Overview
ISO/TR 52010-2:2017 is an informative technical report that explains and justifies the contents of ISO 52010‑1 (the EPB - Energy Performance of Buildings - climatic data standard). It does not introduce normative requirements; instead it provides background, worked examples, validation notes and an accompanying calculation spreadsheet to support correct interpretation and consistent application of ISO 52010‑1.
Key topics covered
- Purpose and scope of the explanatory report and its relationship to the ISO 52010 series and wider EPB (Energy Performance of Buildings) standards.
- Detailed description of the calculation methods used to convert horizontal measured solar data to irradiance and illuminance on planes with any tilt and azimuth, including:
- sun‑path calculation and time‑step handling
- splitting global horizontal radiation into direct and diffuse components
- calculation of solar irradiance on non‑horizontal planes
- solar shading by distant objects and sector‑based skyline input
- ground reflectivity (albedo) treatment
- calculation of illuminance
- Quality control, compliance checks and validation procedures (including comparison to BESTEST cases).
- Directional (spatial) distribution topics (e.g., Tregenza sky subdivision) and allocation of diffuse radiation into sky elements.
- Annexes and worked examples, plus an accompanying spreadsheet demonstrating hourly calculation steps and outputs.
Practical applications and users
ISO/TR 52010-2:2017 is intended for practitioners who need to apply or interpret the climatic conversion rules in ISO 52010‑1, including:
- Building energy modellers and simulation software developers implementing solar irradiation and shading routines.
- Energy assessors, consultants and designers performing compliance checks, energy performance calculations and daylighting studies.
- Standards bodies and regulators adopting EPB standards into national building codes.
- Researchers and educators seeking validated worked examples and a reference spreadsheet to benchmark methods.
The report helps ensure consistent input data and reproducible procedures for simulations of heating/cooling loads, solar gain estimates, daylight assessments and code compliance.
Related standards (context)
- ISO 52010‑1 - Conversion of climatic data for energy calculations (normative companion)
- ISO 52000‑1 and other EPB standards - overarching energy performance framework
- ISO 15927 series - source standards for hygrothermal and meteorological data
Keywords: ISO/TR 52010-2:2017, ISO 52010-1, energy performance of buildings, external climatic conditions, solar irradiance, solar shading, climatic data conversion, EPB standards, building energy simulation.