Contract: EIE/07/069/SI Duration: October 2007 – March 2010Version: Nov. 30, 2009 Calculation of the integrated energy performance of buildings Method for calculation of system energy requirements and system efficiencies EN : Photovoltaic systems Johann ZIRNGIBL - Claude FRANÇOIS CSTB / France -

slide 2 Outline The EU CENSE project Scope of the Standard Principle of the method Description of the method

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 Basic steps Calculation direction is from needs to source (from the energy needs to the primary energy). Energy can be imported or exported (different weightings) Electrical uses and thermal uses are considered separately inside the building boundary. Inside the system boundary the system losses are taken into account explicitly, Outside the system boundary they are taken into account in the conversion factor (e.g. district heating).

slide 7  Method for the calculation of the electricity production of building integrated photovoltaic systems.  Method does not take into account: o electrical storage; o PV/thermal photovoltaic systems.  Only the calculation method and the accompanying input parameters are normative.  All values required to parameter the calculation method should be given in a national annex. Scope of the standard

slide 8 Based on the performance characteristics of the products (given in product standards) Electricity produced is calculated considering: o annual solar irradiation on the photovoltaic system; o peak power; o system performance factor; o reference solar irradiance. The result of the calculation is the electrical output of the photovoltaic panel. Principle of the method

slide 9 Solar irradiation on the photovoltaic modules annual solar irradiation on a horizontal surface is corrected by a tilt and orientation conversion factor Peak Power peak power is obtained under standard test conditions. Note: If not available, it can be calculated by the total surface of all photovoltaic modules (without frame) multiplied by a peak power coefficient Description of the method (1/3) The electricity produced by the photovoltaic system is calculated in kWh/year Parameters taken into account:

slide 10 System performance factor takes into account the system performance of the photovoltaic installation depending on:  conversion system from direct current to alternating current;  actual operation temperature of the photovoltaic modules;  building integration of the photovoltaic modules (e.g. ventilation) Thermal output of the photovoltaic panel No thermal output is taken into account Description of the method (2/3)

slide 11 Auxiliary energy consumption Accounted for by applying the net power production (total power production minus all auxiliary energy consumption inside the sub-system boundaries). System thermal losses No system thermal losses are taken into account. Recoverable system thermal losses No losses are recoverable for the diminution of the space heating needs Description of the method (3/3)

slide 12 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.