Understanding, Delivering and Validating Building Performance
Dr Kerry J Mashford, Chief Executive, National Energy Foundation
CPA Networking Forum, 12th February 2013
Improving the use of energy in buildings
The National Energy Foundation (NEF)
• Charitable Foundation Formed in 1988 – 25 years old
• Established first European Domestic Energy Rating System (NHER) in 1990
• Primary Objective – Improving the use of energy in buildings
• Outcome focussed
NEF – Who are we today?
• Everything we do contributes to our objective to improve the use of energy in buildings
• Provide services for public and private sector to help reduce energy use and reduce carbon emissions, for domestic and non-domestic buildings, be they new or existing
• Focus on energy efficiency and sustainable energy• Work by to:
• Inspiring action by individuals, organisations and communities• Building capacity and capability• Advancing knowledge• Provide robust tools and advice to help close the Performance Gap
• Most projects in UK, but some in Europe/Asia
• Work in partnership with Energy Efficiency Partnership for Buildings (EEPB) which is now a subsidiary of NEF
NEF work in performance & closing the performance gap
• Field trials, engagement, technical assessment
• Process issues with installation, use etc. – root
cause analysis
• Stock modelling and portfolio planning
• Different scales, points in lifecycle run research
and investigation projects, information
programmes, policy investigation and advice.
“In theory, theory and practice are the same……
…..in practice, they aren’t”
Understanding the
Performance Gap
When does assured performance succeed or fail?
Hand over &
use
Procurement &
Construction
Testing &
Com
missioning
Design &
Planning
Briefing &
Specification
Technology Strategy Board - Building Performance Evaluation Programme
• New-build domestic and new-build + refurbished
non-domestic
• Over 100 projects
• Studies at • completion, handover and early occupation
• in-use – 2 years
• Benefits to study building, future buildings,
building and refurb delivery process
Building Performance Evaluation Programme – non-dom by sector
Credit: Technology Strategy Board
Building Performance Evaluation Programme –domestic by structure
• Total number of dwellings in the programme is 366, • Represents developments with a total of 3989 dwellings
= equating to a 9% assessment of all developments.
Credit: Technology Strategy Board
Outputs from TSB BPE programme
Emerging themes
• Commissioning
• Sub-meters and
reconciliation
• BMS
• Controls / complexity
• Lighting – too much
and inability to
control
• Fabric performance
• MVHR systems
Current analysis• Production of ~8 case studies
• Overview of the BPE programme building
portfolio
• Non-domestic Initial Studies – summary
report
• Early learning from non-domestic projects
• Industry capability, costs and appetite for
BPE
• Seeking the best strategy for low carbon
homes
• Meta-study of MVHR systems in new
housing
Mat Colmer – Lead TechnologistCredit: Technology Strategy Board
Delivering Performance
Improvement
• New buildTSB BPE - individual studies, Evaluator support, generic
learning
Design specification, test and inspection guidance
• Retrofit and RefurbishmentGreen Deal GDPG – making the Green Deal deliverable
Re:Start Local – local SME retrofit supply chain
Green Deal Pioneer Places – early uptake
SuperHomes – open days planned for March
Non-domestic green deal surveys
Whiscers – IWI solution (with SEA)
• Performance in practice – field trials etc.• Communal heating scheme study
• Energy use feedback impact study – individual & community
• Ground Source Heat Pump Association
• Carbon Trust Standard
• Corporate carbon footprinting
• EEPB• Windows, doors and conservatories
• Microgeneration specific SAP
WHISCERS – partnership with SEA
1. A 3D laser scanner measures the internal dimensions of a room. The digital data is then downloaded to an off-site cutting machine.
2. The machine cuts the insulation boards with great accuracy. Software optimises the cut to minimise wastage.
3. The boards are delivered to site as a kit and are then fitted to the walls with the minimum of noise, mess and disruption.
WHISCERS - Benefits
• Developed with residents in mind: speedy process that
minimises mess and disruption in the home.
• Accuracy of measurement: high accuracy laser scanning
• Speed of measurement: the dimensions of a typical wall can
be collated in 10 minutes c.f. 30 minutes by traditional methods -
typical three bedroom house surveyed in 60 to 90 minutes.
• Automated, off-site cutting using a CNC cutting machine:
little mess in the home, greater accuracy and lower material
costs than hand-cutting. Less material waste.
• Faster Installation: boards arrive on site and can generally be
fitted in 90 minutes per room or less, with lower labour costs.
• Residents can remain at home: Less disruption, no relocation
costs, minimum noise, mess and faster process.
WHISCERS - Benefits
• WHISCERS™ is a win, win solution for housing providers
and residents for transforming hard-to-treat properties
into easy-to-heat homes.
• 2011: Inside Housing Innovation Award; and the Energy
Institute Innovation Award.
• 2012: 'Building Fabric of the Year' category at the Retro
Expo Awards 2012. The judges commented: "The system
demonstrated great process innovation with high potential
impact".
Post refurbishment monitoring being undertaken part of TSB
R4tF project and planned for Eracobuild project
Validating Assured
Performance
Performance cycle
Measure & monitor
Compare & quantify
Implement response
Devise response
Root cause analysis
Four application areas for BPE
• Validate and debug a newly delivered building (or newly
refurbished building) - ≈ 10- 30% energy saving
• Establish the performance of a building prior to
refurbishment and inform investment decisions – greater
energy savings per £ invested
• Track and inform continuous improvement of existing
buildings as an FM process – avoid rising energy demand –
(+0 >energy demand >- 3%)
• In a product development cycle where the product is a
particular building type, model or element – performance
confidence, reduce risk
Building an Evidence Base
Measure & monitor
Compare & quantify
Implement response
Devise response
Root cause analysis
Understand measurement & monitoring protocols and reporting methodologies
Tailored benchmarking & performance databases
Really unpick the reasons for prediction and practice being different
Report findings and share knowledge
Need to address the cause not the symptom
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