Un nouveau rapport démontre le potentiel des poutres froides

Les résultats de ce rapport montrent que la consommation d'énergie des poutres passives et actives était inférieure à celle des systèmes à volume d'air variable (VAV)
A new Technical Fact Sheet EDSL Tas Energy Study published by BCCA has simulated the dynamic thermal performance of four differently sized office buildings, and compared the energy consumption, CO2 emissions and the running costs of different HVAC systems within these office buildings.

The three systems analysed were VAV fan coil units with electronically commutated (EC) motors, passive chilled beams (95% convective/5% radiant) and active chilled beams.

Results showed that for both the passive (17%) and active (22%) beams, energy consumption was lower than that of the VAV fan coil system. Interestingly, the passive chilled beam systems energy consumption was slightly higher than the active beam system.
This was primarily because the passive beams displacement ventilation system requires a higher fresh air supply temperature (to meet occupant comfort) than that of the active chilled beam system.

Even if chilled beam solutions may have higher capital costs than some alternatives, this study illustrates chilled beam technology is also performance led.
Furthermore, with few moving parts, such as motorized fans, on-going maintenance requirements of chilled beams are reduced.