Converting from primary/ secondary pumping to variable primary pumping is a common approach in chilled water plant renovations. For ANW Hospital, the solution to implement a hybridized system – leaving existing primary pumps at constant speed while converting secondary pumps to variable speed rivals of the performance of using a combination of variable speed primary and secondary pumps. This presentation focuses on how the system was modeled and the performance and operation.
Brendan Huss and Joe Witchger, HGA Architects and Engineers