RNR/ Exal manufactures some of the largest Refrigerated Air/Gas Dryers globally for Compressed Air / Gas. Compressed Air/Gas enters the dryer through a Gas to Gas heat exchanger. The incoming Gas/ Air is pre-cooled using the outgoing dry Gas/ Air. This economizer heat exchanger can enable a reduction in cooling heat-load 10- 40% or more depending on the working pressure and compressor discharge temperature etc.

The pre-cooled Gas / Air then is cooled in an evaporator by direct refrigerant expansion. In the process of cooling, the moisture in the Gas / Air condenses. The pressure dewpoint achieved is around 3^oC (at pressure dewpoints less than 3^oC moisture starts forming ice and can lead to heat exchanger failure even under high pressure.)

RNR/ Exal refrigerated dryers can be designed for blowers and compressors. This includes working pressure as low as 0.5 Bar(g) and up to 70 Bar(g).

All our systems are designed based on proper heat load calculations coupled with simulation based evaluation of each heat exchanger to determine pressure drop and heat transfer area effectiveness. For the heat-load we take into account the Kg/Hour of Compressed Gas/ Air and Moisture entering the system. In addition, we consider the moisture quantity at the inlet of dryer based on compressor inter-stages, compressor suction etc. The cooling required to condense the moisture to the desired dewpoint is based on the evaporator heat-load and the pre-cooler effectiveness.

RNR / Exal has the lowest committed and delivered pressure drops in the industry. Our systems have been designed for very low-pressure applications such as use with blowers where working pressure is 0.5 Bar(g) and pressure drop is critical.

RNR / Exal has the lowest committed and delivered pressure drops in the industry. Our systems have been designed for very low-pressure applications such as use with blowers where working pressure is 0.5 Bar(g) and pressure drop is critical.