Tuesday Tech Talk!


Insulation efficiency, that’s where this iStill Blog post is about!

Insulation efficiency

We love our iStills to be ultra efficient, because it directly relates to higher output figures, more control and lower variable costs per liter. Insulation plays an important role in achieving top notch efficiency.

Here are some numbers to baffle you on how well insulated our designs are (examples made after heating the units to 70 degrees C and then turning them off completely):

– The iStill 5000 NextGen loses only 0.3 degrees C per hour;

– The iStill 2000 NextGen loses only 0.5 degrees C per hour;

– The iStill 500 NextGen loses only 0.8 degrees C per hour;

– The iStill 100 NextGen only loses 1.2 degrees C per hour.

The differences between the units stem from bigger units holding bigger amounts of liquids, which – by shear volume – acts as an insulator.

Real world example

We got contacted by a Craft Distiller using a 20 plate copper fruit brandy design still that was build in the south of Germany. His unit has 2000 liter capacity and this allows him to make around 220 bottles of vodka in one go. The unit runs on Liquid Propane Gas (LPG). His variable  energy input costs of heating up and running his rig, in order to produce those 220 bottles per run, were EUR 650,-. That translates to a staggering EUR 3,- of variable costs (without even counting cooling water!) per bottle.

He contacted us, because he wanted to know if the iStill 2000 NextGen could do a better job. We did the math, and – yes! – we can! Here we go:

  • The iStill 2000 NextGen uses a little less than 300 kWh per run;
  • The price of one kWh is (depending on your location) around EUR 0,16;
  • Total variable costs of a run with the iStill 2000 NextGen are EUR 48,- instead of EUR 650,-;
  • Variable energy input costs per bottle (say we make 220 bottles as well): EUR 0,22 instead of EUR 3,-!

The Craft Distiller could buy the iStill 2000 NextGen and earn back his investment in a EUR 40.000,- unit in under 70 runs!

Of course the gains in efficiency are not only caused by our insulation. Our 21st century technology, automation, and robotization play a huge role as well. But that does not make the example less amazing.



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