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BS EN ISO 11855-2:2021

BS EN ISO 11855-2:2021

$198.66

Building environment design. Embedded radiant heating and cooling systems – Determination of the design heating and cooling capacity

Published By Publication Date Number of Pages
BSI 2021 68
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This document specifies procedures and conditions to enable the heat flux 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 document is carried out by calculation in accordance with design documents and a model. This enables 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 document 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.

PDF Catalog

PDF Pages PDF Title
2 undefined
3 64_e_stf.pdf
5 European foreword
Endorsement notice
7 Foreword
8 Introduction
10 1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
12 5 Concept of the method to determine the heating and cooling capacity
13 6 Heat exchange coefficient between surface and space
15 7 Simplified calculation methods for determining heating and cooling capacity or surface temperature
16 7.1 Universal single power function
18 7.2 Thermal resistance methods
21 8 Use of basic calculation programmes
8.1 Basic calculation programmes
22 8.2 Items to be included in a complete computation documentation
9 Calculation of the heating and cooling capacity
23 Annex A (normative) Calculation of the heat flux
45 Annex B (informative) General resistance method
51 Annex C (informative) Pipes embedded in wooden construction
59 Annex D (normative) Method for verification of FEM and FDM calculation programmes
62 Annex E (normative) Values for heat conductivity of materials and air layers
64 Annex F (informative) Maximal surface temperatures for floor heating systems
65 Bibliography

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BS EN ISO 11855-2:2021
$198.66