fstedy

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Re: Iranian vacuum kiln
« Reply #37 on: January 31, 2006, 03:18:24 PM »
WELCOME
                                                          smiley_biggrin01
                                        DR. MOHEBBY

I have been following this thread in the background and am very interested in building a Vac Kiln. I have been getting a lot of calls for thick fireplace mantels and I know they are difficult to dry.
Timberking B-20   Retired and enjoying every minute of it.
Former occupations Electrical Lineman, Airline Pilot, Owner operator of Machine Shop, Slot Machine Technician and Sawmill Operator.
I know its a long story!!!

Offline Norm

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Re: Iranian vacuum kiln
« Reply #38 on: January 31, 2006, 03:34:56 PM »
Welcome to the Forestry Forum Dr. Mohebby, nice to have someone to talk with from your part of the world. :)

Kirk_Allen

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Re: Iranian vacuum kiln
« Reply #39 on: January 31, 2006, 08:29:55 PM »
Welcome to the Forestry Forum Dr. Mohebby.  Looking forward to hearing more about your country. 


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