Passive House slideshow for Passive House MinnTE Studio
This is an introductory slideshow about the Passive House building energy standard that I gave at the Passive House Minnesota event in Miinneapolis on 2/3/2011.
The slideshow contains a lot of full-screen images but no subtitles, therefore omitting some of the information which would have been given verbally during the presentation.
Passive House
Designing Low Energy Buildings
A presentation by Katrin Klingenberg, Executive Director Passive House Institute US | PHIUS
www.passivehouse.us
Keynote address at the Columbus Green Building Forum's 2011 Green Building EXPO
Is your monthly energy bill too expensive? Discover the tools available to help you manage your homes energy consumption, reduce your energy bills, and save money. This course will cover the economics of energy efficiency, how to pair an efficient home with distributed generation and how these actions will benefit your pocketbook.
Passive House slideshow for Passive House MinnTE Studio
This is an introductory slideshow about the Passive House building energy standard that I gave at the Passive House Minnesota event in Miinneapolis on 2/3/2011.
The slideshow contains a lot of full-screen images but no subtitles, therefore omitting some of the information which would have been given verbally during the presentation.
Passive House
Designing Low Energy Buildings
A presentation by Katrin Klingenberg, Executive Director Passive House Institute US | PHIUS
www.passivehouse.us
Keynote address at the Columbus Green Building Forum's 2011 Green Building EXPO
Is your monthly energy bill too expensive? Discover the tools available to help you manage your homes energy consumption, reduce your energy bills, and save money. This course will cover the economics of energy efficiency, how to pair an efficient home with distributed generation and how these actions will benefit your pocketbook.
Renewable Portfolio Standard: a State by State Analysis of the future of the ...bernhardbaumgartner
A State by State analysis of the advancement of the RPS and the future of the solar industry.
Key figures: cost of electricity, breakdown of electricity consumption, RPS targets...
Renewable and low carbon energy capacity study for the East of Englandcrifcambs
Richard Summers from The Landscape Partnership and Andrew Turton from AECOM shared their findings from work commissioned by the Department for Energy and Climate Change (DECC) to identify the potential for renewable energy in the East of England. This study highlighted the renewable energy resources for Cambridgeshire.
Presented to Councillors on 28 September 2011.
Since our inception is in year 2006, we “A Pankaj Kale Company” is a trustworthy firm engaged in manufacturing, supplying and trading a comprehensive assortment of LED Lights & Printing Pest Ink. Our offered range encompasses of Office LED Lights, LED Shop Lights, Residential Led Lights, Industrial LED Lights, LED Street Lights, Commercial LED Lights, Printing Press Ink and LED Lights. The products offered by us are manufactured using optimum-grade raw material And other basic components that are obtained from accredited and trustworthy vendors of the market. These products offered by us are widely appreciated in the market for their features like brightness, perfect light distribution, long life span, compact design, directional lightning, energy efficient, requires low maintenance, alluring designs, high reliability, lightweight, user friendly, outstanding performance, technically advanced and bright illumination properties.
Blake Lapthorn Green Breakfast with guest speaker Philip Wolfe, Director of W...Blake Morgan
Blake Lapthorn welcomed Philip Wolfe, Director of Westmill Solar Co-operative and Nicola McConville, Partner, Blake Lapthorn to its Oxford Green Breakfast on 7 November 2012.
Renewable Portfolio Standard: a State by State Analysis of the future of the ...bernhardbaumgartner
A State by State analysis of the advancement of the RPS and the future of the solar industry.
Key figures: cost of electricity, breakdown of electricity consumption, RPS targets...
Renewable and low carbon energy capacity study for the East of Englandcrifcambs
Richard Summers from The Landscape Partnership and Andrew Turton from AECOM shared their findings from work commissioned by the Department for Energy and Climate Change (DECC) to identify the potential for renewable energy in the East of England. This study highlighted the renewable energy resources for Cambridgeshire.
Presented to Councillors on 28 September 2011.
Since our inception is in year 2006, we “A Pankaj Kale Company” is a trustworthy firm engaged in manufacturing, supplying and trading a comprehensive assortment of LED Lights & Printing Pest Ink. Our offered range encompasses of Office LED Lights, LED Shop Lights, Residential Led Lights, Industrial LED Lights, LED Street Lights, Commercial LED Lights, Printing Press Ink and LED Lights. The products offered by us are manufactured using optimum-grade raw material And other basic components that are obtained from accredited and trustworthy vendors of the market. These products offered by us are widely appreciated in the market for their features like brightness, perfect light distribution, long life span, compact design, directional lightning, energy efficient, requires low maintenance, alluring designs, high reliability, lightweight, user friendly, outstanding performance, technically advanced and bright illumination properties.
Blake Lapthorn Green Breakfast with guest speaker Philip Wolfe, Director of W...Blake Morgan
Blake Lapthorn welcomed Philip Wolfe, Director of Westmill Solar Co-operative and Nicola McConville, Partner, Blake Lapthorn to its Oxford Green Breakfast on 7 November 2012.
Deze presentatie is tijdens de beurs Gevel 2012 gegeven door onze internationale BIPV specialist, Johan van Dormael.
Alle oplossingen die Sapa Building System kan bieden komen in deze presentatie naar voor.
Heeft u vragen kan u altijd vrijblijvend contact opnemen!
Window Standards Compared: NFRC, ISO and Passive House RatingsRDH Building Science
This slide deck was presented by Brittany Hanham at Passive House North Conference 2013.
Outline:
- North American and Passive House window rating systems
- Example simulation results
- What this means and things to be aware of
A one day symposium on zero/low carbon sustainable homes took place at The University of Nottingham on the 24th October, 2012. The event offered professionals within the construction industry a unique opportunity to gain added and significant insight into the innovations, policies and legislation which are driving the construction of zero/low carbon energy efficient homes both here in the UK and elsewhere in Europe. It explored solutions to sustainability issues “beyond” the zero carbon agenda. BZCH followed on from the successful ‘Towards Zero Carbon Housing’ symposium the University hosted in 2007. This event is part of the Europe Wide Ten Act10n project which is supported by the European Commission Intelligent Energy Europe.
Dr Ioannis Pappas, CEO of Green Evolution SA and Secretary of the Hellenic Passive House Institute gave a presentation on the geothermal heat pump applications for low energy buildings: the case of Passive House. In this presentation, a thorough survey of applications for passive cooling in Mediterranean climate was given, together with examples of passive houses around the Mediterranean area.
How to evaluate daylight in low energy and nZEB buildings. Solar shadings needs to be takne into account as dynamic shadings are used for up to 80% of the time.
Stefano Pili and Emanuela Abis on "Defining a Spatial Decision Support System for integrating building energy efficiency in urban policy decision-making"
The International Energy Agency’s annual benchmark for tracking energy investment, World Energy Investment 2019 provides a full picture of today’s capital flows and what they might mean for tomorrow’s energy sector. It assesses whether the frameworks and strategies put in place by governments, the energy industry, and financial institutions are spurring timely investment, and how spending across sectors and technologies matches with the world’s energy security and sustainability needs.
Dr Fatih Birol, Executive Director of the International Energy Agency, spoke at the EU-US Business to Business Energy Forum in Brussels on May 2, 2019, about the global LNG trade.
his webinar presented the most recent findings from IEA’s Energy Efficiency Market Report 2018, featuring:
- The Efficient World Scenario: What would happen by 2040 if countries realised all the economically viable energy efficiency potential that is available today?
- The Efficient World Strategy: The policies, technologies and strategies for achieving an Efficient World exist today. Global experiences point the way.
- Special focus on South Africa and other emerging economies: highlights, progress, and potential.
- Findings on the current rate of progress on improving energy efficiency, and historic and current trends.
The webinar was organised by the South African Department of Energy’s Energy Efficiency Initiatives Directorate and the International Energy Agency, and is presented by Joe Ritchie, Energy Policy Analyst at the IEA and report coordinator.
This webinar focused on where we are today and how we could achieve key energy-related sustainable developments goals on climate change; air quality and universal access to modern energy.
This webinar covers the most recent findings from IEA’s Energy Efficiency Market Report 2018, featuring the Efficiency World Scenario, the Efficient World Strategy, and a special focus on Brazil and Mexico. It includes a discussion on the current rate of progress on improving energy efficiency, as well as historic and current trends. The webinar was organised in cooperation with the Brazilian Ministry of Mines and Energy (MME), Energy Research Office (EPE) and the Mexican Ministry of Energy (SENER), and presented by Joe Ritchie and Edith Bayer.
This webinar covers the most recent findings from IEA’s Energy Efficiency Market Report 2018, featuring the Efficiency World Scenario, the Efficient World Strategy, and a special focus on Brazil and Mexico. It includes a discussion on the current rate of progress on improving energy efficiency, as well as historic and current trends. The webinar was organised in cooperation with the Brazilian Ministry of Mines and Energy (MME), Energy Research Office (EPE) and the Mexican Ministry of Energy (SENER), and presented by Joe Ritchie and Edith Bayer.
This webinar covers the most recent findings from IEA’s Energy Efficiency Market Report 2018, featuring the Efficiency World Scenario, the Efficient World Strategy, and a special focus on Brazil and Mexico. It includes a discussion on the current rate of progress on improving energy efficiency, as well as historic and current trends. The webinar was organised in cooperation with the Brazilian Ministry of Mines and Energy (MME), Energy Research Office (EPE) and the Mexican Ministry of Energy (SENER), and presented by Joe Ritchie and Edith Bayer.
What do changing energy dynamics mean for the world’s largest oil and gas exporters? A new special report, part of the IEA’s flagship World Energy Outlook series, focuses on six key producers, Iraq, Nigeria, Russia, Saudi Arabia, United Arab Emirates & Venezuela, and examines the pressures that they face in different price and policy scenarios to 2040. The drive for energy efficiency and the long-term response to climate change, in addition to technology innovation and the shale revolution, all point to sustained pressure on economies that rely heavily on revenue from oil and gas.
Dr. Fatih Birol, the Executive Director of the International Energy Agency, gave a talk at Imperial College London on 20 March 2018 to discus how new technologies - including electrification & digitalisation – create opportunities, but also risks & uncertainty.
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
zkStudyClub - Reef: Fast Succinct Non-Interactive Zero-Knowledge Regex ProofsAlex Pruden
This paper presents Reef, a system for generating publicly verifiable succinct non-interactive zero-knowledge proofs that a committed document matches or does not match a regular expression. We describe applications such as proving the strength of passwords, the provenance of email despite redactions, the validity of oblivious DNS queries, and the existence of mutations in DNA. Reef supports the Perl Compatible Regular Expression syntax, including wildcards, alternation, ranges, capture groups, Kleene star, negations, and lookarounds. Reef introduces a new type of automata, Skipping Alternating Finite Automata (SAFA), that skips irrelevant parts of a document when producing proofs without undermining soundness, and instantiates SAFA with a lookup argument. Our experimental evaluation confirms that Reef can generate proofs for documents with 32M characters; the proofs are small and cheap to verify (under a second).
Paper: https://eprint.iacr.org/2023/1886
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Alt. GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using ...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Generative AI Deep Dive: Advancing from Proof of Concept to ProductionAggregage
Join Maher Hanafi, VP of Engineering at Betterworks, in this new session where he'll share a practical framework to transform Gen AI prototypes into impactful products! He'll delve into the complexities of data collection and management, model selection and optimization, and ensuring security, scalability, and responsible use.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
Essentials of Automations: The Art of Triggers and Actions in FME
Windows and glazed area technologies and materials in Europe
1. Windows and glazed area
technologies and materials in
Europe
Bertrand Cazes
IEA - Building Envelope Technologies and Policies Workshop – 17 Nov 2011
2. About Glass for Europe
• 4 member companies and 1associate:
• Run 58 of the 67 float lines based in the EU & EU
candidate countries
• Above 90% of the EU production In association with:
• Flat glass:
• Primarily building, automotive & solar-energy glass
• Also furnitures, electronics, appliances
• Supporter of building energy-efficiency
2
3. The myths to abandon
‘Windows are weak points in the
building envelopes’
No longer true!
‘This is the house of the future’
Really efficient? Really the
comfortable living space
expected?
3
4. Properties of windows
Energy efficiency of windows is the balance
between heat loss and solar heat gain
Low E coatings are
transparent to solar
radiation:
Increase of solar Heat
Energy balance: gain: g value
a x Ug – b x g
Low E coatings
stop exchange by
radiation:
Reduction of Heat
Loss: Ug value
4
5. A new energy-efficiency picture
Ability to capture free solar heat gain is unique
High performance windows could soon become
energy positive
4.0
ENERGY BALANCE in W/m²K
3.0
Energy balance of
glazing: a x Ug – b x g
2.0
1.0 Floor for any
opaque fabric
0
Yesterday Today… Today… Tomorrow
or just before or Positive Energy Balance
just after
-1
Yesterday Today… Today… Tomorrow
or just before or just after 5
6. The sound policy basis
UK – Window Energy Rating scheme
Providing easily understandable information to consumers on the
energy performance of products, expressed by way of labeling.
From Labels valuing
to
Insulation focus Energy efficiency WERs in UK:
Uw gw Uw gw WERs
1.17 0.32 TGU #1 TGU #2 1.25 0.40 A
1.25 0.40 TGU #2 DGU #3
1.53 0.45 B
1.39 0.32 DGU #1 DGU #2 or TGU #1 1.17 0.32
C
1.46 0.40 DGU #2 DGU #1 1.46 0.40
1.53 0.45 DGU #3 1.39 0.32 D
…by shifting strongly
focus from insulation
to energy balance
No longer about the sole U value but the energy balance
Same principles in Denmark, Finland, Czech Republic and Slovakia 6
8. Impact of the orientation
• Orientation primarily impact solar heat gains
• Triple Glazed units with high solar factor can be more
energy efficient than walls, even in the North orientations
Solar Heat Gain +115 +69 +49 0
Heat Loss - 56 - 56 - 56 - 10
Energy Balance + 59 +13 -7 - 10
kWh/m²
Triple glazed Unit in Salzbourg Wall:
Ug = 0.6W/m²K & g = 0,60 U = 0.12W/m²K
8
9. Climates in the equation
UK Rating Method based on energy
balance between losses and gains:
Energy Index = 218.6 gw – 68.5 (Uw + L50)
Energy index: energy
saved or lost by the window 218.6: fractions to reflect
Level E index the solar heat gains based
A >0
gw: solar factor of the window B -10 TO <0
on climatic conditions
(glass fraction * glass solar C -20 to < -10
D -30 to < -20
factor) E -50 to < -30 68.5: fractions to reflect the
F -70 to < -50 heat losses based on
Uw: U value of the window G < -70
climatic conditions
calculated by BFRC Certified
Simulators (EN 10077-2)
L50: effective heat loss due Fomulae adapted to
to air penetration. countries’ climatic conditions
10. WER systems in Europe
SWEDEN
Based on Uw values only
A if Uw = 0.9W/m²K FINLAND
G if Uw = 1.5W/m²K
Eref = 140 * uw – 160 * gw + 50 * L
A if Eref < 85 kWh/m²
G if Eref ≥ 185 kWh/m²
DENMARK
Eref= 196,4 * gw – 90,36 * Uw
A if Eref > 0 kWh/m² CZECH REP.
C if -17 > Eref ≥ -34 kWh/m²
MINI Band C compulsory Eref= 282.4 * gw – 98.7 * (Uw +Lw)
A if Eref > 0 kWh/m²
G if Eref < -100 kWh/m²
UK
Eref= 218 * gw – 68.5 * (Uw + L50) SLOVAKIA
A if Eref > 0 kWh/m² Eref= 266.6 * gw – 96.6 * (Uw +Lw)
G if Eref < -70 kWh/m²
A if Eref > 0 kWh/m²
MINI Band C compulsory
G if Eref < -100 kWh/m²
FRANCE
Under development
3 zones based on energy
consumption of the building
When WER is developped
SPAIN based on energy balance, it
Under development
Takes into account energy for
ITALY
Under development
is adapted to local realities!
heating and cooling
Will be the first with limitation on 10
solar factor
11. Variances & refinement possible
NFRC certification of the U-Factor &
Solar Heat Gain Coefficient (SHGC)
Levels must meet or exceed the
minimum qualification criteria
Proposal for a labeling Labeling under
of windows development
• Based on the global energy
• Likely to include limitation on solar
consumption of the building (both U
factor to avoid heat build-up in
and g values for windows)
summer
• Three climatic zones
• Solar-control glass may provide
• Indication of summer comfort the best energy balance.
(prevention of over-heating). 11
12. Solar heat gains to be optimized
TOMORROW?
50
Hamburg
ENERGY CONSUMPTION
45
in kWh/m² year
Brussels
40
London
35
3
0
0% 10% 20% 30% 40% 50%
PERCENTAGE OF GLAZED
TODAY SURFACE PER FLOOR SURFACE
In most climates enlarging size of performing
windows helps to reduce energy consumption
13. Glazing areas can be increased
100 100
90
Energy consumption (heating)
Daylighting Autonomy (%)
95 80
70
90 60
kW/m²/an
50
85 40
Conso 30
(kWh/m²/an)
80 20
DA300 (%)
10
75 0
Ratio: Glazed surface 30 living surface
0 10 20
on 40 50
(%)
VELUX software
DA = % of the day (8-18h), during which the natural light in
the house is higher than 300 LUX.
For indication, in France, new residential buildings must
have a minimum glazed surface of 18%.
This is still very far below the optimum for energy
efficiency AND natural daylight! 13
14. Way to reduce artificial lighting
• As buildings become more efficient, lighting
becomes the most important consumer of
energy in buildings
• Electricity remains one of the most carbon
intensive form of energy
• Regulatory requirements and standards:
• EU EPBD directive: Nearly Zero Energy Buildings - to
become the norm as of 2020 - lighting included in energy
demand (office buildings).
• Passive Haus: electricity for lighting and appliances have
to be minimised (German standard)
• Proposal for a criterion on ‘daylight availability’ for the
EU Ecolabel for office buildings
• Active House: daylight factor > 5% on average
• Need to envisage criterion on daylight autonomy
Easiest answer is Daylight thanks to glazed areas
15. Conclusion
Hopefully, the myths are dead!
It’s time to build differently with a holistic
energy balance approach
• Energy efficiency of windows must take into
account thermal losses AND solar heat gains
• Calculation should be based on a robust methodology
• Different climatic conditions with direct impact on energy
consumption of the building.
• Artificial lighting through Daylighting autonomy should be part of
the energetic performance of the window
• NEXT STEP: properly take account of the orientation and size of
windows in addition to the location
15
16. Thank you!
Bertrand Cazes
info@glassforeurope.com
www.glassforeurope.com
IEA - Building Envelope Technologies and Policies Workshop – 17 Nov 2011
18. Australia’s WER scheme
Also based on Uw and gw for heating and
cooling
• Energy consumption modelling of three
different size houses equipped with 17
windows using Accurate software
• Energy performance of the window is
expressed using a 5 stars scales rating for
heating and cooling
• Indicative percentage of improvements
compared to reference ‘model’ house
• WERS ratings are designed to 'plug in' to
NatHERS, Australia's Nationwide House
Energy Rating Software. 18
19. France’s labeling under preparation
• Energy consumption is calculated with
TRNSYS software using 96 different
types of windows
• Multi-linear regression are used to 12 m
evaluate energy consumption of building
only using window parameters: Uw and ETIQUETTE D’EFFICACITE
gw H2a
ENERGETIQUE FENETRE
Zones Climatiques France
• Energy ranking is based on H2b,c,d H1 – H2a H2 b,c,d H3
improvement compared to a single A
B B
glazed window C C
D
• Summer comfort is related to potential
air-conditioning consumption Isolation Thermique Uw: 1.4 W/m²K
Economies d’énergie*
Facteur solaire Sw: 0.42
Transmission Lumineuse 56% Confort d’été
MENUISERIE XXX
MODELE AAA FR
* Les économies d’énergie correspondent à l’amélioration moyenne calculée par rapport à une fenêtre
classique en simple vitrage et ne tiennent pas compte ni de la taille ni des orientations 19
20. Scale of the challenge in EU
• Over 85% of
inefficient glazing
surfaces in Europe’s
buildings
• Over 100 million
tonnes of CO2 to be
saved annually.
* According to three different scientific studies
carried by the Dutch independant research
institute TNO.
20
21. Legislations can help!
Importance of proper minimum energy performance
requirements for components being replaced (i.e. Cost-optimality in EU
recast EPBD)
21
22. Labeling and more…
Information to consumer
+
Basis for minimum performance
requirements in building regulations
+
Basis to grant financial incentives / tax
returns
22