[Pablo2079]

http://www.thedailygreen.com/environmen ... l-47120305

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Waste tires pile up and can catch fire? Zap it.

The world is running out of oil? Zap it.

Frank Pringle wants to use microwave in a vacuum to make alternative fuel from waste tires. How much? With 50 cents' worth of electricity, according to the Philadelphia Inquirer, he can make a 14-inch car tire into 1.2 gallons of diesel, 7.5 pounds of carbon black, 50 cubic feet of combustible gas and two pounds of — get this — high-strength steel. (If you're keeping score, 50-cent diesel is about one seventh the price at the pump these days.)

[FrankRichards]

$this->bbcode_second_pass_quote('', ' ')1.2 gallons of diesel

[yesplease]

$this->bbcode_second_pass_quote('FrankRichards', 'F')ifty thousand miles on the tires, then fifty on the diesel. Nice to be rid of the tires, but as a fuel source, not so much.

[aahala]

I don't know about the diesel aspect but tires have a considerable
amount of energy that can be released by burning them. Unforetunately, the process releases some very unpleasant chemicals one would not desire.

[aflurry]

might be a good techniques for recycling tires, but how much diesel does it take to truck those tires to the big microwave?

it may not really apply to this case, as old tires really are a nuisance, at least right now, but i wonder how much opportunity cost is lost in neglecting reuse in favor of this kind of high tech, high concept recycling.

alot of work went into the manufacture of the tire, and their unique shape can make them useful for building, for instance.

http://www.earthship.net

i'm not sure about the relative merits in this specific case, it's just an example of how people forget that it is one concept with three components: Reduce, Reuse, Recycle. And in that order.

Why do we focus so much on the last, least effective, to the exclusion of the first two? I would guess it's because of the three, recycling is the most capital-friendly.

[JRP3]

$this->bbcode_second_pass_quote('aflurry', 'm')ight be a good techniques for recycling tires, but how much diesel does it take to truck those tires to the big microwave?

[microwavetire]

Well Frank Pringle is right, there is diesel,carbon-black and steel in them there waste tires but he does not have the right technology down pat. First he claims microwave frequencies in the 4 to 18 gigahertz range in his patent application, These are military frequencies not available to public use, second there is only one klystron [ the microwave source Frank claims to be using]available in the 4 gigahertz frequency and it cost $15000.00 to $20.000.00 versus a magnetron of conquerable power at $1200.00 processing a tire at a lower cost of 35 cents. We know this because we at Tire Chef Inc. have a unit running at our Missouri plant using magnetrons in the 2.45 gigahertz frequency range that are off the shelf and scalable at high powers at viable economics. Frank is a late comer to the field and has only apparently done bench top experiments. We at Tire Chef Inc. have researched the field of microwave tire,coal, wood and other hydrocarbons since the 1970 oil crisis and have developed equipment for tire recycling, patent # 7101464 and for coal, oil shale, oil sands and other hydrocarbons. Sincerely Joe A Pringle Tire Chef Inc.

[Ming]

This approach can only be interesting from the point of view of disposing of the large number of "unecological" tires discarded every year.
It clearly has no value whatsoever as a fuel producing technology...
(What is the energy balance of the process?)

Even Carhole, the energy “expert” that believes microwaves are sound waves, would discover this EROEI issue…

[microwavetire]

The cogeneration ratio on the oil is showing a 1 BTU in to 6 BTU out. This means we can generate 6 times the electrical power that we use. Several Out side sources suggest the same ratio for the hydrocarbon gases. This would represent a huge source of oil and gas. It would not wean us from imports but in this game every little bit counts.

[Ming]

$this->bbcode_second_pass_quote('microwavetire', 'T')he cogeneration ratio on the oil is showing a 1 BTU in to 6 BTU out. This means we can generate 6 times the electrical power that we use. Several Out side sources suggest the same ratio for the hydrocarbon gases. This would represent a huge source of oil and gas. It would not wean us from imports but in this game every little bit counts.

[microwavetire]

We get an average of 1 gallon of oil per tire. The BTU content of the oil at 18000 BTU per pound versus the electrical input in watts converted to BTU's to run the system gives a 1BTU in to 6BTU out cogeneration ratio. I hope this clears this up for you

[Ming]

$this->bbcode_second_pass_quote('microwavetire', 'W')e get an average of 1 gallon of oil per tire. The BTU content of the oil at 18000 BTU per pound versus the electrical input in watts converted to BTU's to run the system gives a 1BTU in to 6BTU out cogeneration ratio. I hope this clears this up for you

[microwavetire]

3600 j= 1 watt hour for your conversions. The only references available to oil from microwaving tires are from enviromental waste international, global resource and other researchers in the microwave tire recycling field. Electrical power in watts is given to produce microwave energy, that causes rapid reversals of the molecular structure producing heat by overcoming the cohesion or resistance to breaking the molecular chain, [sulpher carbon, carbon carbon, hydrogen carbon] ETC that make up rubber. some materials like rubber due to it's dialectric constant are disassociated at a molecular level with more efficiency using microwave energy than with standard heating. In this case we are not using electrical power to produce heat directly but to produce microwave power. Sincerely Joe A Pringle Tire Chef Inc.

[smallpoxgirl]

The first question I would have is this: under high intensity microwave radiation, sharp points of metal will tend to generate an electrical arc. Many of us have seen this when trying to reheat Chinese food in the little container with the wire handle. Seems to me the wires in the steel belts would be a perfect arc source and with all that hot rubber would be a huge fire risk.

[UncoveringTruths]

How many used tires are there in the world?

I know within the last 3 years I have discarded a total of 8 in my two car family of four. 8 gallons in three years! This will not scale but it might make the company recycling the tires a little cash.

I also use used tires in my garden and orchard for raised beds.

What use of the used tires is a better use?

[JRP3]

$this->bbcode_second_pass_quote('smallpoxgirl', 'T')he first question I would have is this: under high intensity microwave radiation, sharp points of metal will tend to generate an electrical arc. Many of us have seen this when trying to reheat Chinese food in the little container with the wire handle. Seems to me the wires in the steel belts would be a perfect arc source and with all that hot rubber would be a huge fire risk.

[smallpoxgirl]

$this->bbcode_second_pass_quote('UncoveringTruths', 'I') know within the last 3 years I have discarded a total of 8 in my two car family of four. 8 gallons in three years! This will not scale but it might make the company recycling the tires a little cash.

[microwavetire]

In answer to smallpox girl,concerning wire arcing. We at Tire Chef innovated with tuned fluctuating standing wave ratio technology to prevent or minimize arcing affecting the magnetron. We also employ a system that minimizes the steel's exposure to microwave energy and tunes the cavity or processing chamber. We do not shred, chip or in any way prepare the tire. We place the whole tire in the machine and turn it on. Thank you for the first serious question posted here yet. Sincerely Joe A Pringle Tire Chef Inc.