Contract: EIE/07/069/SI Duration: October 2007 – March 2010 Calculation of the integrated energy performance of buildings EN 15316: Heating systems in buildings Method for calculation of system energy requirements and system efficiencies EN : Energy requirements and efficiencies of thermal solar systems Claude FRANÇOIS CSTB / France

slide 2 Scope of the Standard Principle of the method Description of the methods (A & B) Links with EN Standards Outline

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 COOLING VENTILATION EN EN EN15243 EN EN15243 LIGHTING EN EN15193 EN SERVICES BUILDING NEEDS EMISSION DISTRIBUTION GENERATION OVERALL PERFORMANCE DHW EN EN EN EN EN HEATING EN EN x EN Fitting into the Puzzle

slide 6 Asses the energy performance of thermal solar systems for domestic hot water and/or space heating (combisystems: for DHW and space heating). Method may be applied to: judge compliance with regulations expressed in terms of energy targets, optimise energy performance of a planned system, asses the effect of energy conservation measures on an existing system. Scope of the standard

slide 7 Building needs Technical system losses Delivered / exported energy Energy rating (prim. energy, CO 2, etc) Inside the buildingOutside the building Calculation direction 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). Principle of the method - General

slide 8 The performance of the thermal solar system is determined by: product characteristics according to products standards, storage tank parameters, collector loop and distribution thermal losses, control of the system, climate conditions, auxiliary energy of the solar collector pump and control units, heat use of the space heating distribution system, heat use of the domestic hot water distribution system. Principle of the method - parameters

slide 9 Heat use of the space heating distribution system: required space heating needs (EN ISO 13790) thermal losses from space heating emission (EN ) thermal losses from space heating distribution (EN ) Heat use of the domestic hot water distribution system: required energy for domestic hot water needs (EN ) thermal losses from domestic hot water distribution (EN ) Principle of the method –system specifications

slide 10 Input data: type and characteristics of the thermal solar system, location of the thermal solar system, type of control system, heat use. Output data: heat delivered by the thermal solar system, thermal losses of the solar storage tank, auxiliary energy consumption of pump and control equipment of the collector loop, recoverable and recovered auxiliary energy, recoverable and recovered thermal losses of the storage tank. Principle of the method – inputs/outputs

slide 11 Two methods enable the use of different type of input data: method A: uses system data from system tests or default values given in the format of EN performances indicators; system simulations can also be used; method B: uses component data from component tests or default input values. Using method A, specific system parameters/characteristics (control strategies) can be better taken into account. Method A can also be used for solar combi-systems with collector smaller than 6 m 2. Method B is based on the f-chart method. Description of the method (1/2)

slide 12 The heat use applied to the thermal solar system depends on: the needs to satisfy (DHW, space heating), the system configuration (preheat system, solar-plus-supplementary system, solar-only system). To avoid iterative calculation procedures, the following assumptions are made: the heat use to be applied shall take into account needs (DHW) and thermal losses of the distribution system, for a preheat system, thermal losses between the system and the back-up heater shall not be added to the heat use applied, thermal losses (storage tank and collector loop) shall not be added to the heat use applied. Description of the method (2/2)

slide 13 Heat Balance for a solar preheat system solar-only system

slide 14 Heat Balance for a solar-plus-supplementary system

slide 15 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.