CAHC/HD Series – Heat of Compression (HOC)

During the regeneration cycle, hot compressed air from the compressor is directed through one adsorber. The heat carried by the compressed air removes moisture from the desiccant, restoring its drying capacity for the next cycle.

The hot compressed air first passes through one adsorber, where its heat regenerates the desiccant. It is then cooled in the aftercooler, and the condensed moisture is removed in the moisture separator. The cooled air finally passes through the second adsorber, where the desiccant adsorbs the remaining water vapour and dry compressed air leaves the unit.

Delair’s CAHC/XD Series is designed for high-capacity industrial compressed air systems, with capacities of up to 17,000 m³/hr (10,000 CFM). It regenerates the desiccant using the heat already present in the compressed air, and the two adsorbers switch over so drying continues without interruption.

Because it regenerates the desiccant using the heat already carried in the compressed air, the CAHC/HD Series needs a hot inlet air temperature of about 145–150 °C, at a working pressure of 6 to 10 kg/cm²(g). Where that hot air is available, the dryer uses little to no external heating for regeneration, making it the most energy-efficient adsorption option.

The CAHC/XD Series regenerates its desiccant using the heat already carried in the compressed air, so it needs hot inlet air of about 145–150 °C, at a working pressure of 6 to 10 kg/cm²(g). It also requires oil-free compressed air, because the hot air contacts the desiccant directly — any oil carryover would foul it. Where these conditions are met, the dryer uses little to no external heating for regeneration, making it the most energy-efficient adsorption option.