Photovoltaic Module Energy Rating Procedure: Final Subcontract ...
House Energy Rating Tools - UniSA · • Whole of house . energy • Whole of house + renewables....
Transcript of House Energy Rating Tools - UniSA · • Whole of house . energy • Whole of house + renewables....
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House Energy Rating ToolsStephen WhiteSeptember 2016
ENERGY TECHNOLOGY
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The communication landscapeM
arket BasedReg
ulat
ory
Disclosure (benchmarking)
• CEMP• Victorian Energy
Efficiency Scorecard• BASIX
Channel Mobilisation
• Liveability• Builders?
• GreenSmart• Other?
Consumer marketing
• Build4Life• Sustainable
House Day
NCC• DTS – NatHERS• BASIX• Performance
• EnergyPlus• etc
• Consumer protection focus (avoiding hidden costs and market failures)
• Communicating technical requirements for implementation by suppliers
• Consumer awareness focus (providing choice)
• Communicating features and lifestyle benefits to consumers
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Applications
• Design Rating (new build or existing)• Building fabric heat load• Whole of house energy• Whole of house + renewables energy
• Design business case evaluation/ Audit
• Operational Rating Benchmark actual energy
consumption against agreed levels of goodness
Compare predicted consumption under
“normal”, “standardized” usage patterns
Andconsistent methodology/
tools
Predict what you might save in your circumstances. Is the investment worth it?
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Confound those humans
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Summary of Key PEEC Building Rating Schemes
Success Factors• Robustness:
• Accuracy/ validity• Reproducible• Scaled results• Optionality• Actionable outputs
• Implementable• Cost• Training• Accessibility
• Incentive for use• Revenue stream• Enforcement• Communication
IPEEC, 2014
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How complicated does this have to be?Thirty four calculators tried, mostly Australian. • 8 Basic energy calculators
– All 8 gave reasonable results– All 8 were easy to use– Many of the calculators were for specific regions, 6 calculators provided advice
• 11 Detailed energy calculators– 2 of 11 gave reasonable results for energy and GHG, there was no consistency for cost– 1 of 11 resolved individual consumption patterns reasonably well– 7 of 11 were easy to use - 1 was outstanding– 2 of 11 provided advice that had impact, and was relevant and safe
• 6 Carbon footprint calculators– 2 of 6 gave reasonable values– 3 of 6 easy to use and interpret– All the inaccuracies were due to unrealistic or inconsistent assumptions (examples)
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Why NatHERS for the NCC?
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So in practice (>400 houses)….Hence > 70% of Australian houses are designed with NatHERS software
Less than 5 stars More than 5 stars
Bris Adel Melb Bris Adel Melb
External Wall insulation $249 $905 $925 $245 $993 $1,120
Internal Wall Insulation $40 $244 $141 $55 $350 $138
Ceiling/Roof Insulation $1,718 $1,727 $1,718 $1,669 $1,748 $1,942
Single Glazed Windows $14,245 $12,897 $13,784 $11,736 $10,233 $10,325
Double Glazed Windows $350 $121 $400 $0 $774 $2,242
External Walls $27,510 $30,679 $30,250 $22,933 $26,765 $26,407
Total Cost $44,113 $46,575 $47,217 $36,638 $40,864 $42,173
Difference −$7,475 −$5,711 −$5,045
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1. Ongoing validation
2. Incorporating new building products/materials
3. Analysing design trends, spot dodgy designs
4. Data entry improvements and simplifications
5. Incremental science development
Research needs
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1. Validation of software algorithms• CSIRO BESTEST
(2004)• Uni Newcastle 3 x
test houses (2005) • Deakin University 3x
Darwin Homes (2006)
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1. Validation of assumptions
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Heating demand is more sensitive to star rating(with current weather files and user behaviour assumptions)
? Should we split the two? What is the impact on heat stress
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2. New products and techniques
Windows, skylights
Materials• Phase change plasterboard• Limestone
Solar chimneys
Ground modelling, underfloor, reflective foil
Automated ventilation
........
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Adding appliances for energy use prediction
Thermal HVACHot Water Lighting Appliances
AccuRate
AccuRateSustainability
AusZEH Design (Lite & Heavy)
Occupancy GenerationEmbedded
Carbon
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CSIRO Zero Energy HouseComparison between actual and AusZEH design
0500
100015002000250030003500400045005000
Elec
tric
ity c
onsu
mpt
ion
(kW
h) ActualModel
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0
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2
3
4
5
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Ener
gy c
onsu
mpt
ion
(kW
h)
Hour
MonitoredModelled
Continued
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Ratings for existing homes(Like a dishwasher…)
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People say they want it• 92% would like energy
efficiency information as part of sale and lease processes
• 89% reported that an energy efficient home would be more attractive to buy or rent
• 56% would be willing to pay for energy efficiency information (44% would pay up to $250)
• 92% would like energy efficiency information in building inspection reports, 83% at house inspections and 72% in home sale/rental advertising
Telephone survey of home owners and renters n = 866
RP1019 Comfort Index
Thermal Daylight IAQ Acoustic
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Business Model
Required information
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RP1024 Next Generation Rating Tools Market BasedR
egul
ator
y
Disclosure (benchmarking)
• CEMP• Victorian Energy
Efficiency Scorecard• BASIX
Channel Mobilisation
• Liveability• Builders?
• GreenSmart• Other?
Consumer marketing
• Build4Life• Sustainable
House Day
NCC• DTS – NatHERS• BASIX• Performance
• EnergyPlus• etc
Data Lifestyle: Support consumer awareness of comfort, health and affordability benefits
Markets: Increase the value of high performance houses Environment: Reduce greenhouse gas emissions
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ENERGY TECHNOLOGY
Thank youEnergy TechnologyStephen WhiteGeneral try hardt +61 2 4960 6070e [email protected] www.csiro.au/lorem