Eco-Rac^® (Heat Recovery System with No Cross-contamination)

Eco-Rac^® is a heat recovery system that completely separates exhaust gases from air supply. It is ideal for energy saving in such sectors as semiconductor and medicinal chemical industries, and animal experimental laboratories.

Eco-Rac^® is a run-around wet coil heat recovery system. It evenly sprays water over either exhaust gas or outside air coils, depending on which has the lower enthalpy, beginning with wetting the upper part of the coil it thus achieves the greatest heat exchange using the latent heat of vaporizing water. This provides a more efficient heat exchange and a great energy-saving effect, enabling the initial investments to be recovered in four or five years.

Adopting the run-around method, this system has separate coils with a fan, one for exhaust gases and the other for outside air. In between them water (brine) is circulated as a coolant, fully preventing any exhaust gas from getting mixed in to the air supply. Additionally, each time the operating mode is switched, sprayed water in the A and B units is completely blown off and the water in the tank is replaced with a new water, preventing water sprays from introducing any cross-contamination.

The exhaust and outside air intake units can be installed at separate locations.
The heat exchange in the Eco-Rac^® system occurs in piping containing a heat medium, allowing the A and B units to be laid out as desired. In other words, the outside-air intake can be installed away from the exhaust port for providing a better quality of supply air and the layout and ductwork in the machine room are not constrained by their installation.
In addition, whether indoor or outdoor, the system requires only a small space for installation.

Eco-Rac^® enables CO2 emissions with outside air loads to be reduced annually by about 25%. (Estimation on the Tokyo region)

Including exhaust gas from a low-temperature room, the system can recover heat from exhaust gases with a wide range of temperature from -20°C to +80°C.