NF EN ISO 13791

ISO 13791:2004 specifies the assumptions, boundary conditions, equations and validation tests for a calculation procedure, under transient hourly conditions, of the internal temperatures (air and operative) during the warm period, of a single room without any cooling/heating equipment in operation. No specific numerical techniques are imposed by this standard. Validation tests are included. An example of a solution technique is given in Annex A. ISO 13791:2004 does not contain sufficient information for defining a procedure able to determine the internal conditions of special zones such as attached sun spaces, atria, indirect passive solar components (Trombe walls, solar panels) and zones in which the solar radiation may pass through the room. For such situations different assumptions and more detailed solution models are needed.

ISO 52016-1:2017 specifies calculation methods for the assessment of: a) the (sensible) energy need for heating and cooling, based on hourly or monthly calculations; b) the latent energy need for (de-)humidification, based on hourly or monthly calculations; c) the internal temperature, based on hourly calculations; d) the sensible heating and cooling load, based on hourly calculations; e) the moisture and latent heat load for (de-)humidification, based on hourly calculations; f) the design sensible heating or cooling load and design latent heat load using an hourly calculation interval; g) the conditions of the supply air to provide the necessary humidification and dehumidification. The calculation methods can be used for residential or non-residential buildings, or a part of it, referred to as "the building" or the "assessed object". ISO 52016-1:2017 also contains specifications for the assessment of thermal zones in the building or in the part of a building. The calculations are performed per thermal zone. In the calculations, the thermal zones can be assumed to be thermally coupled or not. The calculation methods have been developed for the calculation of the basic energy loads and needs, without interaction with specific technical building systems, and for the calculation of the system specific energy loads and needs, including the interaction with specific systems. The hourly calculation procedures can also be used as basis for calculations with more extensive system control options. ISO 52016-1:2017 is applicable to buildings at the design stage, to new buildings after construction and to existing buildings in the use phase. NOTE Table 1 in the Introduction shows the relative position of ISO 52016-1:2017 within the set of EPB standards in the context of the modular structure as set out in ISO 52000-1.

ISO 52017-1:2017 specifies the general assumptions, boundary conditions and equations for the calculation, under transient hourly or subhourly conditions, of the internal temperatures (air and operative) and/or the heating, cooling and humidification and dehumidification loads to hold a specific (temperature, moisture) set point, in a single building zone. No specific numerical techniques are imposed by ISO 52017-1:2017. Specific calculation procedures based on the generic calculation procedures of ISO 52017-1:2017 are given in ISO 52016-1. The specific simplifications, assumptions and boundary conditions in ISO 52016-1 are tailored to the respective application areas, such as the energy need for heating and cooling and for humidification and dehumidification, hourly internal temperature, design heating and cooling and humidification and dehumidification load. NOTE Table 1 in the Introduction shows the relative position of ISO 52017-1:2017 within the set of EPB standards in the context of the modular structure as set out in ISO 52000-1.