1 / 18

Support for the integration of modelling in the Energy Performance of Buildings Directive

Support for the integration of modelling in the Energy Performance of Buildings Directive. Georgios Kokogiannakis. Energy Performance of Buildings Directive (EPBD). EPB Directive 2002/91/EC: Proposal published on 11 May 2001 Came into force on 4 January 2003

aerona
Download Presentation

Support for the integration of modelling in the Energy Performance of Buildings Directive

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Support for the integration of modelling in the Energy Performance of Buildings Directive Georgios Kokogiannakis

  2. Energy Performance of Buildings Directive (EPBD) • EPB Directive 2002/91/EC: • Proposal published on 11 May 2001 • Came into force on 4 January 2003 • On January 2006, Member States have to put the Directive into practice through their own legislation • Objective: promote the cost-effective improvement of energy performance of buildings

  3. Energy Performance of Buildings Directive – why? • Europe is worried about the security of Energy Supply • Kyoto protocol obligation to reduce greenhouse gas emissions • Limited impact on supply but potential savings on demand and mainly at buildings

  4. Energy Performance of Buildings Directive – what? • Calls for a common methodology for an integrated energy performance of buildings based on technical annex …integrated… …integrated…

  5. Energy Performance of Buildings Directive – what? • Calls for a common methodology for an integrated energy performance of buildings based on technical annex …integrated… …integrated…

  6. Sustainability & Directive • Does the Directive cover the set of aspects that society is interested in during the sustainable design of buildings? • How is it going to evolve?

  7. Sustainability & Directive Acoustics, Local thermal & visual comfort, contaminants concentration, surface condensation, e.t.c….

  8. Integrative modelling • Buildings: • Systematic (many parts make the whole) • Dynamic (the parts evolve at different rates) • Non-linear (the parameters depend on the thermodynamic state) • Complex (myriad interactions)

  9. Integrative modelling • Preserves the integrity of building/plant system • Cheaper & quicker feedback on alternative design approaches • Large number of assessment under realistic conditions

  10. Methodology in UK • Domestic buildings: • Simplified methods (SAP2005 in England and Wales, SERT in Scotland) • Non-domestic buildings: • Detailed thermal modelling software • New simplified tool (NCT) based on the Dutch Standard NEN 2916:1998

  11. Which method? • Is a simplified method enough to cover appropriate the building sustainability issues? • What are the dangers of using such a method? • If modelling: • How should users select modelling tools?

  12. Case studies • Two modelling tools (ESP-r & EnergyPlus) • Simplified method Dutch Standard NEN 2916:1998 Base Case • Heating and cooling loads • Daylight & glare • Peak & Mean Air Temperatures • Overheating risk • Thermal comfort • …… • Change orientation • Change constructions • Change occupancy patterns • Change climate • Change ventilation strategies • Change shading strategies

  13. Case studies • Inability of the simplified method to deal with some of the assessments • Simplified method – not “simplified” for use • Simplified method produces different results than the two modelling tools • Differences in some cases between the results of the two modelling tools

  14. Software accreditation • “Online” validation: Embedded validation tests in the modelling tool (ESP-r) • Users can access & choose tests • Run them automatically with pre-defined parameters • Results analysis is automatically invoked • Specific results for every test are recovered and saved in a file …

  15. Software accreditation • “Online” validation:Embedded validation tests in the modelling tool (ESP-r) • ESP-r reads a recovery data file • A check is made whether or not the recovered results are within the specified range • Results from the previous released version or another version of the past are also displayed

  16. “Online validation” - Benefits • Developers can check the impact of code modifications • Developers can check compliance with regulations • Frequent checking will confirm the fact that a program continues to be within the specified tolerance bands

  17. “Online validation” - Benefits • User confidence is improved • Users can confirm their installation is correct and check Standards compliance themselves • No need for repeating the construction of the models set out in the validation tests

  18. Summary • EPB Directive is a good first step • Expected to evolve to cover more sustainability issues • Need for a methodology that integrates these issues • Modelling exists and has the capability to deal with these issues • Accreditation process needed • “Online validation” can offer useful benefits

More Related