Analysis methodology and standards
The program incorporates the following analysis methodology and regulations:
- Calculation in accordance with ANSI/ASHRAE/ACCA Standard 183-2007 (RA 2011), "Peak Cooling and Heating Load Calculations in Buildings Except Low-Rise Residential Buildings", which sets out the minimum requirements that any method or procedure used to calculate peak cooling and heating loads must meet.
- Calculation of cooling loads using the ASHRAE radiant time-series method.
- Heating loads in accordance with ASHRAE or EN 12831.
- ISO 6946. Building components and building elements — Thermal resistance and thermal transmittance — Calculation methods
- ISO 13370. Thermal performance of buildings — Heat transfer via the ground — Calculation methods
- ISO 14683. Thermal bridges in building construction — Linear thermal transmittance — Simplified methods and default values.
- ISO 10456. Building materials and products — Hygrothermal properties
- Automatic detection of shadows in the analysis model (based on the 3D model or BIM models).
- Automatic edge detection (from a 3D model or BIM models).
- Edge management for buildings derived from BIM models, enabling the generation of thermal bridges with their corresponding transmittances (in accordance with ISO 14683) based on the detected edges, depending on the construction solutions adopted and the description of the building from a thermal analysis perspective (zoning, description of spaces, etc.), with the option of calculation by numerical analysis in accordance with ISO 10211.
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| Please follow the link below to find out about the standards implemented in CYPE software. |
Radiant time series method
The Radiant Time Series Method (RTSM), proposed and recommended by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) for analysing cooling loads and detailed in its 2010 "Load Calculation Applications Manual", is the most widely used method for estimating thermal loads.
As this is an analysis method that breaks down the contributions of each factor, it makes it easier for the project designer to analyse and understand the results; this, combined with its accuracy, speed and low computational demands, makes it the ideal method for improving the building’s design quickly and intuitively.
