Tribune Tower, built in 1922-24, is an architectural and historical gem located on Chicago's Magnificent Mile. In 1934, the 32-story building was retrofitted to provide air conditioning. A 600-ton steam jet refrigeration system supplied chilled water to 387 space air-conditioners -- at that time, one of the world's largest air-conditioning installations. In 1948, the steam jet chiller was replaced with two 500-ton electric centrifugals. A third 1,000-ton chiller was added in 1963. G/BA's project entailed replacing these three centrifugal chillers and upgrading the distribution after more than 60 years of service. Cooling energy use was reduced by more than $90,000 in the first year of operation.
|2006 Technology Award, ASHRAE Region VI (first place)|
|2005 Excellence in Engineering Award, ASHRAE Illinois Chapter|