DIN Standards Committee Building and Civil Engineering
Energy performance of buildings - Energy needs for heating and cooling, internal temperatures and sensible and latent heat loads - Part 3: Calculation procedures regarding adaptive building envelope elements (ISO 52016-3:2023); German version EN ISO 52016-3:2023
Abstract
This document provides procedures enabling to take into account the effect of adaptive building envelope elements in the calculation of the energy needs for heating, cooling, internal temperatures and sensible and latent heatloads for buildings. ISO 52016-1:2017 contains a normative Annex G that provides already a framework for such calculation procedures. The aim of this document is to work out calculation procedures instead of only a framework for the calculation. Adaptive building envelope elements are (usually: transparent) elements in the building envelope withthermal and/or solar and/or visual properties that vary in time, either passively or due to an active control. The aim of adaptive building envelope elements is to improve the energy performance and/or comfort in the building under varying outdoor conditions (weather, season), indoor conditions (e.g. internal heatgains) and user needs. Examples of adaptive building envelopes are products or assemblies with one or more of the following features: - movable blinds; - controllable vents; - switchable glazing; - movable thermally insulating shutters; - PV integrated glazing (leading to variable total (thermal) solar energy transmittance); - double skin facades. The input data for the calculation are the thermal, solar and visual properties of the building element forthe different states (e.g. from open to closed, from dark to light and combinations of these); and in caseof gradually varying properties: for a number of representative discrete states. In order to be able to use these properties for energy and internal temperature calculations, the detailsof the (passive or active) control protocol are needed as input as well. The thermal, solar and visual properties of the building element are the thermal transmittance (U-value), air permeability (L-value) and solar transmittance (g-value). Or, where needed, the propertiesper component: e.g. thermal resistances and air permeability per component, solar absorptance andsolar and visual transmittance per component. It is assumed that the existing standards on glazing (ISO/TC 160/SC 2, CEN/TC 129) and on building elements (especially the EPB standards recentlyrevised under ISO/TC 163/SC 2 and CEN/TC 89) enable to obtain these input data in most cases. No ready-to-use international standards exist for the assumptions on the control protocol. EN 15232-1 (and ISO 52120-1 in preparation) provides some guidance.The output of this document should also be usable to compare products and assemblies. Due to the interactive nature of adaptive building envelope elements, this may require the use of specific referencebuildings and occupant patterns (similar as for current international standards on energy performancerating of glazings and windows).
Begin
2018-09-18
WI
00089189
Planned document number
DIN EN ISO 52016-3
Project number
00518451
Responsible national committee
Responsible european committee
CEN/TC 89 - Thermal performance of buildings and building components
Responsible international committee
ISO/TC 163/SC 2/WG 15 - Energy Performance calculation methods
draft standard
Energy performance of buildings - Energy needs for heating and cooling, internal temperatures and sensible and latent heat loads - Part 3: Calculation procedures regarding adaptive building envelope elements (ISO/DIS 52016-3:2022); German and English version prEN ISO 52016-3:2022
2022-06
Order from DIN Media
