Rotary heat exchanger (ER)

The product selection program EXselectPRO permits the choice of different wave heights and widths on the rotor - i.e. variable temperature efficiency ratings.

Choose between four different rotor types:

  • Condensing rotor (standard)
  • Enthalpy rotor
  • Sorption rotor 
  • Coated condensing rotor for corrosive environments

Selection of a non-standard rotor will probably entail a longer delivery time.

Function and application

The rotary heat exchanger permits reduced energy consumption by means of its high temperature efficiency of up to 90 %.

In addition, humidity from the extract air can be transferred to the supply air, thus ensuring optimum air quality in practically all application areas.

Residential buildings

For residential buildings we prefer a crossflow or a counterflow heat exchanger over a rotary heat exchanger in order to avoid the risk of transmitting humidity and odours via the rotor.


Construction

All ER sections are supplied ready-fitted with a drive unit and rotation monitor and are integrated with EXcon control.

However, the rotor control system can also be used in conjunction with other control systems. 

The drive system consists of a belt moving round the periphery of the rotor, while the motor control system ensures variable rotor speed, depending of the heat recovery requirement. The system is controlled only by a 0-10V signal for regulating the motor speed - (for other automatic control, but incl. rotor control). This means that the drive system is not dependent on a particular control system.

The rotor is solidly seated in the frame construction, and minimal leakage is guaranteed by lip and brush seals.

EXcon uses ModBus for rotor control, which comprises:

  • Rotation monitoring with external rotation sensor
  • Alarm Relay
  • De-icing via diffference pressure measuring 
  • Cold recovery
Design options

Wave height:

Options:

  • 1.50 mm (very high efficiency - standard delivery)
  • 1.65  mm (high efficiency)

Rotor depth:

Options:

  • 200 mm (standard)
  • 250 mm (option for higher efficiency)

Rotor types

Choose between four different types:

  • Condensing rotor (standard)
  • Enthalpy rotor (option)
  • Sorption rotor (option)
  • Coated condensing rotor for corrosive environments(option)

Selection of a non-standard rotor will probably entail a longer delivery time.
The rotors can be supplied with an air flushing section, to help minimise the transfer of contaminated air from extract air to supply air. If the flushing function is selected, it will be integrated.

For this it is essential that the static pressure on the supply air side is higher than on the exhaust side.

Dimensions, dimensions table for ER module

ER, heat exchanger section with rotary heat exchanger

Dimensions table

 VEX4000 model Height  Length   Depth
 VEX4010 [mm] 1309 720 1055
 VEX4020 [mm]
1309 720 1275
 VEX4030 [mm] 1499 610 1549
 VEX4040 [mm]
1599 610 1630
 VEX4050 [mm]
1744 610 1755
 VEX4060 [mm]
2069 720 1930
 VEX4070 [mm]
2069 720 2115
 VEX4080 [mm]
2494 720 2325
 VEX4090 [mm]
2744 720 2625
 VEX4100 [mm]
3024 720 2895

The indicated dimensions are the dimensions for the section - EXselectPRO gives the correct dimensions for the whole air handling unit, including assembly fittings and seals.


Add all about the product series Rotary heat exchanger (ER)

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