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Project Delivery Method: Design-bid-build (DBB)
Owner Team: Pharmaceutical building manager, owner representative consultant, facility manager (in-house staff), and third-party commissioning (Cx) agent
Project Delivery Team: HVAC consulting firm's project manager and design engineer; electrical, plumbing, and structural engineer consultants; and the utility company representative
HVAC Project Delivery Team: The HVAC contractor was awarded the project based on the contract document bid as well as the "best value" in lieu of the lowest bid. Other team members include the DBB HVAC job superintendent, supervisor, automatic temperature control (ATC) subcontractor, and the rigging subcontractor
2019 ASHRAE Handbook HVAC Application: Commercial & Public Buildings, Chapter 3; and Industrial AirConditioning, Chapter 15
2020 ASHRAE Handbook HVAC Systems and Equipment: Condenser Water Systems, Chapter 14; and Cooling Towers, Chapter 40
Project Type: Infrastructure (central process cooling and HVAC chilled water system cooling) and facility differed maintenance master plan implementation
References: 2019 ASHRAE Handbook, HVAC Applications; and 2020 ASHRAE Handbook, HVAC Systems and Equipment
Other References: Cooling Technology Institute (cooling towers); ASHRAE Guideline 22, Instrumentation for Monitoring Central Chilled Water Plant Efficiency; ASHRAE Fundamentals of Design and Control of Central ChilledWater Plants; ASHRAE Standard 202, Commissioning Process for Buildings and Systems; and Facility Condition Index (FCI) - a standard facility condition benchmark
DESIGN INTENT DOCUMENT (DID)
The HVAC system selection and design intent are based on the process outlined in ASHRAE Handbook 2020, Chapter 1, HVAC System Analysis and Selection, and included FCI financial evaluation by the company's asset master plan to repair rather than replace the two 800-ton cooling towers serving the pharmaceutical company's condenser water system. The existing towers were in poor operating condition, unreliable, and expensive to operate.
A DBB firm, which also serves as the pharmaceutical facility's mechanical service company contractor, was chosen as the best value prime contractor for the job.
Existing equipment to remain as part of the condenser water system includes the plate and frame heat exchangers and split-case pumps with standby pumps, each with variable frequency drives (VFDs). Automatic controls shall include new controls, a BACnet interface, and an internet interface with an existing building automation system (BAS) interface.
The infrastructure program and project goals shall include energy performance goals and budget goals, i.e., first cost, operating cost, life cycle cost, and return...