Calculation methods and codes
The program incorporates the following analysis methodology and codes:
- 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 establishes the minimum requirements for any method or procedure used to calculate peak cooling and heating loads.
- Calculation of cooling heat loads according to the ASHRAE radiant time series method.
- Heating loads according to 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 shadow detection in the calculation model (from the 3D model or BIM models).
- Automatic edge detection (from 3D model or BIM models).
- Management of edges for buildings from BIM models, allowing the generation of thermal bridges with their corresponding transmittances (according to ISO 14683) based on the edges detected, depending on the construction solutions adopted and the description of the building from the point of view of thermal analysis (zoning, description of spaces, etc.) with the possibility of calculation by numerical analysis according to ISO 10211.
Note:
The following link can be consulted to find out about the codes implemented in CYPE's programs.
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 the calculation of cooling heat loads and detailed in its "Load Calculation Applications Manual" of 2010, is the most widely used method for the estimation of heat loads.
As a calculation method that separates the contributions of each input, it facilitates the analysis and understanding of the results by the project designer, which together with its accuracy, speed and low computational requirements, makes it a perfect method to improve the design of the building quickly and intuitively.
