Contract: EIE/07/069/SI Duration: October 2007 – March 2010Version: March 2010 The common definitions and common symbols for EPBD related CEN standards Given in CEN Technical report CEN/TR ("Umbrella Document') Dick van Dijk 1), Johann Zirngibl 2) 1): TNO Built Environment and Geosciences, The Netherlands 2): CSTB, CENSE

slide 2 Outline The EU CENSE project Introduction of the CEN Technical Report CEN TR in which the common definitions and symbols are presented Background Common definitions –including examples Common symbols and subscripts –including examples Frequently asked questions

slide 3 The EU CENSE project (Oct March 2010) Aim of the project: To accelerate adoption and improved effectiveness of the EPBD related CEN- standards in the EU Member States These standards were successively published in the years and are being implemented or planned to be implemented in many EU Member States. However, the full implementation is not a trivial task Main project activities: A.To widely communicate role, status and content of these standards; to provide guidance on the implementation B.To collect comments and good practice examples from Member States aiming to remove obstacles C.To prepare recommendations to CEN for a “second generation” of standards on the integrated energy performance of buildings

slide 4 Brief introduction A brief introduction to the CENSE project and the CEN-EPBD standards is provided in a separate presentation:

slide 5 More information More information and downloads: Disclaimer: CENSE has received funding from the Community’s Intelligent Energy Europe programme under the contract EIE/07/069/SI The content of this presentation reflects the authors view. The author(s) and the European Commission are not liable for any use that may be made of the information contained therein. Moreover, because this is an interim result of the project: any conclusions are only preliminary and may change in the course of the project based on further feedback from the contributors, additional collected information and/or increased insight.

slide 6 Introduction of CEN Technical Report TR CEN Technical Report, CEN/TR 15615, Explanation of the general relationship between various European standards and the Energy Performance of Buildings Directive (EPBD) - Umbrella Document, April 2008 Relevant for this presentation: –Annex C provides an extensive list of common definitions –Annex D provides an extensive list of common symbols Under responsibility of CEN/BT TF 173, Energy performance of buildings project group (currently called CEN/BT TC 371)

slide 7 Background

slide 8 Common definitions and symbols Consequently: work started to prepare sets of common definitions and symbols on the main concepts and physical quantities Due to timing constraints: in parallel with the development of the standards Cover terms and data passing from one standard to another Already applied in several key standards, such as: –EN (on energy performance rating) –EN (on overall assessment of energy performance) –EN ISO (on energy use for heating and cooling)

slide 9 Common definitions: a few examples C.5.1, energy performance of a building calculated or measured amount of weighted net delivered energy actually used or estimated to meet different needs associated with a standardised use of a building, which may include, inter alia, energy used for heating, cooling, ventilation, domestic hot water and lighting C.5.2, energy performance requirement minimum level of energy performance that is to be achieved to obtain a right or an advantage: e.g. right to build, lower interest rate, quality label C.5.3, energy rating evaluation of the energy performance of a building based on the weighted sum of the calculated or measured use of energy carriers

Common definitions Buildings: –building –new building –existing building –technical building system –technical building sub-system –internal dimension –overall internal dimension –external dimension –thermal envelope area –heated space –cooled space –conditioned space –unconditioned space –conditioned area –conditioned zone –occupied zone Technical building systems –auxiliary energy –cogeneration –air conditioning system room conditioning system –demand controlled ventilation –dehumidification –humidification –ventilation –ventilation heat recovery –part load operation –system thermal loss –recoverable system thermal loss –recovered system thermal loss –CO2 emission coefficient –energy need for heating or cooling –energy need for humidification or dehumidification –energy need for domestic hot water –energy use for space heating or cooling or domestic hot water –energy use for ventilation –energy use for lighting –grid electricity –gross calorific value Inspection of heating and air- conditioning systems –energy inspection –inspector –air conditioning system control –commissioning –design criteria –design documentation Energy –energy source –energy carrier –energyware –system boundary –delivered energy –exported energy –net delivered energy –non-renewable energy –renewable energy –renewable energy produced on the building site –primary energy –total primary energy factor –non-renewable primary energy factor –measured energy indicator –energy certificate –energy class –reference value Costs –reasonably possible –reasonable cost Energy ratings and certification –energy performance of a building –energy rating –calculated energy rating –standard energy rating –design energy rating –tailored energy rating –standard use data set –measured energy rating –confidence interval –statistical tolerance interval –energy certification –energy indicator –standard calculated energy indicator –transmission heat transfer coefficient –ventilation heat transfer coefficient –building heat transfer coefficient –intermittent heating or cooling –heat gains –internal heat gains –solar irradiation –solar heat gain –useful heat gains –gain utilisation factor –loss utilisation factor –heat balance ratio Energy calculation –space heating –space cooling –building calculation model –validated building data set –calculation step –calculation period –heating or cooling season –external temperature –internal temperature –set-point temperature of a conditioned zone –equivalent internal temperature: –set-back temperature –heat transfer coefficient

More on the common symbols and subscripts Most symbols are no surprise: ISO rules –Q: heat –E: energy –T: temperature –….. Subscripts: almost from scratch –Including rules how and when to use them

Common subscripts Main table, part 1:

Common subscripts Main table, part 2:

Examples: common symbols combined with subscripts Q H,nd –Energy need for heating E HW,gen,in –Energy input to the common generator for heating and domestic hot water (= energy use for heating and DHW) E T,exp,ren –Renewable part of the exported thermal energy

More detailed examples: Outputs of heat generation standards Type of generator DHWBoiler Heat pump Thermal solar Cogene- ration District heating Photo- voltaic Biomass Auxiliary energy W gen W W,gen,aux W H,gen,aux W HW,gen,aux W sol,aux (whole systems) W gen,aux,chp W gen,aux,dh W gen,aux,pv W H,gen,aux System (ge- nerator) ther- mal losses Q gen,ls Q W,gen,ls Q H,gen,ls Q HW,gen,ls Q sol,ls (whole systems) Q gen,ls,chp Q gen,ls,dh Q gen,ls,pv Q H,gen,ls Recoverable system ther- mal losses Q gen,ls,rbl Q W,gen,ls,rbl Q H,gen,ls,rbl Q sol,ls,rbl (whole systems) Q gen,ls,rbl,chp Q gen,ls,rbl,dh Q gen,ls,rbl,pv Q H,gen,ls,rbl Electricity production E el,gen,out Not relevant E el,chp,out Not relevant E el,pv,out Not relevant Energy carrier f p,dh

More detailed examples: Energy balance Input and output data for technical building system i, sub- system j SUBsubsystem j balance boundary SUB HRecsubsystem j heat recovery boundary Qi,j,outsubsystem j heat output Ej,j,insubsystem j input Wi,j,auxsubsystem j auxiliary energy Qi,j,aux,rvdsubsystem j auxiliary energy heat recovery in the subsystem Qi,j,lssubsystem j thermal loss Qi,j,ls,rblsubsystem j loss recoverable for space heating Qi,j,ls,th,rblsubsystem j thermal loss recoverable Qi,j, aux,rblsubsystem j auxiliary energy recoverable Qi,j,ls, th,nrblsubsystem j thermal loss (thermal part) non recoverable Qi,j, aux, nrblsubsystem j auxiliary energy non recoverable

Translations Suggestion: to adopt the same set also in translated national standards –with English expression given as additional information, to explain the origin of the abbreviation Example at next page

Example: Symbo ol GrootheidEenheidEngelse oorsprong AOppervlaktem2m2 Area Hwarmteoverdrachtsco ë ffici ë nt W/KHeat transfer coefficient RwarmteweerstandM 2 K/WThermal resistance Symbols: –From draft NEN 7120 Dutch  English origin Subscripts: –From draft NEN 7120 Dutch  English origin –From UNI/TS Italian IndexBetekenisEngelse oorsprong Delaangeleverddelivered CKoeling (energiegebruik voor ~) Cooling (energy use for ~) GenOpwekkingGeneration Pedici Gterrenosetregolazione Glvetroshombreggiatura, schermatura Gnaporti termicishutChiusura oscurante

slide 19 Frequently Asked Questions Are the common definitions given in CEN/TR mandatory? Are the common symbols given in CEN/TR mandatory? Why are the symbols in some of the EN ISO standards related to the EPBD not always the same as in the CEN standards to support the EPBD? See the answers in Information Paper P154…

slide 20 More information on this topic P154, Information paper on the common definitions and common symbols for EPBD related CEN standards, given in CEN Technical report CEN/TR ("Umbrella Document') CEN Technical Report, CEN/TR 15615, Explanation of the general relationship between various European standards and the Energy Performance of Buildings Directive (EPBD) - Umbrella Document, April 2008 Strongly related: Information Papers on the top level CEN standard EN (On assessment of overall energy performance): P087, P088

slide 21 More information More information and downloads: Disclaimer: CENSE has received funding from the Community’s Intelligent Energy Europe programme under the contract EIE/07/069/SI The content of this presentation reflects the authors view. The author(s) and the European Commission are not liable for any use that may be made of the information contained therein. Moreover, because this is an interim result of the project: any conclusions are only preliminary and may change in the course of the project based on further feedback from the contributors, additional collected information and/or increased insight.