BS EN ISO 11855-2:2015
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Building environment design. Design, dimensioning, installation and control of embedded radiant heating and cooling systems Determination of the design heating and cooling capacity
Hardcopy , PDF
01-11-2021
English
31-08-2015
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Foreword
Introduction
1Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Concept of the method to determine the
heating and cooling capacity
6 Heat exchange coefficient between surface
and space
7 Simplified calculation methods for determining
heating and cooling capacity or surface temperature
8 Use of basic calculation programs
9 Calculation of the heating and cooling capacity
Annex A (normative) - Calculation of the heat flux
Annex B (normative) - General resistance method
Annex C (normative) - Pipes embedded in wooden
construction
Annex D (normative) - Method for verification of FEM
and FDM calculation programs
Annex E (normative) - Values for heat conductivity of
materials and air layers
Bibliography
Defines 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.
| Committee |
RHE/24
|
| DocumentType |
Standard
|
| Pages |
66
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
This part of ISO11855 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 ISO11855 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 flow density between water and space, the associated nominal medium differential temperature, and the field of characteristic curves for the relationship between heat flow density and the determining variables are given as the result. This part of ISO11855 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 ISO11855 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 ISO11855 series also applies, as appropriate, to the use of fluids other than water as a heating or cooling medium. The ISO11855 series is not applicable for testing of systems. The methods do not apply to heated or chilled ceiling panels or beams.
| Standards | Relationship |
| EN ISO 11855-2:2015 | Identical |
| ISO 11855-2:2012 | Identical |
| EN 13202 : 2000 | ERGONOMICS OF THE THERMAL ENVIRONMENT - TEMPERATURES OF TOUCHABLE HOT SURFACES - GUIDANCE FOR ESTABLISHING SURFACE TEMPERATURE LIMIT VALUES IN PRODUCT STANDARDS WITH THE AID OF EN 563 |
| EN 1264-5:2008 | Water based surface embedded heating and cooling systems - Part 5: Heating and cooling surfaces embedded in floors, ceilings and walls - Determination of the thermal output |
| ISO 7726:1998 | Ergonomics of the thermal environment Instruments for measuring physical quantities |
| ISO/TS 13732-2:2001 | Ergonomics of the thermal environment — Methods for the assessment of human responses to contact with surfaces — Part 2: Human contact with surfaces at moderate temperature |
| EN 15377-1:2008 | Heating systems in buildings - Design of embedded water based surface heating and cooling systems - Part 1: Determination of the design heating and cooling capacity |
| EN 563:1994/A1:1999/AC:2000 | SAFETY OF MACHINERY - TEMPERATURES OF TOUCHABLE SURFACES - ERGONOMICS DATA TO ESTABLISH TEMPERATURE LIMIT VALUES FOR HOT SURFACES |
| ISO 11855-1:2012 | Building environment design Design, dimensioning, installation and control of embedded radiant heating and cooling systems Part 1: Definition, symbols, and comfort criteria |
| EN 12828:2012+A1:2014 | Heating systems in buildings - Design for water-based heating systems |
| ISO 13370:2017 | Thermal performance of buildings — Heat transfer via the ground — Calculation methods |
| ISO 7730:2005 | Ergonomics of the thermal environment — Analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria |
| EN 1264-2:2008+A1:2012 | Water based surface embedded heating and cooling systems - Part 2: Floor heating: Prove methods for the determination of the thermal output using calculation and test methods |
| EN 12831:2003 | Heating systems in buildings - Method for calculation of the design heat load |
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