Radio Frequency Vacuum Kiln

[@backwoodsengineer]

Why does the vacuum pump need compressed air? If you’re using a Venturi system, it’s probably the least efficient way to generate vacuum. Put in a good rotary screw vacuum pump and save yourself some energy costs. Cool video! Thanks for the explanations!

[@robintaylor-mockingeemill8223]

Looks like the future of drying lumber .

[@conradanderson9196]

Is that rust on the door of the kiln? I thought the interior of these were supposed to be stainless. I know yall have had the kiln for a while by now...how's it been holding up?

[@abdussamadshaikh3467]

Hi. What are those radio frequency plates made of. Are they cheap or expensive? Are they powered or connected to some electricity source.

[@BigNicky77]

So cool!!

[@mattweaver5196]

GREAT!!!

[@Live.Vibe.Lasers]

I think 6,800,000 cycles / sec. MHz..not kHz. correct me if I'm wrong 🙂

[@greatitbroke]

Great info thanks for sharing. Fun to see the inside workings.

[@legacylumber592]

Thanks for watching!

[@cn6762]

Very cool! Where did you learn all this stuff? Your brother did this stuff I thought I remember you saying? Awesome business you have, just so unique and people wouldn't even know this existed or happened to those fancy pieces of furniture in their workplaces or favourite bar lol

[@legacylumber592]

Mostly learned from breaking things and the internet, thanks for watching.

[@densocling1235]

The real question here is the drying cost. What does it cost per 1000 board feet to dry wood? With RF/V, a lot of electricity is lost as heat exhausted from the RF generator. With water heated plates heating the wood, essentially every watt is going to heating water to vaporize it. RF/V is terribly inefficient. In addition, that walnut is nearly indestructible but lets see him dry some Red Oak. If you want a good laugh, talk him into a load of White Oak.

[@gantulgagankhuyag108]

Thank you man, that was a huge investment for my future wood kiln thanks again!! i was just wondering that is it okey to put them all together without any sacing in between? because this was the first kiln where timbers are not isolated to let some air go through?

[@slhasebroock]

Very cool! Thank you for showing the Vacuum Kiln, very interesting. Is it expensive? I assume it is.

[@GUEST-qw4te]

Wouldn't it be easier to do 4 square sides, keeping the log whole, that way when you cut it, its already a final size.?

[@ericbartoszak5211]

What’s the moisture content before and after ??

[@dave-in-nj9393]

very cool. I never knew there was that much technology to drying wood.

[@RobertFay]

[Very informative. Smart system.] Do i get it right, this is a slow and gentle vacuum microwave oven (oh, wait, you just how said that)? and so... if i turned off the vacuum and turned off the microwave oven part, i could use as a large temperature controlled Craft Beer brewing environment, right? ||| And with that, may I once again raise a toast to Mirthful Irreverence Everywhere. [ Cultivate A Sense Of Wholesome Emotional Hygiene ]

[@jtjones73]

So a huge, air-tight, low wattage, microwave oven. Very cool.

[@whatthefunction9140]

didnt he say 20000 watts?

[@davidkernes1279]

I had thoughts about vacuum drying lumber but thought it wud be much more involved than what you showed here

[@free_at_last8141]

Good video, thanks, subscribed.

[@douglaspohl1827]

Can you demonstrate or explain the science? "RF shaking water out"? Doubtful science... but vacuum with temperature removing water... yes!

[@candygeng9288]

radio frequency cause water to vibrate and rub and generate heat

[@theredwoodguysnewzealand15]

Hey this is a great video thanks FOR TAKING THE TIME TO MAKE IT. We have a small timber mill in New Zealand working exclusively with Californian Redwood (grown in NZ). We have just added a small dehumidifier kiln to our business. We have to use this style kiln as Redwood needs a slow and low dry cycle otherwise we get a large amount of cell collapse. . Your kiln is very interesting to me, but i worry that causing the water molecules to heat up from within the cell structure might cause cell collapse. Do you have any thoughts on this? What is the adjustability like for difference lumber sizes and species? . Last question - is this method faster than other kiln drying? You mentioned 10 days for those massive slabs, that seems incredibly fast, what is the MC% when they come out? Thanks for taking the time to look at my question. John Webster - The Redwood Guys (NZ)

[@stephenbercik3626]

Do these kilns kill bugs in the process?

[@markvreeken]

Thats a real cool bit of kit there Thanks for the tour

[@MURRAYHTPURCHASE]

Well explained and detailed. Love the results of the wood. All the best hope to see the new operation.

[@legacylumber592]

Thanks Murray!

[@patricletourneau1801]

thank you for all the great info...

[@ThomasBarone]

I know this is edited but you are a very good speaker.

[@nicholascarver1]

A big space microwave.

[@michaeltexasmoore1724]

How does the wood do when you store it? Does the EMC take affect?

[@paulnovak833]

Would it be possible to thermally modify lumber with this?

[@MrThenry1988]

That's crazy fast. Good show. No stickers. Wow.

[@patmatt975]

If a customer brings you lumber with the ends sealed, do you have to remove the sealer for this process to work?

[@stephenbercik3626]

No stickers necessary?!???

[@floydbrennan2884]

Wow that's awesome you do not have to sticker it that saves a lot of time right there I may need to get more information

[@legacylumber592]

Yes stickering sucks!

[@juancarloslaimerojas9967]

Good afternoon I would like you to help me know how the radio frequency generator works and how it is built, what elements it has to design a prototype oven for smaller quantities of wood, I thank you very much.

[@candygeng9288]

I can explain the principle and operate process for you, it have smaller size kiln chamber.

[@peterjansen4894]

It's a microwave. You say oxygen, but you mean air.

[@legacylumber592]

I guess air is more then just oxygen, thanks

[@poiholloi5415]

6k8hz is RF(ish) but far from the microwave band

[@bengille7002]

Are those English Pointers you have hanging out there?

[@igbanebridge6204]

6:08 absolute mad lad

[@VideosByAl]

That is a lot nicer to load than a WM. I loaded a WM once and that was enough for me. We have a Conventional Hot Water Kiln that we end load like you do. Great video

[@densocling1235]

He is swinging the chamber pressure from 68 Torr to 90 Torr. The boiling point of water at 68 Torr is 110'F which is about the maximum temperature you should expose wet wood to. He is cycling up to 90 Torr where the boiling point of water is 121'F and that is too hot for wet wood.

[@edschultheis9537]

Why are the wood slabs not separated with an air gap between them? It seems to me that would be necessary to greatly increase the exposed surface area so that the wood will dry faster. But perhaps the RF would not work properly then. Hmmm?

[@adamnapolitano432]

Oh my gosh, that pile at the end, I can't imagine how many months and years it would take to dry it the traditional way. What happens to all the water? Like yes it evaporates but surely it cools and reconstitutes back into water somewhere, does it just get pumped down a drain with other water waste?

[@bandmillbob8907]

Man after reading all the comments all I can say is the hate can get real at times... sorry but I thought the heat belonged in the kiln... 🤣

[@jyll.7132]

Clicked through expecting a spa equipment guide. Found a burly dude with an RF kiln. Not mad.

[@jeffreyagar5161]

How did you convince Christian Bale to do this how-to video!? But seriously, great video.

[@sungazer888]

Shouldn’t the sensor probe be inserted into the middle side of a slab? Since the water comes out of the ends?

[@kapdolkim1914]

Very cool.

[@James.......]

Those vacuum kilns are amazing. I'd love to purchase one eventually. Where is yours manufactured?

[@legacylumber592]

James this is a Chinese made kiln by DX Haibo

[@mmtreeservice2338]

@@legacylumber592 How much did this Chinese made kiln cost?

[@tomblanco2001]

Does this process kill wood boring insects?

[@candygeng9288]

it shows radio frequency will creat an electric field,will kill insects

[@Jimo225]

how much do you get in monetary value for a fully packed kiln full of wood?

[@markw5805]

He is “microwaving” the Wood with lower frequencies.

[@grumblycurmudgeon]

That's precisely what he's doing.

[@nickwatt2988]

Soooo sick

[@thomasparrott2599]

do you have a video showing how you cut cookies>

[@chukwumaojeogu6508]

What happen if the electricity goes off ?

[@densocling1235]

Hey, is that junk still running?

[@greggraber8299]

Huge capacitors interesting

[@hadleymanmusic]

So you kiln cants?

[@ryanrockwell916]

What does a set-up like this cost to build?

[@peterdickerson2629]

What do you do with the water

[@jkenfore]

Where does the water go?

[@stevenriviere1496]

So there are no stickers used to allow for airflow and no fans?

[@candygeng9288]

yes, no stickers, because vacuum kiln don't need air to flow

[@hadleymanmusic]

You cut wood too?

[@DaHighRoad]

Y not dry logs before cutting them?

[@legacylumber592]

Once dry the wood is much harder, resulting in very difficult sawing for a sawmill.

[@pusheen_playz7172]

Hi, great video and very informative. You guys produce some beautiful items. I am seriously considering buying one of these kilns for my business. How much does that beast cost to run each 8day cycle ? I have heard that it’s as low as $20 a day ? This seems too good to be true ? Again keep the videos coming , I really enjoy watching and learning from you guys 👍

[@densocling1235]

This technology was rejected by the forest products industry around 1980. The cost of drying is high because most of the electricity is lost as heat. Moisture content is unacceptable because the dielectric field is not even throughout the load. Honeycomb is common. Operation is difficult because the wood is part of the electric circuit. As moisture content decreases, the oscillator must be readjusted. Maintenance is difficult and dangerous because of very high voltage and frequency. RF/V is simply a terrible idea that the Chinese are trying to use to turn a buck.

[@dylandong888]

You know, now it's 2019, but unfortunately, your cognition stuck in the '80s. I want to say, technology is changing faster than you can imagine, you have to get this point, Sir.

[@VKMilling]

@@dylandong888 no, Den is actually correct. HF Vac kilns are notorious for ruining the structural integrity of timber. It's why we wouldn't ever use HF vac kiln material for timber framing.

[@impactodelsurenterprise2440]

Jesus 20kW

[@rustyweiss4426]

Does the 46" wide door opening frustrate you frequently? What are your thoughts now on size of kiln you purchased? I'm sitting on 60" wide slabs and of course, I want them dried. Is there much of a market for slabs that big? Perhaps I'm off the mark thinking wider is better. ???

[@densocling1235]

When he drills a hole for his thermometer, the wood surrounding the hole is going to dry faster than the wood deep inside so he will get a false reading.

[@mrLEO.y]

thanks a lot, great video, would you tell me how much does it cost to buy the klin ?

[@daveklein2826]

Do your research