However, Fig. 3 demonstrates the main problem when inte- grating salt-water or glycol solutions, particularly into the evaporator: The subcooling necessary for initiating solidifica- tion, thus the difference between melting and freezing temperature,is typically between 5 °C and 15 °C.For this reason relatively large amounts of nucleate agents, like silver iodine, have to be added to increase the freezing onset temperature,