The high moisture absorption capacity and low cost of the lithium bromide-treated water offers a clear advantage over competing cooling strategies using hydrogels and metal-organic frameworks. Those systems require time-consuming regeneration rates and require active replenishment of water supplies.
Wu, in his paper, said the device “can spontaneously and quickly recover its cooling capacity by absorbing water vapor from the air during off hours.”
So, also time consuming and would likely require active replenishment. Got ya.