The Roseville Skating Center is comprised of an indoor arena, the outdoor John Rose OVAL, banquet rooms, and meeting rooms. Built in 1969 on a campus of City of Roseville buildings, the skating center was in need of substantial upgrades to its aging and inefficient infrastructure. Looking for a sustainable solution to replace the outdated systems, the City of Roseville turned to KFI to conduct a facility study and provide options and recommendations for the best path forward. Following the City’s review of the study and option selection, KFI was retained to provide the project design.
Based upon KFI’s recommendation, the City determined the best solution was to convert the ice arena’s direct expansion refrigerant system to a geothermal ground source system; effectively reducing the annual refrigerant use from 7,000 to approximately 100 lbs. The well field is centrally located on the City of Roseville campus and includes 96 boreholes, each of which are 120 feet deep.
The newly installed heat pumps reject heat from the ice. The rejected heat is captured and redistributed through a piping loop to serve other areas of the building. Any remaining unused heat is transferred to the well field and stored, or rejected to the cooling tower. The facility’s new system cools the ice to 18 degrees, warms the seating area to 50 degrees, and the meeting and banquet rooms to 70+ degrees, all within the piping loops. The new system utilizes a small amount of 404A environmentally friendly coolant rather than R22 Freon, which has been phased-out. Indoor skating is a year-round activity at the Roseville Indoor Skating Center so minimal down time was exceptionally important. With that in mind, the mechanical system was converted in just three months.
KFI also provided the design for upgrades to the skating rink itself. For example, the steel piping below the ice was rusting and leaking so it was replaced with five miles of plastic high-density polyethylene fusion welded piping. Following the piping installation, a concrete floor was poured to replace the older style sand floor. New dasher boards and higher glass panels around the rink were also installed for improved safety for both the players and spectators.
The project is part of the City of Roseville’s campus master plan. One of the aspects that made this project so appealing to the City was the ability to integrate the rest of the campus into the geothermal system. The skating center waste heat is now being transferred and used to heat and cool the nearby fire station with a future connection to the City’s vehicle storage and maintenance facility. This innovative solution of implementing an integrated campus system will reduce the overall energy use by 30%, saving the City thousands of dollars a year.
This premier skating center now utilizes a creative, sustainable, and efficient cooling and heating system, with future sustainable capability.
KARGES-FAULCONBRIDGE, INC. ©2012-2018