EN 15377-3:2007

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
  3.1 Data referred to the circuit
  3.2 Data referred to the room geometry and the boundary
      conditions
  3.3 Data referred to the slab and its partitions
  3.4 Data referred to the initial temperature profile
  3.5 Calculation of the temperature profile and the heat fluxes
      in the generic time-step n
4 Relation to other EPBD standards
5 Optimisation of systems for facilitating the use of renewable
  energy sources
6 The concept of Thermo-Active-Building-Systems (TABS)
7 Calculation methods
  7.1 General
  7.2 Rough sizing method
  7.3 Simplified sizing method using diagrams
  7.4 Simplified model based on finite difference method (FDM)
      7.4.1 Cooling system
      7.4.2 Hydraulic circuit
      7.4.3 Slab
      7.4.4 Room
      7.4.5 Limits of the method
  7.5 Dynamic building simulations program
8 Input for computer simulations of energy performance
Annex A (informative) Simplified diagrams
Annex B (normative) Calculation method
  B.1 Pipes level
  B.2 Subdivision of the slab
  B.3 Choice of the calculation time step
  B.4 Calculations for the generic n-th time step
  B.5 Sizing of the system
Annex C (informative) Tutorial guide for assessing the model
Annex D (informative) Computer program
Bibliography

This document is applicable to water based 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.The methods do not apply to heated or chilled ceiling panels or beams.This standard is part 3 of a series of standards:-Part 1: Determination of the design heating and cooling capacity;-Part 2: Design, dimensioning and installation;-Part 3:Optimizing for use of renewable energy sources.The aim of the present standard is to give a guide for the design to promote the use of renewable energy sources and to provide a method for the use of Thermo-Active-Building-Systems (TABS). The method allows calculation of peak cooling capacity of a thermo-active system, based on heat gains (solar, internal loads, ventilation).This method also allows calculation of the energy demand on the water side (system) to be used for sizing of the cooling system, e.g. chiller, fluid flow rate.Steady state heating capacity is calculated according to method B or E of prEN 15377-1 (part 1 of this series of standards).