The new emco circular pipe diffuser system

The new emco circular pipe diffuser system

Reliable calculations thanks to innovative design software

Circular pipe diffusers are always installed as part of an integrated system of different air-ducting components in a circular pipe diffuser system. Because of the wide variety of possible components that can be used in a circular pipe of this kind (elbow joints, bends, branches and so on) together with the high variability of circular pipe diffusers in terms of nominal diameter, and number and length of slot channels, the hydronic balance of a circular pipe diffuser system is very complex and requires substantial expert knowledge.

In addition to this, aesthetic considerations often mean that both a constant pipe diameter and a constant number of slot channels are required throughout the pipe diffuser system. As a result, it is not possible to achieve a hydronic balance simply by introducing reductions or varying the number of slot channels in the diffusers.

This means that it is necessary to use pre-defined fixed resistors in the circular pipe diffuser system to control the pressure ratios in the section, without affecting the section’s uniform appearance. The calculation specifies the type and position of pre-defined fixed resistors in the circular pipe diffuser system to ensures its hydronic balance. The software also calculates the specific outlet volume flow for each separate diffuser in the system and produces further technical data for the circular pipe diffuser system. 

Pressure losses and sound power levels are produced, as well as a schematic drawing and a quantity structure for the section. This ensures that our customers already have access to robust technical data on the emco circular pipe diffuser systems they want in the initial planning phase.

The circular pipe diffuser system as a design element

Circular pipe diffuser systems are ideally suited to being used in visible areas, where you want to avoid using rectangular ducts for aesthetic reasons. A significant feature of circular pipe diffuser systems is their uniform appearance thanks to their constant pipe diameter and the constant number of slots in the diffusers. To avoid spoiling the uniform appearance of these circular pipe diffuser systems, any volume flow controllers and sound absorbers required are often designed to be located out of sight or even outside the area for which the air conditioning is intended. However, architectural constraints often mean there is no room to separate these components from the circular piping.

So that the uniform appearance is still not interrupted in these cases, emco offers special volume flow controllers and sound absorbers that match the diameter of the circular pipe diffuser systems and can be seamlessly incorporated into the piping. Naturally, emco makes sure right from the design stage that all the necessary comfort specifications, such as outlet volume flows and sound power levels are complied with according to the customer’s requirements.

The circular pipe diffuser system as a design element

The RRA-V

If both the heating mode and the cooling mode from greater heights have to be accomplished with a pipe diffsuer system, electrically adjustable pipe diffsuers type RRA-V can be used. These diffusers have a motorized adjustable damper that opens or closes the corresponding preset eccentric rollers, depending on the cooling or heating mode. This allows two predefined beam shapes, which are adapted according to the space situation and the thermal loads. If you want to bypass manual intervention during the changeover between heating and cooling operation entirely,the system of motorized adjustable diffusers type RRA-V can be extended by the emcoMFR temperature difference control (TDR).

The temperature difference control emcoMFR-TDR is used to drive electric-motor-adjustable diffusers as a function of the temperature difference between the supply and room air. The controller operates independently and does not need to be monitored. By constantly monitoring the supply and room air temperature, the eccentric rollers of the circular duct diffsuers for the heating or cooling mode are automatically opened or closed. By default, the emcoMFR-TDR has two different setpoint curves programmed at the factory in accordance with the to be driven diffuser, the motor type and the planning specifications. Basically (0-10V DC) up to 10 servomotors can be connected parallel to each output of the emcoMFR-TDR. Up to 10 RRA-V diffusers can be automatically controlled simultaneously with one emcoMFR-TDR.

The RRA-V