2020 CANADIAN CONSULTING ENGINEERING AWARDS
Jim Pattison Children’s Hospital any loss of capacity. The system was designed to be able to absorb multiple simultaneous failures, as well as convert to a 100% fresh air ‘pandemic mode’ when needed—a feature that was called upon shortly after opening the doors.
Photos courtesy Daniels Wingerak Engineering
BUILDINGS
AWARD OF EXCELLENCE
Daniels Wingerak Engineering
“Pandemic mode is impressive with 100% fresh air—and incredible timing!” –Jury 28
www.canadianconsultingengineer.com
CCE_OctNov2020_AMS.indd 28
Saskatchewan was one of the few provinces in Canada without a dedicated children’s hospital, but this is no longer the case. Following decades of planning, the Jim Pattison Children’s Hospital opened in 2019 in Saskatoon. Daniels Wingerak Engineering served as mechanical engineer for the project. The systems serving the 176bed hospital needed to meet stringent safety standards while being mindful of energy impact. In particular, much care was taken in the design of seven Haakon custom central station air handling units, with external and internal redundancies to allow for maintenance without
Critical systems Filtration at the air handlers is critical. For efficiency while reducing pressure drop, innovative Dynamic V8 filters were selected for their long service life (five years) to reduce maintenance, while still providing MERV 15 levels of filtration, at the lowest pressure drop of any filter to reduce energy consumption for continuously operated equipment. The primary filters are backed up by a carbon matrix grid filter to further reduce incoming volatile organic compounds (VOCs). One major challenge was the cancellation of a new central heating, cooling and generator plant for both the new hospital and an existing, adjacent hospital. This left the completed mechanical design without a source of heating or cooling. The basement mechanical room was able to absorb the addition of a redundant steam supply, along with flooded vertical heat exchangers, but there was no space in the new hospital for a chiller plant and cooling towers. Instead, space was found in the existing hospital for new chillers, which were then integrated with the existing plant, whose cooling towers were replaced with larger, shared, redundant fluid coolers. Heating for the air system is entirely supplied though a Konvekta highpressure run-around heat recovery system. This allows for 90% heat recovery from all of the building’s exhaust streams and process heat (from server and electrical rooms), with 0% crosscontamination. Recovery is so high, no additional heat is required to tem-
October/November 2020
2020-10-05 9:16 AM
