Entry # 35
Rocky Point Engineering
Brief overview of the project
Boiler plant upgrade for a large secondary school in Surrey, BC. We replaced one of two ineffecient boilers with six new, rack-mounted, condensing IBC Boilers and tied in the remaining ineffecient boiler to provide an injection of high temperature water when needed.
A Caleffi hydraulic separator (low-loss header) was used. Due to the multiple heating zones of the school, staging of the new boilers and existing boiler - this system - provided an excellent opportunity for the Caleffi hydraulic separator to ensure the fluctuating flows and temperatures on either side of the hydraulic separator.
Variable speed secondary pumping was also provided which was controlled by differential pressures of each heating water zone.
The design goal was to replace an inefficient boiler plant nearing the end of its serviceable life with a new, reliable and efficient hybird boiler plant utilizing six new boilers and one existing boiler.
Yes, challenges included dealing with multiple zones and an older design with coils, rads, etc. designed for high temperature / low temperature systems. The original pump flows to each zone varied due to different heating requirements. The Caleffi hydraulic separator ensures the needed flows between the primary and secondary loops.
The system is preforming very well, is reliable and easy to maintain.