Hydronic Cooling Systems?

The majority of homes in NM have evaporative cooling (swamp coolers). Just wondering if anyone has any information on hydronic air conditioning units, since my swamp cooler will need replacing soon, and I would prefer the hydronic to typical refrigerated air conditioning units (water conservation and costs out west). I've already researched some hydronic heating systems, and like what I've found: no maintenance required; they can be hardwired such as typical baseboard types or can be portable; they have sealed lines inside that contain a solution that heats up, then the thermostat shuts off the unit and maintains the heat for a while after that.

Sandy in NM