Morphing Air Conditioner into Autocascade System

[mytekcontrols]

10 seconds q' can u pls tell me fast i mean u got experience enought for this small 1: applying your last schematic, the above 1, using r11, r22 and r23 and a heat load of ~200watt, what size compressor do i need?

I'll address the part about "what size compressor do i need?" with it all depends on what temperature you require while under a 200 watt load, and of course somewhat dependent on what refrigerants you'll be working with, and how much heat exchange + pressure drop will exist. Let me just say that it gets complicated real fast, if you need a specific answer to that question, and to be quite honest, I'm not the guy with that kind of answer.

Edit: Check out the project described at the very beginning of this thread, it may help to steer you in the right direction with this.

I'm more like the guy that works on cars in his garage, in his spare time. Although he may have done it for years, he is not in the same league as the people that actually designed the engine itself. Sure he can maybe take an engine, re-build it, couple it with a transmission, drive train, perhaps build a frame, and figure out how to get it all to work fairly well together. But bottom line is, he probably does so more by feel, and a bit of luck.

However I do realize unlike some (or many) of you, I also have the luxury of having easy access to a vast array of refrigerants that can be quite expensive, and hard to get on an individual basis. So of course you are going to want to get it right the first time. So that is why with this build, and the one before it, I will show you at least 2 working versions of autocascades. This comes inclusive with everything needed to replicate my results: Compressor specs, Heat Exchanger details, and Refrigerant Charge. The first one which is of the same design as the diagram I just showed you, was designed for a specific application, and is locked into that use. So it can no longer be used by me to test alternative charges. However this second version starting out with 3 cascades, is for my own personal satisfaction, and is not being built for anything specific. Also unlike the first build, this one will be load testable.

If you choose to go off on your own, and build something different, and use a different charge. I wish you great success, and hope that whatever I have shared on this forum will have helped you in some small way. But please do understand that I am not an "expert", and have never, nor will ever claim to be so. I do this strictly for the fun of it, and also to share what I have learned with others.

When it comes to using hydrocarbons in autocascades I am the newbie on this one (other then R170). There are other people on this forum that have a much better feel for this sort of thing, and I think some have showed great results on actual working builds. LukeXE comes to mind, although I forget what refrigerants he has been using. Please tap into these other valuable minds, and don't just take my word for it.

I thank you all for the following acknowledgments (I hope I didn't leave anyone out, sorry if I did)

thx for all the good info's that u put here for us

Yes Mytek we really cannot thank you enough for bringing your expertise here.

Thanks for the drawing, thats exactly how i will build it. Hopefully i won't fail, but who knows, autocascading is a science

mytekcontrols thanks for posting such usefull informations and tips. You explained many things that i had in my mind with simple words. Thanks a lot.

Stay tuned for my progress on my AC2 Project