A Building Commissioning Overview. Presented by: Goetting & Associates Commissioning

Transcription

1 A Building Commissioning Overview Presented by: Goetting & Associates Commissioning

2 What is the Definition of Commissioning? Building Commissioning is a Quality Assurance Process of documentation, testing, adjusting, verification, and training performed specifically to ensure that the finished facility operates in accordance with the owner s documented project requirements and the construction documents. Building Commissioning is a scope driven Quality Assurance Process. Commissioning begins in predesign and continues through design, construction, and occupancy of the facility. Commissioning is not a single event placed at the end of the contractor s schedule

3 Commissioning Groups The following industry leaders promote training, publish procedural Standards, offer certification programs and all agree on a process approach BCA-Building Commissioning Assc. NEBB-National Environmental Balancing Bureau ASHRAE PECI-Portland Energy Conservative

4 Types of Commissioning Commissioning Recommissioning Retrocommissioning Continuous Commissioning

5 Commissioning Documents Commissioning Specifications Commissioning Plan Deficiency Log - Commissioning Issues Log - Resolution Log

6 Commissioning The Building Commissioning process has five major phases for new or renovated projects: Pre-Design Design Construction Acceptance Post Acceptance

7 Commissioning Pre-Design Phase Document Owner s Project Requirements Set scope of Commissioning Services Set a budget for commissioning Select Commissioning Authority Create draft Commissioning Plan

8 Commissioning Design Phase Document Basis of Design Refine and detail scope of Commissioning Perform Design Review 30%-50%-95% Update Commissioning Plan Include Commissioning requirements in specifications Assist in preparation of construction documents Assist in preventing overlaps and scope gaps on the project manual

9 Commissioning Construction Phase Final Commissioning Plan & schedule Review Construction submittals Review building control sequences Write Pre-Functional Checklists Write Functional Test procedures Document construction observation Help reconcile discovered issues

10 Commissioning Acceptance Phase Training of O&M Personnel Functional Performance Testing Documentation of deficiencies found during FPT Deficiency correction and retesting Final Report

11 Commissioning Post Acceptance (Warranty) Phase Assist with Maintenance management program Adjust for occupancy/warranty period Off-season tests Possible Lessons-Learned meeting Continuing Commissioning

12 Recommissioning The Recommissioning process is a program that is intended to retest the facility periodically in order to return the building and systems to the original commissioned conditions.

13 Recommissioning Use the same Functional test procedures and documents as used in the original commissioning Prepare a final report Could be an Owner supplied service

14 Retrocommissioning The Retrocommissioning program is designed to commission an existing building that was never initially commissioned. It is a systematic process for investigating, analyzing, and optimizing the performance of building systems by improving the operation and maintenance to ensure the continued performance over time. Retrocommissioning helps make the building systems perform interactively to meet the owner s current facility requirements.

15 Retrocommissioning The Retrocommissioning process has five major phases: Contract Discovery Corrective Action Construction Acceptance

16 Retrocommissioning Contract Phase Commissioning Agent Selection Commissioning project contract

17 Retro Cx Plan Retrocommissioning Discovery Phase Document-Discovery and Review Maintenance Staff Interview Occupant Interview Site Investigation Controls System Investigation Problem Analysis Discovery Phase Report Report Presentation Remedial Design (internal)

18 o Corrective Action Retrocommissioning Corrective Action Phase o Construction Procurement o Construction Cx Scoping Meeting o Prepare Schedule for Cx activities o Submittal and shop drawing review o Finalize Construction Plan o Initiate Prefunctional checks o Meetings as necessary

19 Retrocommissioning Acceptance Phase Complete all Prefunctional checks Perform all operational checks, point to point tests and TAB Functional Performance Testing Prepare final Commissioning Report

20 Continuous Commissioning* All too often building performance declines over time due to unintended side effects of control engineering, operator decisions and equipment wear and tear. Continuous Commissioning is an ongoing process to resolve operating problems, improve comfort, optimize energy use and identify retrofits for existing commercial and institutional buildings and central plant facilities. *As defined by Texas A&M / ESL for the Federal Energy Management Program (FEMP)

21 Continuous Commissioning has 2 Major Phases Phase 1-Project Development Step 1 Identify building or facility Step 2 Audit and Project Scope

22 Continuous Commissioning has 2 Major Phases Phase 2-Implementation and Verification Step 1 - Develop CC plan and team Step 2 - Develop performance base Step 3 - Conduct System Measurements and Proposed CC measures Step 4 - Implement CC Measures Step 5 - Document comfort improvements and energy savings Step 6 - Don t stop, keep on doing it!

23 Commissioning & LEED Certification Increased demand for quality assurance Commissioning is a pre-requisite. Commissioning complements Green Design Means to achieve environmental, economic and health-safety goals resides in the commissioning process Commissioning is an integral component of LEED certification.

24 Commissioning & LEED Certification Commissioning requirements are specific to each LEED Rating System Cx is a prerequisite in: LEED New Construction NC v2.2 LEED for Schools 2007 LEED Commercial Interiors v2.0 LEED Core and Shell v2.0 LEED Retail New construction Pilot v2.0 Commercial Interiors Pilot v1.0

25 Commissioning & LEED Certification Four systems are required to meet minimum prerequisites: HVAC and controls Daylighting and lighting and controls Domestic hot water system Renewables

26 LEED Prereq and Enhanced Timeline

27 LEED for EB: O&M (Site Selection) Site Selection (SS) SS Credit 8: Light Pollution Reduction Electrical Design or Lighting Consultant

28 Water Efficiency (WE) LEED for EB: O&M Water Efficiency (WE) WE Prerequisite 1: Minimum Indoor Plumbing Fixture and Fitting Efficiency Reduce indoor potable water Demonstrate fixture performance (calcs) Policy for upgrades to higher efficient devices WE Credit 1.1: Permanently installed meter for total use WE Credit 1.2: and at least one other systems WE Credit 2.1: 10% potable water reduction (indoor) WE Credit 2.2: 20% potable water reduction (indoor) WE Credit 2.3: 30% potable water reduction (indoor) WE Credit 3.1: 50% landscaping water reduction WE Credit 3.2: 75% landscaping water reduction WE Credit 3.3: 100% landscaping water reduction WE Credit 4.1: Cooling Tower Chemical Management WE Credit 4.2: Cooling Tower Nonpotable Water Source Use

29 LEED for EB: O&M (Energy & Atmosphere) Energy and Atmosphere (EA) EA Prerequisite 1: Energy Efficiency Best Management Practices Planning, documentation and Opportunity Assessment Document SOO Building operation and maintenance plan Create narrative for mechanical and electrical systems Create narrative for preventative maintenance plan ASHRAE Level 1 Energy Audit EA Prerequisite 2: Minimum Energy Efficiency Performance Establish min level of operating efficiency-in conjunction with Credit 1. EA Prerequisite 3: Refrigerant management Ozone Protection Verify non use of CFCs EA Credit 1: Optimize Energy Efficiency Performance Option A: verify Energy Star Rating Option B: Demonstrate 19% energy efficiency over average building Option C: Use alternate method

30 LEED for EB: O&M (Energy & Atmosphere) cont d EA Credit 2.1: Existing Building Commissioning: Investigation and Analysis Option A: Commissioning Process (plan for RetroCx, ReCx or CCx) Option B: ASHRAE Level II Energy Audit EA Credit 2.2: Existing Building Commissioning: Implementation Low cost improvements and capital plan for major retrofits and upgrades Provide training for sustainable building operations Anticipated financial costs and benefits Update the building operating plan EA Credit 2.3: Existing Building Commissioning: Implementation Implement ongoing commissioning program Create a written plan summarizing the overall commissioning cycle Complete 50% of work in the first commissioning cycle Update the building operating plan

31 LEED for EB: O&M (Energy & Atmosphere) cont d EA Credit 3.1: Performance Measurement Have in place Building Automation System EA Credit 3.2: Performance Measurement: System Level Meter Metering in place for at least 40% of annual energy consumption EA Credit 3.3: Performance Measurement: System Level Meter Metering in place for at least 80% of annual energy consumption EA Credit : Renewable Energy 1 to 4 available for on/off site renewable energy EA Credit 5: Refrigerant Management Option A: No refrigerant use Option B: Minimize or eliminate Refrigerants that contribute to ozone depletion EA Credit 6: Emissions Reduction Reporting Identify and report on building performance that reduces energy and emissions.

32 LEED for EB: O&M (Indoor Environmental Quality) EQ Prerequisite 1: Outdoor Air Introduction & Exhaust Systems Option A: Comply with ASHRAE Option B: or maintain at least 10 cfm per person EQ Prerequisite 2: Environmental Tobacco Smoke (ETS) Control Option A: Prohibit smoking Option B: Establish smoking areas under negative pressure Option C: Residential EQ Credit 1.1: IAQ Best Management Practices: IAQ Management Program Develop management program based on EPA I- BEAM

33 LEED for EB: O&M (Indoor Environmental Quality) EQ Credit 1.2: IAQ Best Management Practices: Outdoor Air Delivery Monitoring Provide OA measurement devices CO2 sensors for densely populated areas. EQ Credit 1.3: IAQ Best Management Practices: Increased Ventilation Increase OA at least 30% above ASHRAE EQ Credit 1.3: IAQ Best Management Practices EQ Credit 1.5: IAQ Best Management Practices: Management for Facility Alterations and Additions Implement IAQ management plan for construction and occupancy Filtration for construction and occupancy HVAC and lighting returned to designed SOO EQ 2.1: Occupant Comfort: Occupant Survey Comfort and complaint survey for thermal, acoustics, IAQ, and other issues EQ 2.2: Occupant Comfort: Lighting controls for at least 50% of people EQ 2.2: Occupant Comfort: Thermal Comfort Monitoring Monitor as stated in ASHRAE EQ 2.4: Occupant Comfort: Daylight and Views Achieve 2% daylight factor in 50% of spaces for critical visual tasks.eq 2.5: Occupant Comfort: Daylight and Views. Achieve 2% daylight factor in 75% of spaces for critical visual tasks

34 LEED for EB: O&M (Innovation in Operations) IO Credit 1: Innovation in Operations Credits 1.1 to 1.4 for exemplary or significant performance IO Credit 2: LEED Accredited Professional IO Credit 3: Documenting Sustainable Cost Impacts Document overall building costs for previous 5 years

35 Costs of Commissioning Whole Building from design to acceptance.75 to 1.5% of Construction Cost (average is 1% of Construction cost) HVAC/Automated Controls/Plumbing 2.5 to 4.5% of Mechanical, Controls and Plumbing contracts Electrical Systems ONLY 1.0 to 1.5% of Electrical Contract Origin - USGBC Owner slide show PECI Portland Energy

36 Costs of Commissioning Commissioning Cost as % of total construction cost by project size and type Total Construction cost less than $5 million Cx cost ~ 2%-4% Total Construction cost between $5 - $10 million Cx cost ~ 1%-3% Total Construction cost between $10 - $50 million Cx cost ~ 0.8%-2.0% Total Construction cost greater than $50 million Cx cost ~ 0.5%-1.0% Laboratories and complex buildings Add 0.25% to 1.0% to Cx cost

37 Questions, Comments & Ideas?