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While I agree on efficiency issues except powered vortexes are more efficient at heating than cooling due to the friction of the air flow, there is such a thing as you asked about. A passive room cooling system was conceived of by the famous designer Buckminster Fuller. He found that by placing...

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Inspection will not solve the underlying problem. First define the problem, is air the problem? Then you have to modify venting of the mold. Problem identification and inspection exist, but the decision must be made and inspecting only tends to support a previous existing opinion. That is why...

Why not put in a couple bottles of Redline's 'water wetter'. If the problem is heat transfer, this will help but if not it will not hurt as it is designed for aluminum radiators and should not corrode your new equipment. Use statistics to track the results, because you can not understand where...

I should not omit this fact: the square of temperature does appear in conductivity equations, in the steady state equation. For an isotropic homogenous body filling region R the triple integral (3D) of the scalar laplacian R times temperature change squared plus conductivity times the triple...

I think what your friend remembered was that forced convection is associated with the square of the surface area to volume ratio, rather than just the surface area. In forced convection, the delta T is much less important than the Reynolds number for turbulance as the mass and flow...

I tried using a cup of water per 2 pounds wax and some cleaning solvent that says it emulsifies wax. It didn't work. It stayed soft for an hour, then got too hard to be considered emulsified. Not very paintable that way.

I was hoping somebody would say just use pure olive oil as it has at least 5% aleic acid and aleic acid emulsifies paraffin if it is less than 5 percent but starts to promote crosslinking if over 4 percent. There is such an item on ebay it is #5551929764. I don't want to spend more than I have...

My good friar: Heat transfer is ANYTHING but easy, considering the history of manipulations and schemes in the coefficient business. I hate to break to news or criticize another web site, but I did follow the link to engineering tools another member gave you , and I am compelled by ethical...

Can anybody tell me what emulsifier to use to emulsify paraffin wax and what process and PH must be maintained? I have a problem with shocking the PH of emulsions I buy making them useless, so I thought I should try to make my own if it is a mixing process. I can buy melted wax locally.

To summarize, Laplace said Power=diffusivity* area * temperature change. Einstein in his Kinetic Theory of Matter said that calories are a measure of heat energy, time to heat being proportional to the capacity of the molecules to contain the heat. Temperature is the 1/2 Mass times velocity...

You have to be real careful with this calculation. The literature starts with Laplace's famous diffusion equation that diffusivity in square meters per second is equal to the quantity conductivity K divided by specific heat (thermitivity c) in joules per kilogram per degree C or K divided by...

This is a classic example of computer/mechanical asthma. The exact solution, and if you are employed as an engineer, you may as well be exact, is not very general and is a complex procedure. So, computers can help. A good model that will get you an easier to communicate about and think with...

I agree all this advice is yoda grade stuff, but I would like to add a practical approach. First define the problem. This is best done if a formal approach is desired in books that discuss 'Quality Planning' or chapter labeled as such. I would guess it is the radius. It is known that such...

I have been poking around for someone to try out a new method of process control that is more process management or design auditing. It combines costs analysis - on the simple assumption that parts over the Upper Tolerance Limit are scrap and those under the Lower tolerance limit can be...

Six sigma is an american misinterpretation of Japanese thinking. Just like the Japanese got calculus right with their version and we got it all wrong and it became useless. Likewise will be the fate of six sigam and their stupid black belt and 'opportunities' and 'yield' nonsense. There isn't an...

Put it on a cheap laptop and send it around. You need a network card to update it when it is in the docking station(s). Otherwise if these departments are on the same site an RS-422 type network using a phone wire and telephone jacks and a small wall mounted terminal could allow some limited...

I have a fuzzy logic program I wrote to use with a laptop and take the professional engineer's oral board exam. It tries to document cost, CPK(centering) and graph the specification in question taking into consideration a mix of variables we use that have different meanings depending on how they...

What would be nice is if AutoCad could do something called 'post' the program to CNC. This would generally be done with ISO G codes, but it still needs to be customized to the machine because every machine does use slightly non standard G codes in different sequences. AutoDesk,the makers of...

That is good news. If you come across any addresses, names, phone numbers, web sites, manufacturing sites or GPS locations, send them along. I'm in the Midwest and the trains don't stop till they get to Canada.