Tankless Water Heater Scaling etc. [RE-wrenches]

[Dean T. Newberry]

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Hi y'All
Water Quality Association on elecro magnetic descalers.

The WQA has long maintained that all product performance and benefit 
claims for all products that purportedly alter the hardness 
characteristics of water be based on factual date obtained from tests 
conducted by professionally competent personnel following established 
test procedures. Such data should be recent, reputable, and verifiable, 
and should substantiate all product performance and benefit claims. The 
WQA claims they know of no generally recognized scientific or technical 
evidence which proves that magnetic, electromagnetic, or catalytic 
devises sold to treat water have any measurable physical or chemical 
effect on water quality.

Maybe there is something to GT's voodoo claim.
I think there is agreement on professionally competent, established test 
procedures, and scientific evidence between the WQA and GT's point of view.
There appears to be substantial anecdotal support for the products, and 
significant use in the field. I don't know if the science like 
explanation of the conversion of calcium chloride to aragonite has any 
validity.

 Here's another attempt at a scientific explanation.

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Perhaps the most remarkable observation is that devices can affect 
descaling downstream of the point of installation; a softening and 
loosening of existing scale several weeks after installation is commonly 
reported.
To understand the mechanism, some knowledge of mineral scale 
precipitation is necessary.
We know that in order to form a scale deposit three conditions must be 
met: - The solution must be supersaturated.
- Nucleation sites must be available at the pipe surface.
- Contact / residence time must be adequate.
To prevent scale it is necessary to remove at least one of these 
pre-conditions.
Clearly contact time is not an alterable factor.
To be effective any device must therefore affect either the 
supersaturation value or the nucleation process.
The direct effect of electronic devices is on the nucleation process and 
in particular to enhance initial nucleation through the creation of new 
nucleation sites within the bulk fluid flow.
Crystal growth then occurs at these points of nucleation and not at the 
pipewall.
Suspended solids increase with a corresponding drop in the level of 
supersaturation, and these effects have been observed in the field.
The localised pH increase near the pipewall caused by hydroxyl radicals 
formed by electromechanical interactions is one mechanism that drives 
the changed nucleation characteristics.
A Lorenz force (F) is experienced by charged particles that flow through 
a field: F = qE + q (V x B) where q is the charge on the particle, E is 
the electric field vector, V is the particle velocity, and B the 
magnetic field vector.
Electronic devices operate at very small residual magnetic fields 
whereas magnets need high field strength (>1000gauss) for optimum 
performance.
The flow dependency of magnetic devices is explained by the velocity 
parameter, V, and E=0.
The flow non-dependency of electronic devices is explained by the fact 
that the magnetic component approaches zero, but the electric component 
is essentially constant.
This suggests that the key performance parameter is the total value of 
the 'Lorenz' force acting on the charged particles, rather than the 
individual magnetic and electric field vectors.
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That sounds real scientific, but it is from the The patented 
Scalewatcher-Enigma Electronic Scale Control System post on Engineering 
Talk Website not from a university.

cul deant

Tom Lane, Energy Conservation Services wrote:

>
> Magnets cannot have any effect on water- it violates all the laws of 
> physics there is no scientific evidence and no credible chemist or 
> physicist who gives any credence to this voodoo- my apologies to all  
> witch doctors gator tom

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