Liquid Cooling Packages System. Liquid Cooling Package LCP Rack CW, LCP Rack CWG. Cooling via high-performance compact impellers. The LCP draws in the air at the sides at the rear of the server enclosures and blows the cooled air back into the front part of the server enclosure at the sides. Liquid cooling works very much like a radiator in your car or home. These systems circulate liquid through “water blocks” which rest on top of the chip that is being cooled. The relatively cooler liquid circulating through the water block pools the heat away from the chip, cooling it.