CryoStar Sli and CPU evaporators by Gosmeyer

[[XC] gomeler]

Cannot wait to see these things in action, looking forward to the commercial run

[runmc]

Great work there runmc, what compressor and refrigerant are you using, 15PSI on the low side with only 250PSI high side at 280 watts.

Well done again on some very nice work, all you time and effort has paid of, Good job well done guys.

The compressor is pictured. It is a NF5.5clx (5.5cc Danfoss). It is out of a VapoLS, so you can see the evaporator is operating well.

One last question to go with what refrigerant (and I'm guessing its r507a or r402a with the first more likely), what cap tube length?

I am using refrigerant 402a. I have another evaporator (same design with opposite feed -suction location) that I will be testing with r507.

[Pete]

So can one of these be made to fit the @inatior head kit?

[Roger_D25]

Despite being a noob when it comes to this stuff I have been following thread since beggining and I just wanted to say great job guys I'm glad to see that the desing worked out well, even if it the evap didn't do so well it still would have been a great learning experience (but it's great it did well), lol! Please continue to keep us posted on progress and result!

[runmc]

So can one of these be made to fit the @inatior head kit?

The evaporator size is pre-determined. We can't change it's size. I'm not sure of the design of the kit your speaking. You could possibly mod a kit to fit the evaporator.

[Supertim0r]

for sale soon, Ron ?

[gosmeyer]

Thanks to all you guys for your views and opinions, both pro & con.
I hope if nothing else it says, What If ?
This thing works extremely well on a single stage unit, I couldn’t be more satisfied. The next
evaporator is cascade specific, it’s off the hook.

[johann]

My feeling tell me this evap design will perform better than any stepper/spiral simply because the surface area is where it needs to be, not away from the CPU core. The evaporation and heat exchange happens where its important, not half an inch up from the CPU.

[Unknown_road]

My feeling tell me this evap design will perform better than any stepper/spiral simply because the surface area is where it needs to be, not away from the CPU core. The evaporation and heat exchange happens where its important, not half an inch up from the CPU.

I agree, I've always liked maze evaps over steppers, I'm glad the trend of "stepper is best don't even think of something else" is over

ron: did you have any change to test it out on a cpu? I'm really curious what the core temps will be

[dinos22]

sometimes ideas sound good but are not as promising in practice

it would be nice to see this in actual comparison testing

[Pete]

I think one of these, a @Inator hold down will be a mental combo.

Cool my Penryn nicely when it lands

[runmc]

I agree, I've always liked maze evaps over steppers, I'm glad the trend of "stepper is best don't even think of something else" is over
ron: did you have any change to test it out on a cpu? I'm really curious what the core temps will be

Unfortunately I don't have the cash to get a quad to test with. Maybe someday when the price goes way down. Thanks for you help

sometimes ideas sound good but are not as promising in practice
it would be nice to see this in actual comparison testing

More power to ya - go for it

[Ssilencer]

I agree, I've always liked maze evaps over steppers, I'm glad the trend of "stepper is best don't even think of something else" is over

ron: did you have any change to test it out on a cpu? I'm really curious what the core temps will be

It is not a trend, it is a matter of what you can or can't make and do the best you can, over your machining limitations (at least with us).
Nice performance btw.

[mytekcontrols]

This some very impressive engineering and machining. I think you've definitely set the standard at an xtreme level with this project, and we probably wont see anything better in heat exchange terms for some time to come!!!

BTW what kind of program did you use for creating the image above?

[gosmeyer]

Thanks a lot. Really appreciate that. A lot of people had input on the first design that was made and it all started with Elevens evap as the foundation. They deserve
all the credit for that, all I did was machine it.
Once that showed some promise I decided to push the envelope both in design and machining . I cannot nor will not say it’s the best because I simply don’t know that for sure.
Between compressors – condensers – refrigerant - cap tube length – fans – heat load and evaporators there are too many variables. The up side of that is
it’s going to force me to create a test platform where the only variable is the evaporator. This is a must for my personal satisfaction as well as a good manufacturing
decision .
I do know for sure there are better designs but it comes at a greater cost to the end user because of manufacturing practices. It’s like when they say speed cost money, how fast do you want to go?
The program is just SolidWorks, use that and FloWorks.

[Unseen]

Gosmeyer/Runmc

If you want to try something different try this too


Also made by eleven 12/2004

[runmc]

that is a great design unseen - thank you for all you help - Gosmeyer is very busy with making enclosures and evaporators ATM. We are pulling funds together for a condenser order we need to make. Gosmeyer also ordered some green and blue plastic for enclosures to brighten things up a bit.

[mytekcontrols]

gosmeyer said... it’s going to force me to create a test platform where the only variable is the evaporator

If you're not in too much of a hurry, perhaps I can help with that. I am in the early stages of building a bigger version of my Window Air-Conditioner/Autocascade design. This one will have enough stages to go below -100C at a reasonable load (150-200 watts). It will incorporate a method of disconnecting the cold head, captube, and return line assembly. Essentially it will have a set of cryo-valves and connectors, with an evacuation port which will allow swapping in different cold head/line configurations (with minimal refrigerant loss).

When this project is done, I would be willing to lend it out to you for testing your cold heads.

Please don't ask too many questions about this here, since I will be setting up an independent thread to cover the topic. I just thought it would be suitable for doing the kind of testing you are suggesting.

[runmc]

Eric Gosmeyer milled a few enclosures today for preliminary testing. I imagine final product will be the same. We will add a couple more colors down the road.

[Clemmaster]

Just one question : Have you considered the fact that the inside of the evaporator must be rough (not smooth :p)? How is the base inside the evap? If it's smooth It won't be the must efficient because a tiny layer vapor can separate both liquid and base which involve bad thermal transfert and less vaporization inside the evaporator.

[runmc]

Just one question : Have you considered the fact that the inside of the evaporator must be rough (not smooth :p)? How is the base inside the evap? If it's smooth It won't be the must efficient because a tiny layer vapor can separate both liquid and base which involve bad thermal transfert and less vaporization inside the evaporator.

They are bead blasted my friend I think we mentioned that earlier in the thread

[dinos22]

More power to ya - go for it

go for it??




i was reading a phase change guide the other day and saw a similar design done a while back

This is one of the evaporators made by Baker18, the design of which was later stolen by Asetek for the Vapochill LS. This was an incredible design.

http://www.pclincs.co.uk/Forums/show...5&pagenumber=3




well sort of similar......the OPs one looks a lot more complicated to make

[pythagoras]

Thanks a lot. Really appreciate that. A lot of people had input on the first design that was made and it all started with Elevens evap as the foundation. They deserve
all the credit for that, all I did was machine it.
Once that showed some promise I decided to push the envelope both in design and machining . I cannot nor will not say it’s the best because I simply don’t know that for sure.
Between compressors – condensers – refrigerant - cap tube length – fans – heat load and evaporators there are too many variables. The up side of that is
it’s going to force me to create a test platform where the only variable is the evaporator. This is a must for my personal satisfaction as well as a good manufacturing
decision .
I do know for sure there are better designs but it comes at a greater cost to the end user because of manufacturing practices. It’s like when they say speed cost money, how fast do you want to go?
The program is just SolidWorks, use that and FloWorks.

AH ha, floworks!! Which orientation of flow gave the best results in the theoretical model, captube in the middle or suction in the middle. I did wonder why the design looked very mathematical, not human at all

Regards

John.

[gosmeyer]

AH ha, floworks!! Which orientation of flow gave the best results in the theoretical model, captube in the middle or suction in the middle. I did wonder why the design looked very mathematical, not human at all

Regards

John.

Flip a coin with this particular evaporator. It's too symmetrical to see enough reason for change. It's human, you have to have the model first before you can flo it.

[Starkiller42]

Heh, I would love to see a server farm tackle this with a genetic program.