Ten steam boilers were upgraded at six Advocate sites: Christ Medical Center, Condell Medical Center, Good Samaritan Hospital, Good Shepherd Hospital, Illinois Masonic Medical Center, and Trinity Hospital. Boilers were retrofitted with new burners pre-purchased by Advocate, according to installation specs created by G/BA.
The boilers previously had mechanical linkages controlling the rate of combustion, which limited ability to turn down the firing rate. The new burners are capable of a 10 to 1 turndown, replacing existing burners that, in most cases, were capable of only 4 to 1 at best. The burners use electronic controls in conjunction with VFDs to optimize combustion. The eight largest boilers also incorporate oxygen trim controls. The project has improved reliability at all sites, while maintaining N+1 redundancy. Operational costs were reduced by more than $522,000 a year, and utility incentives totalling nearly $831,000 (from four different utilities) helped fund the capital costs.
|2014 Excellence in Engineering Award, ASHRAE Illinois Chapter.|
|2014 Nicor Gas energySMART program, Impact Award|