Now your starting to get there.
But; back to one of my points..
Is there not MANY easier ways to do this?
If your goal is -40C @ 300W, is it not many times easier to purchase a compressor rated to do just that (plus a little extra), and build a system that does not require extensive subsystems.
Glad you think I'm progressing.
I know that I could get this out of one unit and you're right about that for sure.
It's just that I'm so far ahead on this now, and I have most of the stuff to do it, that It would be better for me to see it through. After all of the reading I've done thus far I've come to realize how important the chosen external components are in a parallel system design. Every piece in the diagram plays an important role in the proper operation of a refrigeration system. From oil regulators to check valves I wouldn't do it any different in a single stage or cascade system either. It's definitely worth the extra money.
Of course in a cascade and other designs there would be more devices such as solenoid valves, expansion valves etc.
The next system I build will start from the evaporator and required load. I won't have equipment like the compressors, so I won't be working in reverse. I'm chalking this one up as experience for future builds. By my next build I may just have it down to a science.
Edited by acdcmike - 2/15/10 at 1:06pm