Tesla Turbine - MK4

Feb 2022 - In production


UPDATE 4th of Jan 2022

Production has started. We ARE NOT accepting orders or backorders just yet. This product page will be updated with more information soon.

Feel free to email us with questions.
Our first Tesla Turbine was made in 2005, this is our 4th Tesla Turbine which has been designed with customer feedback and experience making the previous turbines. You requested improved efficiency, increased power and perfect sealing out of the box. This turbine can handle more extreme environments, pressures, temperatures and it can handle steam with ease. No brass comes in to contact with the medium and its aluminium and stainless steel construction is ideal if you are experimenting with ammonia gas.

Strong Design
The design from the beginning focused on a strong casing that could handle extreme pressures and temperatures. The main casing has a computed failure of around 75bar (1080psi) at room temperature. It has a working pressure (max pressure) of 15bar at room temperature. Working steam pressure has been calculated at 15bar @250C,this will be verified with further testing in the near future (worst case we will fall back for 10 bar for steam).

Viton O-rings have been used for sealing at 4 points (inlet nozzle, the 2 casing halves, shaft cap and outlet port). Viton seals can handle 200C(400F) continuously and can handle 300C(600F) for up to 48 hours).

Magnetically coupled shaft
The shaft no longer needs to be sealed. We have fitted a magnetic coupling giving a perfect shaft seal. Eddy currents will impact efficiency slightly but good seals had similar issues with friction previously.

Labyrinth seal
We have designed in an experimental labyrinth seal with this turbine (Tesla did this in later designs). It is important to note the Labyrinth seal is just to improve efficiency and won’t cause leaks. You could actually remove it without the turbine leaking. This is just to stop the gas/liquid following straight to the outlet. The Labyrinth seal is changeable and upgradable. We will open source the part so people can amend and improve. Should be very interesting for those with 3D printers.

Standardise inlet
A ½ BSP inlet thread was carefully chosen. This is commonly fitting used in the UK, All of Europe, Australia, New Zealand and South Africa. It is not used in USA or Canada. However ½ BSP fittings happens to be almost identical to ½ NPT/NPS (pitch same, angle slightly different). Hence compatible with a little extra PTFE. The outlet is a much large 1 and ½ BSP fitting designed for unrestricted outlet. This part is changeable and a hobbyist with a lathe could easily make different outlets. The outlet is also removable giving a simple outlet.

Key points
  • Increase power (output to be verified Kw range)
  • Greater surface area hence for greater boundary layer effect
  • Designed for increase efficiency
  • 35x more throughput
  • Can handle for higher pressures 300psi+ with air
  • Can handle for higher pressures 150psi+ with steam
  • Good safety factor built into design
  • Better coupling to generator design
  • Suitable for close-loop applications
  • Casing seals included
  • Standard plumbing fittings for inlet/outlet
  • Closer to Tesla's original design
  • Can be used with compress air, steam, water or many other types of gasses
  • Temperatures up to 250C with supplied seals.
  • Hybrid ceramic bearings
  • 168mm / 6.6 inch disks
  • S304 Stainless steel disks, shaft and spacers
  • 1/2 inch BSP inlet
  • 1 1/2 inch BSP outlet
  • Experimental Labyrinth seal to improve performance
  • Labyrinth seal replaceable
  • Nozzle replaceable
  • CAD design of nozzle and Labyrinth downloadable for tinkering
  • Does lead itself to 3D printed test projects

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Price: £600.00 in

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