I am not entirely sure I understand you statments/questions. But on a hunch, let me offer some comments...
If you are trying to 'drive' a condenser, you have to do two things.
1) Have enough heat ejection capacity to keep pace with the 'load' caused by:
a) vapor condensation
b) super-cooling of the condensate before it exits the condenser
c) heat exchange with the surounding environment
2) Deliver accurate temperature control through real-time current adjustment based on sensor feedback from the system.
I like the strategy of using a secondary coolant reservior filled with anything from water at room temp to MeOH/ice at -20deg Celcius to deliver the real heavy lifting and use the Peltier as more of a controling device or when necessary, range booster.
Depending on a Peltier to deliver a 30deg Celcius temp drop is practical, anything greater is most likely going to require multiple stages. And even with multiple stages, going above 45deg Celcius is pretty tough.
This means that a Peltier only system working from Ambient (22 deg Celcius) might get you down to -20 or so. And achieving this will absolutly require a liquid-air heat exchanger. You just can't get enough heat ejection from forced air heat-sink dissipation from a 1.5" x 1.5" surface coupling.
Believe me. I tried, and tried, and tried... and never even got 10% of what I needed. If you arn't willing to back a Peltier with a surface/liquid exchanger, pump and secondary coolant, then you should not bother with the device. It's just took fucking lightweight without it.
TrickE
And on the eight day, God created Meth...
... and hasn't done much of anything usefull since!