Masonry Magazine June 1978 Page. 13
Continental Bank "Reinvests"
Continental Bank is "reinvesting" the heat generated by computer equipment at its new building at 840 S. Canal St. in Chicago by recycling it to heat other areas of the building. The result: a super-sophisticated energy system which conserves fuel and saves the bank money. In simplified terms, the system works this way:
The heat generated by the operation of computers in the building rises and is captured by return air grilles in the ceilings. The heated air is carried by ducts to cooling coils. As the air passes over these coils, its heat is conducted to water inside the coils.
This heated water is piped from the coils to chillers where the heat, instead of being dissipated through cooling towers into the open air and lost, is transferred to a heat exchanger, through which the heat is passed to water used in the building's heating system. The heated water runs through the building's heating fan coils. Fans blowing air across these coils circulate the heat into the building work spaces.
Energy is also being conserved in the building's two-story atrium area. Needs for heat and air conditioning in the atrium were reduced by more than one-half through the use of special glass in the atrium skylight. Alternate layers of clear, opaque, and tinted glass panes greatly reduce the escape of heat in winter, and prevent the atrium from becoming overheated by the sun in summer.
To conserve electric power, a control panel in the building's security center is equipped with switches that can turn off unnecessary lighting on any floor in the building.
The former Chicago warehouse (top) was transformed into Continental Bank's new operations building (bottom) during a three-year renovation that included the complete refacing of the exterior with new brick. In an unusual procedure, construction progressed floor-by-floor from the top down to minimize interference with bank operations which continued during the work. W. E. O'Neil Construction Co. was the general contractor and V. S. Wallgren Co. the mason contractor. Both firms are headquartered in Chicago. (A full report on this project was carried in the September, 1977 issue of "Masonry.")
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