Desiccative Evaporative Cooling (DEC)

Desiccative evaporative cooling (DEC) is an open sorption cooling process. The main application is in air conditioning. In German, this process is often referred to as sorption-supported air conditioning (in german: sorptionsgestützte Klimatisierung or SGK). The refrigerant is the air that is to be cooled. The cooling of the incoming air is based on a sorptive drying of the air with subsequent evaporative cooling. The drying process can occur with solid or liquid sorbents. For example, in solid sorption a sorption wheel may be used for drying the incoming air. Evaporation cooling results from the subsequent humidification of the incoming air. Silica gel, lithium chloride or zeolite is used as the desiccant. The regeneration of the desiccant occurs in the temperature range between 50°C to 95°C. [3] 


[3]: Henning Hans-Martin, Urbaneck Thorsten, Morgenstern Alexander, Nunez Thomas, Wiemken, Edo, Thümmler, Egbert, Uhlig, Ulf (2015) Kühlen und Klimatisieren mit Wärme. Bine-Fachbuch.