"The Romaurie-Effect"

I have been using refrigeration compressors for many years as vacuum pumps. When I started in commercial/industrial refrigeration some 30 years ago, all the engineers in "Prestcold" Bournemouth branch made their own small portable vacuum pumps from discarded domestic refrigerators. It almost appeared to me, a newcomer to the industry, a competition of sorts to make the most practical/aesthetic unit possible.Some engineers made varnished wooden cases to house the compressor. These were ideal for all small refrigeration vacuuming requirements. My interest over the last few years has been to use these "home-made vac-pumps" to produce vacuum filled inverted aquaria. "The Romaurie-Effect" as shown on "youTube".This is an on-going project.

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birdwing988 years ago
Here's an alternative to your refrigeration vacuum pump. A simple aspirator device fitted to a water pump will provide suction. See here for explanation:

The aspirator in the article is used in chemistry labs, and attaches to a water faucet. I have a cheap one that is used to drain a water bed mattress. Remember those from the 1970's??? Here is a supplier: http://www.capitolscientific.com/estylez_item.aspx?item=P8541N

I have seen aquarium powerheads that included an Aerator that sucked air thru clear tubing.

Once you create water powered vacuum source, you simply hide the clear tubing in the silicon bead in the corner of the inverted tank.

If the aspirator blows its bubbles outside of the inverted tank, then you have positive displacement of oxygen. If the bubbles are being blown within the inverted tank, then you are just re-cycling the air.

I leave you to the engineering. Do searches for topics like "how to make an aspirator", http://en.wikipedia.org/wiki/Bernoulli%27s_principle , "venturi effect"

Here is great discussion of aspirators:

Search a plumbing supply house for faucet aspirator.

Amazon.com shows a waterbed fill/drain kit here:

When there is a power outage, what keeps the top tank from draining, as air flows backwards thru vacuum pump???
I'm guessing "The Romaurie-Defect."
romaurie (author)  birdwing988 years ago
I tested the vacuum with a venturi some 2 years ago with a small commercial water pump with venturi.Posted the result as a video on youTube and "Alan Molstad" perfected the engineering for this.He can be found on YouTube with a good explanantion on how this works.Not so easily found is a system developed in North Wales by an aquarist using an aquarium air pump modified to suck air from 1 inlet tube to remove the air from the aqarium and then return the air at the bottom to provide air bubbles in the tank.How he prevents shorting from humidity I don;t know.I tried this idea as well by placing the aie pump on a ledge at the top of the aquarium.The ledge is still visible in my video clips of the inverted aquairum. I personally like the small vac-pump method most.I am able to utilise old refrigertion microprocessors that have "failed" on their thermost feature but the defrosting control works.This gives me the time options of how many minutes duration the pump operates at what hourly interval I want.. I have also been using this principal to make a garden plant sprinkler with a n old washing machine solenoid valve fed by this processor.In refrigeration/air conditioning if the processor fails on one important parameter, it is replaced.Another fault I have discovered with these processors is that cockroaches often lay their eggs inside which eventually cause a short.This can often be be cleaned with switch cleaning spray. This idea originally came from a S.African doctor who used a clear plastic tube with 90degree elbows at each end to link 2 aquariums.He was filling the tube in a bath of water, sealing the ends and lifting the assembly into place and then removing the end seals under water.I applied the vacuum idea to this to negate the lifting and filling part.I have sent him details of all my R&D but have never heard back from him. The posibilities are endless.It also graphically demonstrates the practical uses of a vacuum.When I was at school, it was something taught without practcal demonstration.Accept the heating of a tin can, closing the lid, and then plunging said tin can into a bucket of cold water and watching the can crush by the created vacuum.I believe the best demonstration of how this works can be seen on my YouTube video clip of "pulling the vacuum" without a vac pump.I use a semi-rigid plastic tube to suck the air out out the inverted aquarium thus filling it with water. Never a dull moment!
romaurie (author)  birdwing988 years ago
A standard aquarium air line non-return valve is used to prevent loss of vacuum.The non-return being in the direction of the aquarium.
jonb1239 years ago
This is just too cool. I've looked at all the pics and vids I can find on this site and youtube and what not. Is there any site which has step by step instructions or lays it out a little more simply? Also, is there a simplified way to do this without large refrigeration type pumps? I'd love to do this but can't get too carried away as I may have to move soon.
romaurie (author)  jonb1239 years ago
I have tried by way of my video clips to lay-out all the moves to set-up either a linking-tunnel or inverted aquarium.The refrigeration pumps are not big expensive commercial vacuum-pumps that cost an "arm & a leg".This was the first thing I had to prepare after the company vac-pump nearly came to grief the first time I pulled the vacuum and the water shot back into the pump. Spent 3 hours flushing out the pump with special flushing oil.On my clips, I have shown how to use a small ex-refrigerator pump to do-the- do. First decide if you want to build a linking tunnel or inverted aquarium in a base aquarium. The latter is by far the more simple.Most glaziers balk at the prospect of buiding the tunnel without a CNC glass cutter to pr-fabricate the sides of the construction. Eventually I will prepare a step by step plan to make the simplest form of inverted aquarium.
Thx, look forward to the guide some time. I'm thinking about a smallish inverted aquarium. Do you think the youtube guy, fishfreedom is using a refridgerator pump like that? He doesn't give a lot of info... are they noisy? Bummer about the eyes, by the way.
romaurie (author)  jonb1239 years ago
The small compressors, 1/4h.p. or 3/8 h.p. are really quiet. most of the background noise on my videos is water flowing from the filter. And the feckin' neighbours! The Fishfreedom guy is a Mr.Ho in Singapore.He "welcomes comments on his system to improve it". I have sent him 3 emails detailing findings from compressor tests and air pump tests but have not received any reply.
romaurie (author) 9 years ago
Not related to the above, but maybe of interest: Laurie Duman to Melinda show details 03:51 (1 minute ago) I'm sat in the lounge in bloody agony, 3.32am. now. Woke up at 1.am with excruciating pain in eyes.As if sand was stuck in them and wont come out despite rinsing and soaking with camamille tea bags. I was helping Bensi yesterday with welding.I was holding the pieces in place while he welded.Problem is, its almost impossible not to catch a glimpse of the welding arc. Should have worn sun glasses. Its many, many years since I first had this. On that occasion I went to my G.P. and said I think I have arc-eye. She said she had never heard of it because [her words] she was a super-dooper internal medicine specialist and didnt need to know. So she gave me a note for the eye doctor. By the time I saw him, my eyes were OK.So, basically there is no cure accept to soak with the tea bags. What causes the problem is the intense arc light disolving the transparent protective film on the eyes.You dont feel it at the time , but by night, the hardened particles of film start abrading the eyes. Normally it would disolve in your sleep and in the morning that little bit of residue in the corners of the eyes that you wash away [sleep in your eyes] is gone naturally. The arc buggers it up! I learnt about it at S.R.D.E. but never got it till I came to Israel. Can hardly keep eyes open now but really painfull to close them. Not a lot of people no that.
royalestel9 years ago
Can you link to a vid, please?
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