EN 15243:2007

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 General approach
6 Room temperature calculation without room
   conditioning system
   6.1 Choice of rooms
   6.2 Calculation method
   6.3 Boundary conditions
7 Room cooling load calculation
   7.1 Basic sensible room cooling load calculation
   7.2 System dependent sensible room cooling load calculation
   7.3 Latent room cooling load calculation
   7.4 Boundary conditions
8 Room heating load calculation
   8.1 Calculation procedure
   8.2 Climatic data
   8.3 Ventilation rates
9 Room based equipment sizing
10 Zone load calculation
11 System heating and cooling load calculation
12 Central system equipment sizing
13 Room and building energy calculation
   13.1 General
   13.2 Humidification and dehumidification energy demand
   13.3 Relation to system energy calculation methods
14 System energy calculation
   14.1 General approach
   14.2 Required functionality of detailed and simplified
        calculation methods
   14.3 Simplified system losses and energy demand
        calculation methods
   14.4 Detailed system losses and energy demand calculation
        method
Annex A (informative) - Best procedure for design process
Annex B (informative) - Proposed procedure for choice or typical
                        rooms for temperature calculation
Annex C (informative) - System overview
Annex D (informative) - Schematic relationship between HVAC
                        system energy procedure, building energy
                        demand calculations, data and outputs
Annex E (informative) - Example simplified system losses and
                        energy demand calculation methods
    E.1 Example 1 (Dutch proposal)
    E.2 Example 2 (German proposal)
    E.3 Example 3: Monthly HVAC system cooling energy
        calculations using degree-day methods
Annex F (informative) - EDR Verification of building and
                        installation calculation methods
    F.1 Introduction
    F.2 Method description
    F.3 EDR Calculation method for reference values
Annex G (informative) - Example values for emission losses
    G.1 Zones including several groups
    G.2 Control accuracy
Annex H (informative) - Calculation of latent energy demand
    H.1 Presentation
    H.2 Application for hourly calculation
Annex I (informative) - Example Calculation of Seasonal
                        Efficiency of Cold Generators and
                        Chillers in Air Conditioning Systems
    I.1 Introduction
    I.2 Theory
    I.3 Practical application
    I.4 Illustrative example of estimation of seasonal EER
    I.5 Example for calculated part-load-values
Annex J (informative) - Auxiliary energy for cooling-water
                        and cold-water distribution
    J.1 Electrical energy demand
    J.2 Hydraulic energy demand for distribution
    J.3 Demand coefficients
    J.4 Other auxiliary energy demands (auxiliary drives)
    J.5 Guideline for calculating the electrical energy demand
        of cooling-water and cold-water distribution systems
Annex K (informative) - Thermal and dehumidification
                        distribution losses in cooling systems
    K.1 Cooling for the HVAC system
    K.2 Cooling energy supply for space cooling
Annex L (informative) - Auxiliary energy use by terminals
    L.1 Energy demand for space cooling - fans
Annex M (informative) - Auxiliary energy demand, heat rejection
    M.1 Calculation
    M.2 Partial-load index values of heat rejection systems
Bibliography

The scope of this European Standard is-To define the procedure how the calculation methods to determine the temperatures, sensible loads and energy demands for the rooms shall be used in the design process.-To describe the calculation methods to determine the latent room cooling and heating load, the building heating, cooling, humidification and dehumidification loads and the system heating, cooling, humidification and dehumidification loads.-To define the general approach for the calculation of the overall energy performance of buildings with room conditioning systems-To describe one or more simplified calculation methods for the system energy requirements of specific system types, based on the building energy demand result from prEN ISO 13790, and to define their field of application.A general framework standard is given which imposes an hourly calculation for all cases which cannot be covered by simplified methods, and gives requirements on what has to be taken into account. Input and output data are defined.The target audience of this standard is twofold:-Designers of HVAC systems, which are given an overview of the design process with the relevant references to the different involved standards (Clauses 5 to 12)-Developers of regulations and tools, which find requirements for calculation procedures to be used for the energy requirements according to the EPBD (Clauses 13 and 14).The idea followed by this standard is, that for the detailed approach one single calculation method is used for the different room related purposes such as room temperature calculation, room cooling and heating load calculation, and room energy calculation. This means, for the building type envisaged (buildings with room conditioning systems) it is an alternative to simplified calculation methods such as heating load according to EN 12831 and heating energy according to prEN ISO 13790. This standard does not describe any detailed methods for the sensible room based