What happens to the efficiency of a standard fridge if you expand the gas through an energy-recovering air motor instead of letting it heat up through turbulence using an orifice?

Since it can't get items below freezing, it's not useful for home use still.

Is the magnetic system safe for someone with an implanted pacemaker/defibrillator?

The low efficiency of current thermodynamic machines could make good use of heat loss they produce (Joule effect, for exemple), if this loss was harnessed by an cooling system by absortion, still oldest than compression refrigeration system. However, is required a non toxic chemical pair, as is the case of the pair ammonia / water.

I have often wondered where the heat comes from inside a fridge. If you put cold milk inside an insulated box, why should it warm up? Is the heat inside desperate to get in?
I assume the magnets used are electro-magnets. It's a shame you can't use neodymium permanent magnets. No electricity required!

Magnetic emissions? You mean, like, radio? Or is it leaking scary magneto gasses that will give you cancer and a bad hair day? I need to know, my hair is important!

@BobStuart - Your gas escapes.

i emailed them about using the system on a walk in cooler 4' x 4' x 8' tall. their reply was 'we don't make walk in coolers".

Gschneidner and Pecharsky of Ames Laboratory developed gadolinium alloy using commercial grade gadolinium, thus making it commercially viable.

Can somone one measure the magnetic fields of this new fridge and if its high ask factory to treat it to prevent additional magnetic and electric and radio vibrations reaching the consumer.