EN 15243:2007

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Ventilation for buildings - Calculation of room temperatures and of load and energy for buildings with room conditioning systemsVentilation des bâtiments - Calculation des températures des locaux et des charges et énergies pour les bâtiments avec des systemes de conditionnement des locauxLüftung von Gebäuden - Berechnung der Raumtemperaturen und der Last und Energie für Gebäude mit Systemen zur RaumkonditionierungTa slovenski standard je istoveten z:EN 15243:2007SIST EN 15243:2007en91.140.30VLVWHPLVentilation and air-conditioningICS:SLOVENSKI
STANDARDSIST EN 15243:200701-november-2007

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15243August 2007ICS 91.140.30 English VersionVentilation for buildings - Calculation of room temperatures andof load and energy for buildings with room conditioning systemsSystèmes de ventilation des bâtiments - Calcul de latempérature des pièces, de la charge et de l'énergie pourles bâtiments équipés de système de climatisationLüftung von Gebäuden - Berechnung derRaumtemperaturen, der Last und Energie für Gebäudenmit KlimaanlagenThis European Standard was approved by CEN on 6 July 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15243:2007: E

Best procedure for design process.41 Annex B (informative)
Proposed procedure for choice or typical rooms for temperature calculation.43 Annex C (informative)
System overview.44 Annex D (informative)
Schematic relationship between HVAC system energy procedure, building energy demand calculations, data and outputs.51 Annex E (informative)
Example simplified system losses and energy demand calculation methods.60 E.1 Example 1 (Dutch proposal).60 E.1.1 Emission losses.60 E.1.2 Distribution losses.60 E.1.3 Storage losses.64 E.1.4 Generation efficiency and energy consumption.64 E.1.5 HVAC system annual energy consumption.66 E.2 Example 2 (German proposal).67 E.2.1 Scope.67 E.2.2 Method.67 E.2.3 Application for the territory of federal republic of Germany.68 E.2.4 Specific guide values.73 E.2.5 Energy demand for air transport.79 E.2.6 Conversion and calculation of specific values.79 E.2.7 Example.83 E.3 Example 3: Monthly HVAC system cooling energy calculations using degree-day methods.85 E.3.1 Theory.85 E.3.2 Worked example.89 Annex F (informative)
EDR Verification of building and installation calculation methods.93 F.1 Introduction.93 F.1.1 General.93 F.1.2 Brief description of EDR.93 F.1.3 How to obtain the attest (quality certificate).95 F.1.4 Importance of EDR.96 F.1.5 Relations: EDR, CEN, ISO, IEA HVAC BESTEST etc.96 F.2 Method description.96 F.2.1 General.96 F.2.2 Functionality Matrix.97 F.2.3 Masks.98 F.2.4 Reference/Test cases.98 F.2.5 Results of reference cases should fall within certain ranges.98 F.2.6 Example of the Functionality Matrix.98 F.2.7 Example: Mask – generation of cold.102 F.3 EDR Calculation method for reference values.103 F.3.1 Introduction.103 F.3.2 Centre of the reference area.103 F.3.3 Structure of the reference area.103 F.3.4 Size of the reference area (bandwidth).103

Example values for emission losses.105 G.1 Zones including several groups.105 G.2 Control accuracy.106 Annex H (informative)
Calculation of latent energy demand.107 H.1 Presentation.107 H.2 Application for hourly calculation.108 Annex I (informative)
Example Calculation of Seasonal Efficiency of Cold Generators and Chillers in Air Conditioning Systems.111 I.1 Introduction.111 I.2 Theory.111 I.2.1 The objective.111 I.2.2 Combination of load frequencies and part-load performance measurements.112 I.2.3 Seasonal performance indices.113 I.2.4 Calculation of representative EIRs.113 I.2.5 Multiple chillers.113 I.2.6 Calculations for systems.113 I.3 Practical application.114 I.3.1 Background.114 I.3.2 Simplification of load frequency data.115 I.3.3 Approximation of chiller performance data.116 I.4 Illustrative example of estimation of seasonal EER.118 I.4.1 General.118 I.4.2 Load frequency distributions.118 I.4.3 Combined chiller performance.119 I.4.4 Mapping the chiller ratings on to the load frequency.120 I.5 Example for calculated part-load-values.123 Annex J (informative)
Auxiliary energy for cooling-water and cold-water distribution.127 J.1 Electrical energy demand.127 J.1.1 General.127 J.1.2 Electrical energy demand of distribution.129 J.2 Hydraulic energy demand for distribution.130 J.2.1 General.130 J.2.2 Pressure head at the design-rating operating point.131 J.2.3 ∆∆∆∆p approximation values.132 J.2.4 Pump operating times.133 J.2.5 Mean distribution load.134 J.2.6 Correction factor
fAbgl for hydraulic adjustment.135 J.3 Demand coefficients.136 J.3.1 General.136 J.3.2 Efficiency factor fe of the pump.136 J.3.3 Correction factor
fAdap for adaptation.137 J.3.4 Pump power adaptation during operation.137 J.3.5 Switching of individual pumps in parallel-pump installations.138 J.4 Other auxiliary energy demands (auxiliary drives).138 J.4.1 Pump heating registers.138 J.4.2 Pumps and drives for heat recovery.138 J.4.3 Water humidifier pumps.139 J.4.4 Electrical energy demand for central HVAC unit controls.140 J.5 Guideline for calculating the electrical energy demand of cooling-water and cold-water distribution systems.140 J.5.1 General.140 J.5.2 Specific volume flow in the distribution circuit.141 J.5.3 Pressure head ∆∆∆∆pZ at the design-rating operating point.141 J.5.4 Annual pump operating times ∑ld,t.143 J.5.5 Specific electrical power of distribution.143 J.5.6 Electrical energy demand of distribution.143

Thermal and dehumidification distribution losses in cooling systems.145 K.1 Cooling for the HVAC system.145 K.2 Cooling energy supply for space cooling.146 Annex L (informative)
Auxiliary energy use by terminals.148 L.1 Energy demand for space cooling – fans.148 Annex M (informative)
Auxiliary energy demand, heat rejection.149 M.1 Calculation.149 M.2 Partial-load index values of heat rejection systems.152 Bibliography.154

Existing national regulations with or without reference to national standards, may restrict for the time being the implementation of the European Standards mentioned in this report. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

The boundaries and relations between the covered areas are shown in Figure 1.
Figure 1 — Chart showing the relations to other standards related to the EPBD 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 13779, Ventilation for non-residential buildings — Performance requirements for ventilation and room-conditioning systems EN 15026, Hygrothermal performance of building components and building elements — Assessment of moisture transfer by numerical simulation EN 15241, Ventilation for buildings — Calculation methods for energy losses due to ventilation and infiltration in commercial buildings EN 15242:2007, Ventilation for buildings — Calculation methods for the determination of air flow rates in buildings including infiltration EN 15251, Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics

3.9 zone group of rooms forming part of a building, assigned to a system 3.10 zone cooling load daily profile of the energy flowrate to be extracted from a zone NOTE It is calculated by superposition of the room cooling load profiles 3.11 zone heating load daily profile of the energy flowrate to be added to a zone for heating purposes NOTE It is calculated by superposition of the room heating load profiles 3.12 zone humidification load daily profile of the energy flowrate to be added to a zone for humidification purposes NOTE It is calculated by superposition of the room humidification load profiles 3.13 system set of HVAC components which provides heating, cooling, humidification and dehumidification energy to a zone in order to meet the comfort conditions in the rooms NOTE The system boundaries are at the emission/extraction of heat and/or conditioned air to the rooms, the envelope of the system (leakage and/or heat transfer) and the energy delivered to the system in form of fuel and/or electricity. Intermediate boundaries may be necessary for calculation purposes 3.14 system cooling load daily profile of the energy flowrate to be extracted from a system under design conditions taking into account the system impact 3.15 system heating load daily profile of the energy flowrate to be added to a system under design conditions which meets the zone heating load, taking into account the system impact 3.16 system cooling capacity maximum heat extraction flowrate of a system under specified conditions 3.17 system heating capacity maximum heat addition flowrate of a system under specified conditions 3.18 room cooling energy demand energy amount to be extracted from the room in order to keep its comfort conditions within a defined range throughout the year under typical meteorological conditions

J x Absolute humidity kg/kg dry air θ Temperature °C θii initial internal temperature °C δθvsζspatial variation of temperature K δθvtζcontrol accuracy K ρ Density kg/m3

Table 2 — Indices symbol Name a Air aux auxiliary
c Cooling d Distribution dem Demand e Emission entr Entering f Floor g Generation h Heating hum Humidifier i Internal ii Initial internal loss Losses Ia interaction
in input to subsystem prim Primary r Refrigerant recirc Recirculation s Storage sat Saturation sea Seasonal sens Sensible start At starting time tot Total out output of subsystem w Water (E) Electricity – indicating the fuel type for delivered energy (G) Gas – indicating the fuel type for delivered energy (O) Oil – indicating the fuel type for delivered energy

Figure 2 — Flow chart for general approach (all dotted steps and loops are optional)
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