Chilled Beams

Harvard Business School, Aldrich Hall
Harvard Business School, Aldrich Hall

Active and passive chilled beams, when applied in the appropriate design situation, significantly decreases the required energy of the HVAC system by reducing the fan energy and providing mechanical cooling using significantly higher temperature chilled water. Higher temperature chilled water can be produced more efficiently with a chiller, but additionally can often be produced directly by the cooling tower.

The Harvard Business School, after medications to the curricula, required additional sensible cooling capacity. The existing airside systems were unable to meet this additional load and it was unpractical to modify them. Fan coils and chilled beams were tested in two mock up rooms over the full school year prior to implementing chilled beams throughout. The design for 1 Park Avenue in Dubai uniquely coupled an internally ventilated double skin façade with active chilled beams. This design used a cascading chilled water system that used return chilled water from dedicated outside air systems to supply the chilled beams at a higher water temperature.