Smardt Chillers with Danfoss Turbocor Compressors Ride Elevator to Boost Medical Center's Energy Savings
Founded in 1837 and named after the only physician to sign the U.S. Constitution – Benjamin Rush – Rush University Medical Center (RUMC) is now Chicago's second-largest hospital with multi-story buildings that dominate the city's medical district. But that prestigious location posed problems when RUMC's 11-story Professional Building 2 needed to replace two aging centrifugal chillers. It appeared the only alternative was to move a crane down a crowded street to lower new chillers through the roof. But some simple surgery made it possible for Smardt split-shell chillers with Danfoss Turbocor® compressors to simply take an elevator up to the penthouse mechanical room, a solution that cut installation costs while boosting energy savings.
“The professional building was using two fixed-speed 300-ton water-cooled centrifugal chillers,” said Mike Scalleta, Mechanical Systems Manager at RUMC. “They were installed when the building was built in the 1970s. Consequently, the old centrifugal chillers were using twice the energy compared to today's more efficient variable-speed chillers. It was time for them to go. The problem was we'd have to cut open the mechanical room and use a crane to drop in conventional replacement chillers. Fortunately, we learned Smardt had a solution. Their split-shell Smardt chiller design with compact Danfoss Turbocor centrifugal compressors could be taken apart to fit into our freight elevator. Using the elevator would minimize building disruption and reduce installation costs, and the efficiency of a variable-speed Smardt chiller would dramatically cut our energy costs."
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