hey im planning of using my 12k btu portable ac to cool water/glykol mix but the minimum temp is only -25C and im not happy with it i want louer temps can i pinch the captube to louer the temps or will it FUUUU up everything specs is under

cooling capacity 12000btu/h
suction pressure 1.2mpa
discharge pressure 2.8 mpa

and how the hell am i going to get a cool box in that?????

help will be aprisiated