Not sure if this helps but I race snowmobiles on an asphalt track in the summer, So I built a small cooler that consists of an ATV radiator and a high performance electric fan(for drag cars) and a reservoir (20 gallon Igloo cooler) The fan is mounted to the radiator and blows through to cool off the coolant being pumped through inside. A small pump circulates the coolant and fills the snowmobile via quick connect fittings installed in the snowmobiles cooling lines. This is done after every run down the track as Snowmobiles dont have radiators they have Heat exchangers that are usually sprayed with snow under the track of the machine. After a run my coolant can be near 190f . Most of the time when I change out the coolant it is near or lower than the air temp that its in.

I also use a product called WATTER WETTER which acts as a wetting agent allowing the fluid to cool much faster than if it were plain old water. You can get this at any automotive store by the additives. Just add a few oz per gallon of coolant. It works miracles

Sorry for the banter but thats what I know about cooling outside of buying a water chiller which can cost a pretty penny.