Custom machined Waterblocks (Pics)

[ionbasa]

Figure you guys might enjoy some custom waterblcoks machined out on a 3 axis CNC mill (HAAS).

Its for a project I'm working on.

 

This first set was a prototype that I wasn't entirely happy with. Surface needs to be lapped and cleaned up. Had to use fly cutter due to some constraints, which is why the contacting surface looks the way it does in the last photo (any why lapping needs to be done).

Specs:
Aluminum 5052

Yes, EK fittings

 

 

 

[tikker]

Looking slick. I'm curious as to their performance.

[SolarNova]

The lack of a groove for a o-ring indicates to me you might be considering braising or otherwise 'sealing' these ?

 

Large channels instead of microfins also ...sub ambient loop perhaps ..maybe subzero ?

[ionbasa]

9 hours ago, SolarNova said:

The lack of a groove for a o-ring indicates to me you might be considering braising or otherwise 'sealing' these ?

 

Large channels instead of microfins also ...sub ambient loop perhaps ..maybe subzero ?

There are other methods than 'o-rings' that can be used to create seals. This prototype specifically uses flat gaskets.

As to microfins: There are issues with pressure drop and flow rate. This needs to have a relatively low pressure drop and high flow rate in L/min. So, larger channels. The serpentine also help control fluid velocity before hitting the fins at the top. The taper before the fins ensures even pressure distribution across the fins.

Sub ambient and sub zero is actually what is specked for. A chiller will be used for this, its for a cooling some power electronics and HV DC sources.

 

 

9 hours ago, tikker said:

Looking slick. I'm curious as to their performance.

Have simulations in hand for fluid + heat transfer. They perform well. Running though full testing this month.

[Christophe Corazza]

14 hours ago, ionbasa said:

Have simulations in hand for fluid + heat transfer. They perform well.

 

Looks very nice indeed! Do you have any CFD results that you can show? :-D