Heat recovery with recirculating air bypass

Special applications require that the temperature of the exhaust gas respectively the exhaust air after the heat exchanger does not fall below a certain temperature in order to avoid the appearance of aggressive condensates. As to this a recirculating air bypass can be used which mixes heated supply air with the supplied fresh air. The dimensioning and delivery of the complete unit components, such as pipes, fans and filter steps are from one source.

In order to utilize energy of heavily polluted exhaust air at 230°C it is recommended to use a Scheuchl rotary heat exchanger for high temperature applications. Besides the extremely low pressure loss rotary heat exchangers have the advantage that they can be cleaned with compressed air and water. This ensures also after many operating hours an ideal heat transfer. With a rotor diameter of 2.890mm air volumes of 65.500m³/h (20°C) can be treated without any difficulty.