There is no advantage to R134A for cooling, so why bother?
The main disadvantage is pressure. In order for R134A to be a liquid, it must be compressed. That is what makes it a refrigerant.
Using this temp-press calculator:
R134a Refrigerant Pressure Temperature Calculator
70F = 71 PSI
140F = 228 PSI
200F = 486 PSI
Imagine the price of components that will required to contain those pressures.