California Statewide Utility Codes and Standards Program
Acceptance Testing Topic #1:
PIER Study Acceptance Testing Stakeholder Meeting #2
PECI
Energy Solutions
December 7, 2010
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
22
PIER Study Acceptance Testing
● Summary of current code requirements
● Typical practice
● Summary of code change proposals
● Data/findings
● Specifics of code change proposals
● Remaining data collection and analysis
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
3
PIER Study Acceptance TestingCurrent Code Requirements (Mandatory)
● §125 Acceptance requirements● Functional tests (performance verification)
performed on select lighting, envelope, & HVAC systems
● Acceptance tests are conducted:● After construction and start-up● Before occupancy and normal use of the
equipment
● Who can perform the tests:● Licensed mechanical engineer, civil engineer,
architect or contractor
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
4
PIER Study Acceptance TestingCurrent Code Requirements (Mandatory)
● NA7.5.4 Air Economizer Controls Acceptance Test● In-field functional tests
1. Cooling demand, economizer 100% open
2. Cooling demand, economizer @ minimum position
3. Heating demand, economizer @ minimum position
● If the economizer is factory installed and certified by the manufacturer to the CEC, no field testing is required
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
5
PIER Study Acceptance Testing
Typical Practice
● Performance verification is uncommon
● Low compliance and enforcement● Responsible party not specified on forms (MECH-1C)
● Building officials not requesting/checking forms
● Building departments are underfunded and understaffed
● Reduced/eliminated training budgets
● Outsourcing plans examinations
● Inspectors not familiar with requirements
● Contractors unfamiliar with tests
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
6
PIER Study Acceptance Testing
Code Change Proposals
● Increase compliance and enforcement● Improve test protocols● Modify as needed:
● code language● test forms● compliance manual● reporting procedures● enforcement procedures
● Outreach and education activities● MEP firms involved with plans examinations
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
7
PIER Study Acceptance Testing
Code Change Proposals
● Responsible Person’s Declaration Statement
● Allow only a licensed contractor● Prohibit architect and engineer● Maintains pathway of professional qualifications● Improves the pathway to accountability
● CEC to retain electronic copies of Certificate of Acceptance documentation
● Similar to document registration procedures introduced for residential projects
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
8
PIER Study Acceptance Testing
Data Collection and Analysis
● Evaluate acceptance testing enforcement activities
● Phone interviews, BD visits
● Investigate effectiveness of acceptance tests
● Observe field tests: 9 sites finished, 3 scheduled
● Characterize the findings and make recommendations
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
9
PIER Study Acceptance Testing
Data Collection and Analysis
Acceptance tests under investigation
Estimated first-year statewide
electrical energy savings(kWh/yr)
NA7.6.4 Automatic time switch control acceptance 77,331,471
NA7.5.4 Air Economizer Controls 35,327,933
NA7.5.2 Constant-Volume, Single-Zone, Unitary AC & HP 7,132,384
NA7.6.3 Manual Daylighting Controls Acceptance 5,776,214
NA7.6.1 Automatic Daylighting Controls Acceptance 5,302,803
NA7.5.3 Air Distribution Systems 4,354,035
NA7.5.6 Supply Fan Variable Flow Controls 3,709,388
NA7.5.1.2 Constant Volume System Outdoor Air Acceptance 2,421,289
Data from Evaluation of Nonresidential Acceptance Requirements Final Report, 9/2005, HMG for PG&E
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
10
PIER Study Acceptance Testing
Data Collection and Analysis
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
11
PIER Study Acceptance Testing
Specifics of Code Change Proposals
MECH-2A Outdoor Air Acceptance Tests
Construction Inspection: ● Added reference to conducting MECH-7A with MECH-2A.● Added details to Instrumentation that is needed to conduct
the test.● Added supporting documentation for reference including
Standards and Nonresidential Compliance Manual.● Added information under VAV checklist to be consistent
with At-a-glance forms.● Added information regarding fixed outside air damper as
opposed to dynamically controlled damper.● Added a notes section under construction inspection for
contractor comments.
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
12
PIER Study Acceptance Testing
Specifics of Code Change Proposals
MECH-2A Outdoor Air Acceptance Tests
Functional Testing:● Edited formatting to be consistent with At-a-glance forms,
i.e. step #’s.● Added Mechanical Equipment Schedules as a reference
document for design outside air requirements.● Added “Record VFD speed” as part of procedure.● Edited part B Testing Calculations & Results. Test required
outside air measurement to be within 10% of design value. Test would fail if outside air was greater than 110% of design. Some systems in the field are not equipped with dynamic control of the outside air damper thus test would fail. Title 24 only requires minimum outside airflow. Therefore added note to the form to explain if the test fails because of too much outside air.
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
13PIER Study Acceptance Testing
Remaining Data Collection & Analysis
● Estimated energy savings● Use ex-post evaluation of savings, which
accounts for compliance● Recover a portion of these savings due to
improved testing guidance and increased compliance
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
14
PIER Study Acceptance Testing
Connections to Design Phase Cx
● Incorporate tests into construction documents
● Responsible party specified on Cx plan
● Require the Cx Authority to collect/review forms
California Statewide Utility Codes and Standards Program
Acceptance Testing #2: Retrocommissioning Failure Modes Stakeholder Meeting 2
Energy Solutions
PECI
December 7, 2010
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
16
AT2: RCx Failure ModesIntroduction: Current Code Requirements (Mandatory)
● §125 Acceptance requirements● Functional tests (performance verification) performed on select
lighting, envelope, & HVAC systems
● Acceptance tests are conducted:● After construction and start-up● Before occupancy and normal use
● Who can perform the tests:● Licensed mechanical engineer, civil engineer, architect or
contractor
● Performance verification is uncommon
● Low compliance and enforcement
05 / 20 / 2010
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
17
Introduction: Background Research
● PECI CA RCx program dataset
● > 800 failures across 125 buildings
● Criteria ● Frequency
● Energy Savings
● Suitability for Acceptance requirements
● New or Revised Acceptance requirements
AT2: RCx Failure Modes
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
18
Proposed Code Change
● Supply Air Temperature Reset Controls
AT2: RCx Failure Modes
● Condenser Supply Water Temp Reset Controls (NA 7.5.8)
● Chiller Staging
● Boiler Lockout
● Whole Building Optimum Startup
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Proposed Code Change
● Supply Air Temperature Reset● Reset SAT depending on OSAT, RAT● High and Low Load Conditions● 144(f): Space Conditioning systems● 2 – 4 hrs
AT2: RCx Failure Modes
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
20
Proposed Code Change
● Supply Water Temperature Reset Controls: Condenser Water Supply● NA 7.5.8● High and Low Load Conditions● Water-cooled CHW Systems, Section
144(j)● + 1 hr (1 – 5 hrs total)
AT2: RCx Failure Modes
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
21
Proposed Code Change
● Chiller Staging● Sequential Chiller Loading & Startup● Multi-chiller systems, Section 144● Chiller Schedule – DPCx● 2 – 6 hrs
AT2: RCx Failure Modes
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
22
Proposed Code Change
● Boiler Lockout● Boiler shutoff below SAT/OAT setpoint
● (70F OAT DB calculations)
● HW Heating Boilers with shutoff controls, Section 144(j)
● 2 – 4 hrs
AT2: RCx Failure Modes
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
23
Proposed Code Change
● Whole Building Startup (BAS Startup)● BAS Optimal System Startup (morning
condition)● Any BAS or EMCS, Section 122● 1 – 3 hrs
AT2: RCx Failure Modes
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
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Estimated Energy Savings
● EnergyPro Models● Four prototypes:
Office, Hotel, School, Retail
● T24 ACM HVAC Baseline systems
● 16 CZs (CZ 3 so far)● Site (per sq ft)
● PECI RCx Measured Savings● Site (per sq ft)● Measured by RCx
program● Sample size
between 9 - 126
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Estimated Energy Savings
● Effectiveness:● Prevalence of Failures● Likelihood of Being Detected by Testing /
Commissioning● Compliance / Testing Effectiveness (Not
Considered for This Analysis)
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Estimated Energy Savings: RCxAT2: RCx Failure Modes
Measure Site Savings (RCx Dataset)
00.02
0.040.06
0.080.1
0.120.14
0.16
Supply AirTemperature
Reset
Supply WaterTemperature
Reset
Boiler Lockout OptimumSystem Startup
Chiller Staging
kWh
/sf
0.000
0.005
0.010
0.015
0.020
Th
erms / sf
kWh / sf therms / sf
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Estimated Energy Savings: Modeling
SAT Reset Savings kWh / SF
0
0.005
0.01
0.015
0.02
0.025
0.03
kWh
/ sf
SAT Reset Savings TDV $ / SF
$-
$0.10
$0.20
$0.30
$0.40
$0.50
$0.60
TDV
$ /
sf
•Base Case: Constant Control Hot, Warmest Zone Reset Cold Deck
•Savings Case: OA Reset both Hot & Cold
•Office, Hotel, Retail Models
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Estimated Energy Savings: Modeling
CWST Reset Savings kWh / SF
-0.35
-0.3
-0.25
-0.2
-0.15
-0.1
-0.05
0
kWh
/ sf
CWST Reset Savings TDV $ / SF
$(0.70)
$(0.60)
$(0.50)
$(0.40)
$(0.30)
$(0.20)
$(0.10)
$-
TDV
$ /
sf
•Base Case: No CWST Reset
•Savings Case: CWST Reset
•Office, Hotel Models
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Estimated Energy Savings: Modeling
Boiler Lockout Savings therms / SF
0
0.000005
0.00001
0.000015
0.00002
0.000025
0.00003
0.000035
0.00004
0.000045
ther
ms
/ sf
Boiler Lockout Savings TDV $ / SF
$-
$0.0004
$0.0008
$0.0012
$0.0016
TDV
$ /
sf
•Base Case: Normal Operation
•Savings Case: Lockout Below 70F
•Office, Hotel, Retail Models
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Estimated Energy Savings: Modeling
Optimum Start Savings kWh / SF
0
0.02
0.04
0.06
0.08
0.1
0.12
kWh
/ sf
Optimum Start Savings TDV $ / SF
$-
$0.05
$0.10
$0.15
$0.20
$0.25
TD
V $
/ sf
•Base Case: Normal Operation
•Savings Case: Early by 1 Hr
•Office, Hotel, Retail, School Models
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Estimated Energy Savings: Modeling
Chiller Staging Savings kWh / SF
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0.2
kWh
/ sf
Chiller Staging Savings TDV $ / SF
$-
$0.10
$0.20
$0.30
$0.40
$0.50
$0.60
TDV
$ /
sf
•Base Case: Parallel to 90%
•Savings Case: Parallel to 90%, Inefficient-Order
•Office, Hotel Models
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
32
Statewide Energy Savings
● Scale by square footage● CEC Construction Data
● Scale by system characteristics● CBECS
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Statewide Energy SavingsAT2: RCx Failure Modes
First-year CA Savings (1000 MMBTUs)
-40
-30
-20
-10
0
10
20
30
Supply AirTemperature
Reset
CondenserWater
TemperatureReset
Boiler Lockout OptimumSystemStartup
ChillerStaging
1000
MM
BT
U
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Estimated Costs
● Salary for Functional Tests: ● Hourly + O&P
(56%)
● Salary for Forms Review:● Responsible Person
Open Shop
HVAC Contractor
(US BLS)
$36.19
Controls Contractor
(US BLS)
$42.28
Mechanical Engineer
(US BLS)
$67.03
AT2: RCx Failure Modes
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
35
Estimated Costs
● No testing equipment costs assumed ● Sensors, etc.
● No cost savings assumed● Reduced need for repair● Longer equipment lifetime
● No costs for Building Department Review
AT2: RCx Failure Modes
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
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Estimated CostsAT2: RCx Failure Modes
Max Test Time (hrs)
Avg. Review Time (hrs)
Total Per-test Cost
SAT Reset 4 0.5 $134
CWST Reset + 2 0.5 $84
Boiler Lockout 3 0.5 $109
Optimum System Start
3 0.5 $109
Chiller Staging 6 0.5 $184
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
37
Measure Cost-EffectivenessAT2: RCx Failure Modes
Cost (PV $) Avg. Savings TDV (PV $)
LCC Savings (PV $)
SAT Reset $134 $158,744 $158,635
CWST Reset $84 - $60,109 - $60,000
Boiler Lockout
$109 $123 $26
Optimum System Start
$109 $13,158 $13,074
Chiller Staging
$184 $35,239 $35,092
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
38
Measure Cost-EffectivenessAT2: RCx Failure Modes
Average Measure Life Cycle Costs ($ / SF)
Supply Air Temperature
Reset
Condenser Water
Temperature Reset
Boiler Lockout
Optimum System
Start
Chiller Staging
-$2.00
-$1.50
-$1.00
-$0.50
$0.00
$0.50
$1.00
$ /
SF
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
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Next Steps
● Modeling all 16 CZs
● Calculations● Scaling to Statewide Savings● Equipment O&M Costs● Degradation of Savings over Time
● Integration with AT #1(Compliance & Enforcement Issues)
AT2: RCx Failure Modes
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Remaining Issues
● Costs
● Modeling● Required models and CZs
● Energy Savings Calculation● Per square footage vs. per system
characteristics
● Scope● Compliance
AT2: RCx Failure Modes
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
41
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
??QUESTIONS & COMMENTSElizabeth Joyce
Energy Solutions
510-482-4420 x229
AT2: RCx Failure Modes
California Statewide Utility Codes and Standards Program
Design Phase Commissioning Stakeholder Meeting 2
Southern California Edison California Commissioning Collaborative
• Portland Energy Conservation Inc • Summit Building Engineering
December 7, 2010
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
43
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx)
Topics Covered
● Why Design Review
● Background Research
● Proposed Concept
● Example of Design Review Checklist
● Savings Methodology
● Large Office Results
● What’s Next
● Stakeholder Discussion
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
44
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx)
Why Design Review ● Energy
● Increase compliance with Title 24 energy requirements ● Increase best practices that go beyond Title 24
● Cost & Time (time=money) ● Reduce number of significant change orders● Reduce administrative time issuing RFIs and change
orders ● Reduce delays associated with resolving deficiencies.
● Quality Building ● That operates as intended● That is easier to construct and maintain ● That has low long term operating cost
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
45
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx)
Why Design Review
● Key Part of Building Commissioning Protocol● Commissioning: a quality assurance process that spans
the entire design and construction process
● Includes verifying and documenting that building systems are:
● Planned and designed properly
● Installed and tested properly
● Operated and maintained properly
Reference: CALGreen Description - 2010 California Green Buildings Standards Code, Title 24, Part 11.
Design Review
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
46
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx)
Why Design Review
● Early involvement generates greatest energy impact
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
47
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Background Research
● Stakeholder Surveys
● Published commissioning protocols
● T24 Requirements● Part 6 Compliance Paths ● Part 6 Acceptance Requirements ● Part 11 CALGreen Commissioning
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
48
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Background Research - Stakeholder Surveys MEP Designers
● General support for the design review
● Some informal internal design review completed
● Concern with added complexity to an already complex compliance process
Commissioning Providers
● Design review is part of successful commissioning
● Concern with qualifications of design reviewer
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
49
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Background Research - Stakeholder Surveys Owners Often already doing some form of commissioning See value when administered by good
commissioning authority (CA) Concern of added coordination time and cost
Code Officials
● No additional review or compliance checks
● Single point of sign off by Design Reviewer
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
50
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Background Research – Cx Protocols
ASHRAE Guideline 0
CALGreen 2010
IGCC LEED 2009
Enhanced Cx
Owner's Project Requirements √ √ √
Cx Plan √ √ √ √
Basis of Design √ √ √
Cx in Construction Documents √ √ √
Construction Checklists √
Design Review √ √
Functional Performance Testing √ √ √ √
Documentation and Training √ √ √
Final Cx Report √ √ √ √
Post Occupancy Cx √ √ √
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
51
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Proposed Concept - Survey Attributes
Desired Outcomes: ● Effective – not overly burdensome
● Practical –targets items with most impact
● Not duplicative to existing T24 compliance
● Effort and cost scalable to project size
● Integrated with AT and CALGreen Cx
● Enforceable
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
52
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Proposed Concept – CEC / Utility Attributes Desired Outcomes: ● Compliance
● Integrate current T24 requirements in construction documents
● Compliment T24 acceptance testing requirements● Add key element (Design Review) to CALGreen for a
comprehensive commissioning protocol
● Implementation of design best practices
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
53
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Proposed Concept
Basic Elements● Completed checklist required for all NR projects
that obtain Certificate of Compliance● Design Review varies with building size and
system types (simple or complex) ● Timing: SD project review and CD design review
checklists
Design Reviewer (DR) Qualifications ● Self Review for simple systems and < 10K sqft● In-house review <75K sqft by registered engineer ● 3rd party review >75K sqft by registered engineer
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
54
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Proposed Concept
1st Design Review
2nd Design Review
Completed Design Review
Checklist
DESIGN PERMITTING CONSTRUCTION
Certificate of Occupancy
Schematic Design
Design Development
Construction Documents
Permit Application
Plan Check
T24 Requirements
Met?
Timeline
Programmingbuilding
> 10,000 ft2 building
<= 10,000 ft2
Acceptance Testing
Commissioning & Acceptance
Testing
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
55
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Proposed Concept – SD Project Review
● Initial coordination to define project and Design Review needs
● Hold kick–off meeting with owner and project team
● Discuss Design Review process and present required and best practice checklists
● Discuss future CD Design Review approach and timing / scheduling factors
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
56
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Proposed Concept – CD Design Review
1. Substantially complete design doc.s distributed
2. Design Reviewer performs checklist review
3. Signed Design Review form sent to owner and project team
4. Project team addresses review comments
5. Design Review forms/sign-off are printed on Bid Set and submitted with application
6. Code official confirms signed forms are included in plans as part of compliance check
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
57
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Proposed Concept – Extent of Review
● Simple system Design Review is estimated at 16 hours
● Complex system in smaller building, Design Review is estimated at 32 hours
● Complex system in larger building, Design Review is estimated at 54 hours
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
58
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Proposed Concept
Relationship to AT and CALGreen Commissioning
● Design review checklist should include acceptance requirements
● If Title 24, Part 11 (CALGreen) is applicable:● Confirm CALGreen cx requirements are included in plans/specs● Confirm Cx specification are clear and complete● CALGreen Cx plan should clarify who is responsible for performing
acceptance testing
● Recommendation vs. Requirement: a single entity (typically the commissioning authority) could be responsible for coordinating design review, acceptance requirements and commissioning
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
59
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Proposed Concept Integration of Design Review
ScheduleAcceptance
TestingTitle 24
ComplianceCALGreen
CommissioningDesign Review
Schematic Design CxA DR/CxA
Design Development PE/EC CxA
Construction Documents PE PE/EC CxA DR/CxA
Permitting PE/EC CxA
Build AA/CxA CxA
AA Acceptance Agent
CxA Commissioning Agent/Authority
EC Energy Consultant or Energy Compliance Professional
PE Professional Engineer
DR Design Reviewer
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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60
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Typical Design Review Checklist
Title 24 Prescriptive Non-Residential Energy Measures--Reviewer Checks10/12/2010 From 2010 Title 24 Part 6 Reviewer Disposition (date or note #)
Code Section Measure
Complie
s
Does N
ot
Comply
Note ID
144 Prescriptive Requirements for HVAC Systems144(a) Sizing and equipment selection.
144(b) Calculations.
144( c)1. CV fan system with more than 25 hp shall not exceed 0.8 W/cfm of supply air.
144( c)2.AVAV: fan power at design conditions for total system horsepower over 25 hp shall be less than 1.25 W/cfm of supply air.
144( c)2.B.iii.For VAV fans 10 hp or greater: Variable speed drive, and motor demand must be controlled to be no more than 30% of the total design wattage at 50% of design cfm when static pressure set point equals 1/3 of the total design static pressure, based on certified mfr data.
144( c)2.C.Static pressure sensor location in VAV system. If pressure isn't reset (system isn't DDC), sensor must be located so the set point is less than 1/3 the total design fan static pressure. If sensor must be after branch takeoffs, sensors in each branch are r
144( c)2.D.Reset. In VAV systems, static pressure must be reset if there are DDC controls at the zone level. Control must reset down until one zone damper is nearly wide open.
144( c)3Air treatment or filtering shall comply with a fan power index using Eq. 144-A. (Adjusted FPI = FPI x Fan adjustment. Where Fan adjustment = 1 - ((S Pa - 1) / S Pf), where S Pa = air pressure drop of the treatment or filter; S Pf = total pressure drop acr
144( c)4Fan motors of series fan powered terminal units. Fans of FPTU of 1 hp our less shall be ECM or have a minimum efficiency of 70% per NEMA Std MG 1 2006 at full load.
144(d)Space conditioning zone controls shall be provided (in each zone) to prevent reheating, recooling and simultaneous heating and cooling.
144(d)3-A
Air terminals' primary airflow shall be at most 50% or the min % OA rate during reheat and 20% or the min % OA rate during deadband, whichever is the larger rate in each case. Exceptions: Zones with special pressurization or humidification requirements or zones with peak cfm of 300 cfm or less.
144(d)3-BAir terminals' without DDC primary airflow shall be at most 30% during reheat. Exceptions: Zones with special pressurization or humidification requirements or zones with peak cfm of 300 cfm or less.
144(e)Economizers (water or air) are required on fan systems with a design supply capacity over 2,500 cfm and total mechanical cooling capacity over 75,000 Btu/hr
144(e)1.A.Air economizers. OA and RA dampers must be able to modulate to supply 100% of the design supply air as outside air.
144(e)1.B.Water economizers. Must provide 100 percent of cooling load at outside air temperatures of 50 degrees dry bulb/45 degrees wet bulb and below.
144(e)2.A. Economizer operation shall not increase building heating energy use during normal operation.
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Example of Design Review Checklist
Inclusion of Best Practice
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
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CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Savings Methodology
● Create and run energy models● Modified DEER 2008 models (updated to 2008 T24 and
other needed changes)● eQUEST hourly simulation of base case for a well
designed building● Rerun the model with code issues not in compliance● Tabulate energy impacts vs. base case● Apply factor for how often each code measure not in
compliance● Estimate impacts of “Better Practice” suggestions and
other design review comments
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Large Office Preliminary Results
Measure selection based on following criteria
● RCxing Annex report findings ● Project team engineering judgment
● Energy savings impact ● Likelihood of not being well specified ● Ease of identifying during design review
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
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CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
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CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Insert CASE Author Name
Insert contact info
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
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CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Design Phase Commissioning (Cx) Next Steps
● Solidify design review measures to be examined ● Complete savings analysis in additional buildings
● office S&L / retail / restaurant / school
● Run models for multiple climate zones ● Extrapolate to statewide new building stock● Perform additional costing exercise● Run cost effectiveness analysis ● Re-examine Design Review concept based on cost
effectiveness results
CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
Date
67
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
??QUESTIONS & COMMENTS
Design Phase Commissioning (Cx)
Glenn Hansen, PECI – (503) 467 – [email protected]
Karl Stum, SBE (360) 771 – [email protected]