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California Statewide Utility Codes and Standards Program
Process Air Compressors,
Boilers, and Water Heaters #1
Energy Solutions
Heschong Mahone Group, Inc.
Portland Energy Conservation, Inc.
Taylor Engineering
May 25, 2010
May 25, 20102011 Title 24 CASE Process Update
2CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
2
Agenda
● 10:00–10:15 Introductions
● 10:15–11:15 Water Heater Standby Loss
● 11:15-11:30 Hot Water Temperature Reset
● 11:30-12:15 Process Boilers
12:15– 1:00 Lunch
● 1:00–2:00 Air Compressors
● 2:00–2:15 Closing Comments
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
3CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
3
IOU Support for 2011 Title 24
● The California Investor Owned Utilities (IOUs) are actively supporting the California Energy Commission (CEC) in developing the state’s building energy efficiency code (Title 24)
● Their joint intent is to achieve significant energy savings through the development of reasonable, responsible, and cost-effective code change proposals for the 2011 code update and beyond
● As part of the IOU effort, at the request of the CEC, we are hosting stakeholder meetings to get industry input and feedback on our code change proposals
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
4CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
4
Code Change Activity
● 2011 T-24 Base Code (Part 6 of Title 24)
● 2011 Reach Standard (Part 11 of Title 24)
● Green Building Standard – i.e. CalGreen
● Voluntary standards that local governments can
adopt
● Future Codes
● 2014 T-24
● Future Reach Codes
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
5CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Requirements for a Successful Code Change
● To be included in the base code, a measure must:● Be cost-effective
● based on the standards-induced additional first cost, maintenance costs, measure life, and energy cost savings
● according to the Time Dependent Valuation (TDV) life-cycle costing methodology and weather data to be provided by the California Energy Commission
● Be possible to implement using equipment that is available from multiple providers or that is reasonably expected to be available following the code change
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
6CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Stakeholder Meetings Process
● Minimum of three meetings:
● First: present scope, request data
● Code change direction and possible options
● Methodology
● Best practices, market data
● Second: present findings
● Results of data collection and analysis
● Cost effectiveness
● “Strawman” proposed code language
● Third/final: present proposed code language
● All meetings can be attended remotely
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
7CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Outline For Measure Presentations
● Summary of current code requirements
● Typical practice
● Summary of potential code change proposals
● Initial data/findings
● Planned data collection and analysis
● Specific stakeholder requests
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
8CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
8
Submitting Comments
● Informal Comment Process
● Comments can be submitted to CASE authors,
substantive comments will be receive responses.
● Questions and responses will not be posted
online, but common or frequent questions will
be communicated as necessary between
stakeholders
● The team will work with stakeholders to resolve
issues as best we can.
● The CEC has a formal comment process during
later stages of the official rulemaking process
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
9CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Types of Code Change
● Mandatory Measure: The change would add or modify a mandatory measure
● Mandatory measures must be satisfied whether the prescriptive or performance method is used to show compliance
● Prescriptive Requirement: The change would add or modify a prescriptive requirement that must be met when using prescriptive compliance approach
● When using performance compliance (computer modeling), prescriptive requirements define a standard design (which sets the energy budget) and are not mandatory
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
10CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Types of Code Change – Ctd.
● Compliance Option: The change would add or modify a new measure to the list of existing compliance options for meeting the Standards using the performance approach.
● Modeling: The change would modify the calculation procedures or assumptions used in making performance calculations.
● This change would not add a compliance option or a new requirement, but would affect the way that trade-offs are made.
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
11CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Schedule: Key Dates
● Mar 2010 - Dec 2010● CEC develop foundation /methodology
● IOUs:● Conduct research, and cost effectiveness analysis
● Present results at stakeholder meetings
● Dec 2010● IOUs finalize code change proposals for submittal to CEC
● Feb 2011● CEC opens Rulemaking for Title 24, develop 45-day language
● June 15, 2011● Title 24 Adoption date
● Jan. 1, 2013● Title 24 Implementation date
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
12CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Process - Related CASE Topics for 2011 Title 24 Cycle
● Codes and Standards Enhancement (CASE)
Topics
● Water Heater Standby Losses
● Hot Water Temperature Reset
● Process Boilers
● Air Compressors
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
13CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
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Ground Rules
● For those attending by telephone/web● Please DO NOT place your phone on HOLD
● We do not want to hear your hold music
● Please mute your microphone, unless you want to speak● Ask questions/comment by “chat” or by voice● Call will drop at 12:30 – please hang up and re-dial in
● We want to hear your concerns● Opposing viewpoints are encouraged● We are seeking information, not resolution
● Time is limited● Raise your hand and be acknowledged by presenter● Clearly state your name and affiliation prior to speaking● Speak loudly for the people on the phone
● Minutes and presentation material will be available online – we will distribute link
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
14
California Statewide Utility Codes and Standards Program
Water Heater Standby Loss Stakeholder Meeting #1
Heschong Mahone Group, Inc.
May 25, 2010
May 25, 20102011 Title 24 CASE Process Update
15CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
15
Water Heater Standby Loss
● Summary of current code requirements
● Typical practice
● Summary of potential code change
proposals
● Initial data/findings
● Potential code change proposals
● Planned data collection and analysis
● Specific stakeholder requests
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
16CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
WH2 Standby Loss
Current Code Requirements
● Current Code Requirements● Title 24 water heater efficiency requirements follow federal standards, which preempt CA to have more stringent standards
● Standby stack heat loss in atmospheric combustion gas storage water heater is included in Energy Factor (EF)
● Changing market conditions● New federal regulations for residential water heaters were passed this year
● Residential water heaters– 20 to 100 gallon capacity
– Less than 75,000 Btu/hr input
– Efficiency measured by EF
● Commercial water heaters– Greater than 75,000 Btu/hr input
– Efficiency measured by Thermal Efficiency and Standby Loss
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
17CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
WH2 Standby Loss
Typical Practice
● Water heating represents more than 30% of total residential building energy use
● Single family homes in California typically use a 40 or 50 gallon natural draft gas water heater, more tankless water heaters are used
● Multi-family and hotel/motel buildings use commercial grade water heaters or boilers
● Other non-res buildings used a variety of water heaters based on hot water demand
● Gas water heaters with low standby loss● Forced draft water heaters
● Tankless water heaters
● Condensing water heaters
● Water heaters with integral flue damper
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
18CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
WH2 Standby Loss
Potential Code Change Proposals
● Require a flue damper to be installed as part of the flue exhaust system to reduce stack heat loss
● For both res. and non-res. buildings
● Availability of third-party flue dampers
● Feasibly of working with water heater controls
● Compliance options: high efficiency water heaters
● Require a 110V electric outlet to be installed in the water heater closet or near water heater in garage
● Require PVC exhaust pipe and condensate drain to be installed to accommodate forced draft or condensing water heaters
● Modify ACM to include the benefit of third party flue dampers
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
19CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
WH2 Standby Loss
Potential Code Change Proposals – Reach Code
● Require water heaters to be equipped
with flue dampers, or to be:
● Force draft type
● Tankless water heater
● Require water heaters to have standby
loss within limits that are equivalent to
those with integral flue dampers
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
20CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
WH2 Standby Loss
Initial Data / Findings – Energy Impact
● In a 40-gal WH, stack heat loss represents● ~43% of the total heat loss or
● 17% of total WH energy consumption
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
From a TANK simulation study performed by Peter Biermayer and Jim Lutz of LBNL
May 25, 20102011 Title 24 CASE Process Update
21CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
WH2 Standby Loss
Initial Data / Findings – Energy Savings
● ~24 Therms/year for a 40-gal water
heater
● EF = 0.60, RE = 0.78
● Flue damper effectiveness = 0.65
● Savings for commercial water heaters
depend on standby loss ratings
● ~30 Therms/year for a 100-gal 200kBtu
WH
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
22CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
WH2 Standby Loss
Initial Data / Findings – Availability & Feasibility
● Water heaters with integral flue dampers are
available
● Bradford White res models with 0.67 EF
● After market flue dampers are mostly for
boilers, where connections often already
exist for easy retrofits
● Installation feasibility
● Reliability of buoyancy driven flue dampers
● Need to connected to the ignition circuit
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
23CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
WH2 Standby Loss
Potential Code Change Proposals Update
● Section 113 mandatory requirements for all
buildings
● A 110V electric outlet to be installed in the water
heater closet or near water heater in garage
● PVC exhaust pipe and condensate drain to be
installed if natural gas stud is installed
● Modify Res and Non-Res ACM to include the
capability to calculate energy savings of
after market flue dampers
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
24CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
WH2 Standby Loss
Planned Data Collection and Analysis
● Coordinate with SEMPRA Emerging Technology Program to
● Identify flue damper products
● Perform flue damper test and energy savings analysis
● Analyze energy savings potential of flue dampers in multifamily applications
● Perform field study to evaluate effectiveness and energy savings of electric driven flue dampers in multifamily applications
● Investigate water heater models to develop ACM algorithms that capture flue damper savings
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
25CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
WH2 Standby Loss
Specific Stakeholder Requests
● After market flue damper products and costs (including installation costs)
● Technical information on flue damper effectiveness (savings, maintenance costs, etc.)
● Incremental costs of water heaters with flue dampers
● Installation costs of PVC exhaust pipes
● Product development plans
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
May 25, 20102011 Title 24 CASE Process Update
26CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
WH2 Standby Loss
QUESTIONS & COMMENTS
??
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
Yanda ZhangHeschong Mahone Group, Inc.Yanda.Zhang@h-m-g.com
27
California Statewide Utility Codes and Standards Program
Chilled and Hot Water Temperature Reset ControlsStakeholder Meeting #1
Taylor Engineering
May 25, 2010
May 25, 20102011 Title 24 CASE Process Update
28CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
2828
Chilled and Hot Water Temperature Reset Controls
Current Code Requirements and Proposed Change gray [delete] /underline [add]
● 144(j)1: “HVAC chilled and hot water pumping shall be designed for variable fluid flow…”
● “Chilled and Hot Water Temperature Reset Controls. Chilled and hot water systems with a design capacity exceeding 500,000 Btu/hr supplying chilled or heated water (or both) shall include controls that automatically reset supply water temperatures as a function of representative building loads or outside air temperature.
● EXCEPTION to Section 144(j)4: Hydronic Chilled water systems that use variable flow speed drives to reduce pumping energy in accordance with Section 144(j)1 144(j)6.”
● 144(j)6: CHW pumps over 5HP shall have VFDs…the pressure shall be reset by valve position.
May 25, 20102011 Title 24 CASE Process Update
29CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
2929
Chilled and Hot Water Temperature Reset Controls
History
● The CHW/HW temperature reset
controls have been in Title 24 since
2005
● The same requirements are in ASHRAE
90.1-2010
May 25, 20102011 Title 24 CASE Process Update
30CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
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Chilled and Hot Water Temperature Reset Controls
Rationale – Hot Water
● HW temperature reset always reduces boiler energy and piping losses and always reduces total energy, especially for condensing boilers
● HW temperature reset can increase HW pump energy if the pump has a VFD. (VFDs are not cost effective or required on hot water pumps). Even if the HW pump has a VFD, increasing HW pump energy decreases boiler energy (opposite of CHW pumps!) so HWST reset always makes sense
● Temperature reset is low/no cost – it requres a minor amount of programming but no additional hardware
May 25, 20102011 Title 24 CASE Process Update
31CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
3131
Chilled and Hot Water Temperature Reset Controls
Rationale – Chilled Water
● Variable flow is required on most CHW and HW systems
● VFDs are required on many CHW pumps but not on any HW pumps
● For CHW systems with VFDs the options are to reset pressure setpoint and/or temperature setpoint
● Resetting pressure will always reduce total energy but will not necessarily save as much energy as temperature reset
● The converse is not necessarily true: resetting temperature could increase total energy in some scenarios. This is why pressure reset is required but temperature reset is not required.
● For CHW systems without VFDs there is no pressure reset● Resetting the temperature will result in a tiny increase in pumpenergy for variable flow systems (pump rides out on curve) but will always reduce total energy due to reduced chiller lift
● The CHW exeption for variable flow was likely a mistake caused by 90.1 language that lumps variable flow and variable speed in the same section
May 25, 20102011 Title 24 CASE Process Update
32CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
3232
Chilled and Hot Water Temperature Reset Controls
Future CHW Reset Changes?
● Our recent analyses show that CHW temperature reset saves more than pressure reset unless the pump head is unusually high● Temperature reset is particularly important for waterside economizers
● We may want to:● Always require temperature reset and require pressure reset for high pump head
● Always require both (like air handlers)
● The users guide should discuss combined sequences
May 25, 20102011 Title 24 CASE Process Update
33CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
3333
Chilled and Hot Water Temperature Reset Controls
QUESTIONS & COMMENTS
??Jeff SteinTaylor EngineeringJStein@taylor-engineering.com
34
California Statewide Utility Codes and Standards Program
Process BoilersStakeholder Meeting #1
Portland Energy Conservation, Inc.
May 25, 2010
May 25, 20102011 Title 24 CASE Process Update
35CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
3535
Process Boilers
Current Code Requirements
● Title 24 historically has not regulated process loads
● Process boilers regulated if also serving domestic hot water or space heating
May 25, 20102011 Title 24 CASE Process Update
36CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
3636
Process Boilers
Potential Code Change Proposals
● Code change options (mandatory)
● Flue damper
● Electronic parallel positioning control
● Electronic parallel positioning with oxygen trim control
● Variable frequency drive on combustion air fan
May 25, 20102011 Title 24 CASE Process Update
37CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
3737
Process Boilers
Planned Data Collection and Analysis
● Determine effect of new air quality regulations on measures
● Rough estimates of energy savings via spreadsheet
● Determine energy savings via field monitoring and analysis
● Determine incremental measure costs
May 25, 20102011 Title 24 CASE Process Update
38CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
3838
Process Boilers
New Air Quality Regulations
● At least 3 air districts have recently adopted more stringent NOx regulations
● Bay Area
● 5-20 MMBtuh/hr: 15 ppm (7/2008)
● 20-75 MMBtu/hr: 9 ppm
● San Joaquin Valley
● 5-20 MMBtu/hr: 9/6 ppm (2012/2014)
● >20 MMBtu/hr: 7/5 ppm (2010/2014)
● South Coast
● 5-75 MMBtu/hr: 9 ppm (1/2013)
May 25, 20102011 Title 24 CASE Process Update
39CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
3939
Process Boilers
New Air Quality Regulations
● At least 3 air districts have recently adopted more stringent NOx
regulations
● Represents 75% of California installations
● (Payroll, # businesses as proxy)
● Driven by ozone standard non-attainment
May 25, 20102011 Title 24 CASE Process Update
40CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
4040
Process Boilers
California Air Districts
May 25, 20102011 Title 24 CASE Process Update
41CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
4141
Process Boilers
California Nonattainment Area Classification: Ozone 1-hour Standard
May 25, 20102011 Title 24 CASE Process Update
42CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
4242
Process Boilers
Compliance Methods for Air Quality Regs
● Pay a fine instead of complying
● Replace the entire boiler
● Selective catalytic reduction
● Ultra low NOx burner
● Forced draft
● Parallel positioning controls
May 25, 20102011 Title 24 CASE Process Update
43CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
4343
Process Boilers
Energy Savings Estimates
● Boiler permits for new installations and replacements
● NOx regs apply to specific ranges of boiler sizes
● Knowing the sizes of new boilers by hear, then the # installed by NOx level
● 20% of boilers serve both a process + space heating/DHW load
● 71% of boilers are low NOx or ultra low NOx burners and thus come with PP controls
● 75% load factor
● 330o F stack temperature
● 6-7% O2 setpoint for typical boiler installation
● 5% O2 setpoint (PP) and 3% (O2 trim)
May 25, 20102011 Title 24 CASE Process Update
44CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
4444
Process Boilers
Energy Savings Estimates
Measure Low High Low High
Flue Damper 1,845 6,341 $1,107 $3,805
Parallel Positioning 110,349 277,934 $66,209 $166,760
Parallel Positioning plus O2 Control 327,821 495,406 $196,693 $297,243
Combustion Fan VFD 1,076,893 2,153,786 $161,534 $323,068
Assumed Energy Costs
Natural Gas $0.60 /therm
Electricity $0.15 /kWh
Energy Savings Estimate
therms/yr
Cost Savings Estimate
($/yr)
kWh/yr $/yr
May 25, 20102011 Title 24 CASE Process Update
45CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
4545
Process Boilers
Specific Stakeholder Requests
● Cost information for each measure
● Recruiting sites for field tests
May 25, 20102011 Title 24 CASE Process Update
46CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
4646
Process Boilers
QUESTIONS & COMMENTS
??Matt TylerPECImtyler@peci.org
May 25, 20102011 Title 24 CASE Process Update
47CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
47
LUNCH BREAK
Process Air Compressors, Boilers, and Water Heaters:
Title 24 Stakeholder Meeting #1
Conference Call Will Resume At 1:00
please hang up and re-dial the same number:Dial-in Number: 1-702-835-5019
Participant Access Code: 61316#
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
48
California Statewide Utility Codes and Standards Program
Air Compressors Stakeholder Meeting #1
Energy Solutions
May 25, 2010
May 25, 20102011 Title 24 CASE Process Update
49CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
494949
Air Compressors
● Summary of current code requirements
● Summary of potential code change
proposals
● Typical practice
● Initial data/findings
● Potential code change proposals
● Planned data collection and analysis
● Specific stakeholder requests
May 25, 20102011 Title 24 CASE Process Update
50CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
5050
Air Compressors
Current Code Requirements – Title 24
● Process loads, including compressed air systems, are excluded in Title 24 2008
● Defined by Title 24 as: an activity or treatment that is not related to the space conditioning, lighting, service water heating or ventilating of a
building as it relates to human occupancy
May 25, 20102011 Title 24 CASE Process Update
51CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
5151
Air Compressors
Potential Code Change Proposals
● Performance metric or set of system
design guidelines for compressed air
systems
● Requirements for smart system
controls on multi-compressor systems
May 25, 20102011 Title 24 CASE Process Update
52CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
5252
Air Compressors
Typical Practice
● Multi-compressor systems are common● (>80% of systems in PG&E Territory)
● Running 80+ hours/week, often at part load conditions
● System-wide efficiency not always considered
● Existing systems may be pieced together over time
● Controls often applied at individual compressor, not system level
● System modifications may be perceived as a risk to system reliability
May 25, 20102011 Title 24 CASE Process Update
53CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
5353
Air Compressors
Initial Data / Findings
● DOE Industrial Assessment Centers
Audits of small- to medium-sized
industrial facilities
● Average projected system savings of 15%
with <2 year payback
● Many case studies identify savings in
range of 30-60%
May 25, 20102011 Title 24 CASE Process Update
54CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
5454
Air Compressors
Potential Code Change Proposals
● Performance metric or set of system
design guidelines for compressed air
systems
● Consider sizing and choice of
compressors, storage tanks, and other
system components
● System layout considerations
● Distribution system considerations
● Leak prevention and detection
May 25, 20102011 Title 24 CASE Process Update
55CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
5555
Air Compressors
Potential Code Change Proposals
● Require smart controls on multi-
compressor systems
● Monitor system demand and choose the
most appropriate combination of
compressors to meet the current load
May 25, 20102011 Title 24 CASE Process Update
56CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
5656
Air Compressors
Planned Data Collection and Analysis
● Identify system design and sizing guidelines
and control options that can be
incorporated into Title 24
● Energy savings and cost analysis for
proposed options
● Evaluate energy savings using AirMaster+
May 25, 20102011 Title 24 CASE Process Update
57CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
5757
Air Compressors
Specific Stakeholder Requests
● Current design practices
● Pricing information
● Exceptions or issues with requiring controls
on system modifications
● Individuals or groups who might be able to
provide additional input
May 25, 20102011 Title 24 CASE Process Update
58CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM
CA Utilities 2011 Title 24 Stakeholder Meeting for Proposed Code Changes
5858
Air Compressors
QUESTIONS & COMMENTS
??Megan Johnson Energy Solutionsmjohnson@energy-solution.com510-550-8501
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