The Qualcomm Q-Addition Cogeneration Plant and Data Center was a design/build project with a very aggressive completion schedule. Design, permitting and construction from contract award to startup were completed in twelve months. The addition also presented some unique engineering challenges due to the importance of keeping the Broad heat recovery chiller fully loaded to meet self generation incentive plan (SGIP) efficiency requirements. Recognizing that the chilled water system temperature splits would not always be at full design, the plant was designed for variable primary flow. An industrial grade instrumentation system senses and controls flows to the various parts of the chiller plant and maximizes use of waste heat.
The Data Center has been designed for maximum reliability with 4MW of standby power in addition to 600 tons of dedicated air cooled chillers and pumping. Transitional cooling during loss and restoration of utility power while the air cooled chillers come up to full operation is provided by pumping from the Campus chilled water distribution piping.
The co-generation system is designed to operate in parallel with the electric utility, as well as in island mode during loss of utility power. Project responsibilities included coordination with SDG&E for both gas and electric services.