20/30391108 DC - BS EN ISO 11855-2. Building environment design. Embedded radiant heating and cooling systems. Part 2. Determination of the design heating and cooling capacity

20/30391108 DC

BS EN ISO 11855-2. Building environment design. Embedded radiant heating and cooling systems. Part 2. Determination of the design heating and cooling capacity

Status : Current, Draft for public comment   Published : March 2020

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This part of ISO 11855 specifies procedures and conditions to enable the heat flow in water based surface heating and cooling systems to be determined relative to the medium differential temperature for systems. The determination of thermal performance of water based surface heating and cooling systems and their conformity to this part of ISO 11855 is carried out by calculation in accordance with design documents and a model. This should enable a uniform assessment and calculation of water based surface heating and cooling systems.

The surface temperature and the temperature uniformity of the heated/cooled surface, nominal heat flux between water and space, the associated nominal medium differential temperature, and the field of characteristic curves for the relationship between heat flux and the determining variables are given as the result.

This part of ISO 11855 includes a general method based on Finite Difference or Finite Element Methods and simplified calculation methods depending on position of pipes and type of building structure.

The ISO 11855 series is applicable to water based embedded surface heating and cooling systems in residential, commercial and industrial buildings. The methods apply to systems integrated into the wall, floor or ceiling construction without any open air gaps. It does not apply to panel systems with open air gaps which are not integrated into the building structure.

The ISO 11855 series also applies, as appropriate, to the use of fluids other than water as a heating or cooling medium. The ISO 11855 series is not applicable for testing of systems. The methods do not apply to heated or chilled ceiling panels or beams.




Standard Number20/30391108 DC
TitleBS EN ISO 11855-2. Building environment design. Embedded radiant heating and cooling systems. Part 2. Determination of the design heating and cooling capacity
StatusCurrent, Draft for public comment
Publication Date26 March 2020
Normative References(Required to achieve compliance to this standard)ISO 11855-1, EN 1264
Informative References(Provided for Information)ISO 7730, EN 13202, EN 1264, ISO 7726, ISO/TS 13732-2, ISO 13370, EN 12831:2017
International RelationshipsISO/DIS 11855-2
Draft Expiry Date09 May 2020
DescriptorsHeat transfer, Heating equipment, Hot-water central heating, Cooling, Heat pipes, Mathematical calculations, Heating, Design, Buildings, Central heating, Surfaces, Space-heating systems, Heat capacity, Water
ICS91.040.01
91.140.10
91.140.30
Title in FrenchConception de l'environnement des bâtiments — Systèmes intégrés de chauffage et de refroidissement par rayonnement — Partie 2: Détermination de la puissance calorifique et frigorifique à la conception Partie 2: Détermination de la puissance calorifique et frigorifique à la conception
CommitteeRHE/2
PublisherBSI
FormatA4
DeliveryYes
Pages63
File Size7.316 MB
NotesWarning: this draft is not current beyond its expiry date for comments.
Price£20.00


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