Massachusetts Institute of Technology PDSI

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Some of MIT's buildings within the Main Group, a 1-million-square-foot complex, which also houses one of the worlds largest physics department, were renovated and expanded. The Main Group is the historic center on the MIT campus. A lot of newer buildings were built outside the actual center of the campus and the university tended to be scattered. Therefore the main difficulty was to connect the existing buildings within the Main Group to facilitate the collaboration between different disciplines and bring back the focus to the university's center. Designed by the Boston-located Payette Associates the solution was a new 50,000 square-feet, five-story infill building in the courtyard between the existing facilities. The new building, known as PDSI (Physics Department, Department of Material Sciences and Engineering (DMSE), Spectroscopy and Infrastructure), consists of an atrium, which is surrounded by all sides by the old buildings. The departments are connected through bridges in the atrium, enclosed by a glass canopy overhead. The project also included the renovation of 75,000 square-foot of existing buildings and 217,000 square-foot infrastructure improvements.
The Main Group consists of historic buildings from 1913 - 1937. Due to the architecture conventional air conditioning systems are difficult to incorporate in this buildings. Furthermore quietude was a main requirement for the mechanical equipment. Therefore TROX USA provided active and passive chilled beams for this project because of its quiet and energy-efficient cooling. Passive chilled beams Type TCB were chosen by the design team for low-occupancy spaces such as offices. The beams can be installed flush in the ceiling or can be freely suspended. In addition customized active chilled beams Type DID300 were mounted in the historic Main Group buildings to reduce ductwork and plant room sizes.
Passive chilled beams have no moving parts such as fans, hence they are more silent and reduce operational costs. Due to fans alone the annual energy savings are expected to be around $400,000.
 
The passive beams were mounted freely, hidden under the ceiling panels. TROX USA also provided the chilled beam system for buildings 4, 6 and 8. The DID632 was mounted in the MIT Sloan School of Management and the MIT building E60. Furthermore TROX USA chilled beams Type DID622/621 HC were installed in the David H. Koch Institute for Integrative Cancer Research and Type DID602 in the Lincoln Lab.

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