Project Delivery Method: Design-bid-build (DBB)
Owner Team: Financial office building manager, owner’s 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 and electrical, plumbing, and structural engineer consultants
HVAC Project Delivery Team: HVAC contractor (prime contractor) awarded the project based on contract document bid. Other team members are the DBB HVAC job superintendent; mechanical-electrical coordinator; cooling tower manufacturer technician; rigging subcontractor; plumbing and electrical subcontractors; and subcontractor testing, adjusting, and balancing (TAB) technician.
2019 ASHRAE Handbook HVAC Application: Commercial and Public Buildings, Chapter 3, and Data Center and Telecommunication Facilities, Chapter 20
2020 ASHRAE Handbook HVAC Systems and Equipment: Condenser Water Systems, Chapter 14, and Cooling Towers, Chapter 40
Project Type: Infrastructure (central process cooling condenser water system cooling) and facility deferred maintenance master plan implementation
References: 2019 ASHRAE Handbook — HVAC Applications, 2020 ASHRAE Handbook — HVAC Systems and Equipment, and the codes and standards located at the end of each ASHRAE Handbook for additional reference
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 Chilled-Water Plants; ASHRAE Standard 202 (Commissioning Process for Buildings and Systems), and Facility Condition Index (a standard facility condition benchmark)
DESIGN INTENT DOCUMENT (DID)
HVAC Design Intent:
- The HVAC system selection and design intent is based on the processed outlined in ASHRAE Handbook 2020, Chapter 1, HVAC System Analysis and Selection, and include the following:
- Owner building program goals and additional goals.
- System constraints and constructability constraints.
- The finalized system selection shall consist of a replacement cooling tower and standby cooling tower to serve financial data center.
- Specialized systems shall include an existing plate and frame waterside heat exchanger located in the central chiller plant.
- Automatic controls shall include temperature controls, furnished controls, BACnet interface, internet interface, existing building automation system (BAS) interface, and existing computerized maintenance management software (CMMS) system interface.
- Program and Project Goals:
- Functional goals: (refer to Chapter 1, 2020 Handbook).
- Budget goals: first cost.
- Timeline goal(s): four-month construction period.
- Management goals: property management and in-house mechanical and electrical services and outside service contract for cooling towers and chemical treatment.
- Available Utilities:
- Electrical power, emergency power, central plant condenser process water system.
- Existing waterside economizer system.
DESIGN CRITERIA DOCUMENT
- The HVAC design criteria shall be in sync with the project delivery method and owner’s project requirements.
- A construction phased cooling tower and standby tower replacement schedule based on the facility’s deferred maintenance replacement plan.
- The existing cooling towers shall remain in operation until the change-over to the new cooling tower installation.
- Rebalancing of the condenser water system for condenser water flow, standby flow, and waterside economizer flow sequences.
- The design team shall provide contract drawings and specifications coordinated with equipment weight; electric data, including the emergency power requirements and plumbing criteria, to solicit general contractor bids.
- Field fabrication drawings shall become the record drawings at closeout.
- New cooling tower units shall be furnished with operation and maintenance (O&M) manuals.
- The equipment manufacturer’s preventive maintenance work orders shall be uploaded to the existing O&M staff’s computerized maintenance management software (CMMS) system.
- The D-B-B contractor shall provide system training to the building’s O&M staff regarding the cooling towers and the 24/7, year-round condenser water system and electrical normal and emergency power systems.
Project Delivery Method
[ ] Design-Build (D-B)
[ ] Construction Management @ Risk (CM) with Guaranteed Maximum Price (GMP)
[ ] Design-Bid-Build (D-B-B)
[ ] Commercial Property Management Owner
[ ] Owner’s Representative (consultant)
[ ] Project Manager of Capital Projects
[ ] Facility Manager (in-house staff)
[ ] Third-Party Commissioning Consultant (CxC)
Project Delivery Team
[ ] D-B Project Manager
[ ] D-B-B Consultant Project Manager
[ ] Job Superintendent
[ ] Electrical, Plumbing, and Structural Engineer Consultants
HVAC Project Delivery Team
[ ] HVAC Job Supervisor
[ ] HVAC Job Superintendent
[ ] Cooling Tower Manufacturer Technician
[ ] O&M Technician (outsource staff)
[ ] Testing, Adjusting, and Balancing (TAB) Technician
Application 2019 ASHRAE Handbook
[ ] Commercial and Public Buildings, Chapter 3
[ ] Places of Assembly, Chapter 5
[ ] Industrial Facilities, Chapter 15
[ ] Data Centers and Telecommunication Facilities, Chapter 20
Systems 2020 ASHRAE Handbook
[ ] HVAC System Analysis and Selection
[ ] Air-Handling and Distribution, Chapter 4
[ ] In-Room Terminal Systems, Chapter 5
[ ] Condenser Water Systems, Chapter 14
[ ] New Construction
[ ] Renovation
[ ] Shell & Core
[ ] Tenant Fit-Out
[ ] Infrastructure
[ ] 2017 ASHRAE Handbook – Fundamentals
[ ] 2018 ASHRAE Handbook – Refrigeration
[ ] 2019 ASHRAE Handbook – HVAC Applications
[ ] 2020 ASHRAE Handbook – HVAC Systems and Equipment
[ ] ASHRAE Guideline 22, Instrumentation for Monitoring Central Chilled Water Plant Efficiency
[ ] ASHRAE GreenGuide: Design, Construction, and Operation of Sustainable Buildings
[ ] Cooling Technology Institute
[ ] ASHRAE UFAD Guide and O&M Guide Set
[ ] ASHRAE Standard 90.4 (Energy Standards for Data Centers)
[ ] ASHRAE Standard 202 (Commissioning Process for Buildings and Systems)
DESIGN INTENT DOCUMENT (DID)
HVAC Design Intent
[ ] The HVAC system selection and design intent is based on the processed outlined in ASHRAE Handbook 2020, Chapter 1, HVAC System Analysis and Selection
[ ] Program and Project Goals: Functional Goals: (refer to chapter 1, 2020 Handbook), Budget Goal: First Cost, and Timeline Goal(s): Four-Month Construction Period
[ ] Finalized System Selection Shall Be Replacement Cooling Tower and Standby Cooling Tower to Serve the Financial Data Center
[ ] Specialized Systems Shall Include the Existing Plate and Frame Waterside Heat Exchanger located in Central Chiller Plant
[ ] Special System(s): Sound Attenuators and Vibration Isolators
[ ] Air Filters: MERV-14 Filters in the New CRAC Units
[ ] Terminal Units: Variable Refrigerant Flow (VRF) Fan Coil
DESIGN CRITERIA DOCUMENT
[ ] The HVAC Design Criteria Shall Be in Sync with the Project Delivery Method and Owner’s Project Requirements.
[ ] A Construction Phased Cooling Tower and Standby Tower Replacement Schedule Is Based on the Facility’s Deferred Maintenance Replacement Plan
[ ] Raised Floor 2-By-2-Foot Floor Tiles Shall Be Coordinated in Anticipation of the Data Center Equipment’s Arrival. Underfloor Supply Air Shall Also Be Provided Directly Below Specific Pieces of Computer Equipment.
[ ] Rebalancing of the Condenser Water System for Condenser Water Flow, Standby Flow, and for Waterside Economizer Flow Sequences
[ ] The Design Team Shall Provide Contract Drawings and Specification Coordinated with Equipment Weight; Electric Data, Including Emergency Power Requirements, and Plumbing Criteria to Solicit General Contractor Bids
[ ] Field Fabrication Drawings Shall Become the Record Drawings at Closeout
[ ] CRAC Units Shall Be Furnished with O&M Manuals. The Preventive Maintenance Work Orders Shall Be Uploaded to the Outsource O&M Contractor’s Computerized Maintenance Management Software (CMMS) system
[ ] The D-B-B Contractor Shall Provide System Training to the Building’s O&M Staff Regarding the Air Conditioning, Humidification, and Electrical Systems