EN 15316-3-3:2007

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Heating systems in buildings - Method for calculation of system energy requirements and system efficiencies - Part 3-3: Domestic hot water systems, generationXþLQNRYLWRVWLSystemes de chauffage dans les bâtiments - Méthode de calcul des exigences énergétiques et des rendements du systeme - Partie 3.3 : Systemes d'eau chaude domestique, productionHeizsysteme in Gebäuden - Verfahren zur Berechnung der Energieanforderungen und Nutzungsgrade der Anlagen - Teil 3-3: Trinkwassererwärmung, ErzeugungTa slovenski standard je istoveten z:EN 15316-3-3:2007SIST EN 15316-3-3:2007en,de91.140.10Sistemi centralnega ogrevanjaCentral heating systemsICS:SLOVENSKI
STANDARDSIST EN 15316-3-3:200701-december-2007

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15316-3-3October 2007ICS 91.140.10 English VersionHeating systems in buildings - Method for calculation of systemenergy requirements and system efficiencies - Part 3-3:Domestic hot water systems, generationSystèmes de chauffage dans les bâtiments - Méthode decalcul des besoins énergétiques et des rendements dessystèmes - Partie 3-3 : Systèmes de production d'eauchaude sanitaire, générationHeizungsanlagen in Gebäuden - Verfahren zur Berechnungder Energieanforderungen und Nutzungsgrade der Anlagen- Teil 3-3: Trinkwassererwärmung, ErzeugungThis European Standard was approved by CEN on 18 August 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 15316-3-3:2007: E

Calculation of thermal loss from a gas or oil fired boiler
in systems other than for single family dwellings.20 A.1 Calculation of total boiler thermal loss.20 A.2 Calculation of heat loss during boiler operation.20 A.3 Calculation of stand-by heat loss.21 A.3.1 General.21 A.3.2 Average boiler temperature during a stand-by period.21 A.3.3 Load factor of a boiler.21 A.3.4 Auxiliary energy consumption for a boiler.22 A.3.5 Nominal output efficiency of a boiler.22 Annex B (informative)
Thermal loss from a gas fired domestic storage water heater.24 Annex C (informative)
Thermal loss from an electrical heated domestic
storage water heater (with continuous power on).26

Thermal loss from an electrical heated domestic storage water heater (with timed power on).27 Bibliography.31

EN 15316-1. This European Standard specifies the:  inputs;  calculation methods;  outputs. 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 15316-3-2, Heating systems in buildings — Method for calculation of system energy requirements and system efficiencies — Part 3-2 Domestic hot water systems, distribution prEN 50440, Efficiency of domestic electrical storage water-heaters 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 auxiliary energy electrical energy used by technical building systems for heating, cooling, ventilation and/or domestic hot water to support energy transformation to satisfy energy needs NOTE 1 This includes energy for fans, pumps, electronics etc. Electrical energy input to a ventilation system for air transport and heat recovery is not considered as auxiliary energy, but as energy use for ventilation. NOTE 2 In EN ISO 9488, the energy used for pumps and valves is called "parasitic energy". 3.2 building construction as a whole, including its envelope and all technical building systems, for which energy is used to condition the indoor climate, to provide domestic hot water and illumination and other services related to the use of the building

s Q quantity of heat, energy
J P electrical power W V volume
m3 W auxiliary (electrical) energy
J x, y, z constants - ϕ load factor
. part - η efficiency
- θ celsius temperature
°C X coefficient of relative quantity of energy delivered versus maximum energy stored -

stand-by del delivered meas measured sol solar dis distribution mn arithmetic mean st storage e external nd need Tot total em emission nom nominal ve ventilation gen generation off off W domestic hot water in input to system on on x indices ind independent out output from system
int internal p primary
5 Energy output of the domestic hot water generation sub-system 5.1 General The heat generator for a domestic hot water system shall provide the energy required for meeting the energy need for domestic hot water and for compensating the losses in the other sub-systems (e.g. distribution). The energy requirement on the heat generator is given by: lspWlsstWlsdisWWoutgenWQQQQQ,,,,,,,,+++= (MJ/day)
(1) where outgenWQ,, is the total generation output (MJ/day); WQ
is the domestic hot water requirement (see EN 15316-3-1) (MJ/day); lsdisWQ,,
is the thermal loss from domestic hot water distribution system (see EN 15316-3-2) (MJ/day); lsstWQ,,
is the thermal loss from the domestic hot water storage vessel (if present) (MJ/day); lspWQ,,
is the thermal loss from primary pipes (if present) (MJ/day). If the heat generator or generators also provide space heating, the performance of the heat generator shall be calculated separately for operation during the summer period, when there is no space heating demand, and operation during the winter period, when both space heating and domestic hot water is being provided. 5.2 Domestic hot water systems with a single heat generator If a single heat generator is applied, the total generation output has to be provided from that heat generator.

is the energy output of heat generator j during the time period considered (MJ); kindisWQ,,, is the energy input to the distribution system k during the time period considered (MJ). If more than one heat generator is applied, the total heat demand of the distribution system indisWQ,, is distributed amongst the available heat generators. The calculations are to be performed independently for each heat generator j on the basis of outgenWQ,, and jgenW,,α.

is the average temperature of stored water (oC); avgamb,θ
is the average ambient temperature (oC); sbystW,,θ∆ is the average temperature difference applied at stand-by heat loss tests (oC); sbystWQ,,
is the stand-by heat loss (MJ/day). The weekly, monthly or annual thermal losses are obtained by multiplying the thermal loss per day by the appropriate number of days. The stand-by heat loss of the storage vessel has to be measured in accordance with a European Standard or national standard, e.g. EN 12897, appropriate for the vessel size and type. The measured stand-by heat loss is based on the actual temperatures during the period of operation. The standard to be used for the measurement shall be specified in a national annex. If the stand-by heat loss of the storage vessel is not available, a value can be calculated on the basis of an equation of the form; zstWsbystWVyxQ,,,∗+= (MJ/day) (5) where stWV,
is the volume per vessel (litres); zandyx,
are constants. Values for the constanst x, y and z shall be given in a national annex. The stand-by heat loss from older storage vessels can be estimated in a similar way, where values for the constants x, y and z shall also be given in a national annex. Alternatively, a national annex may specify the stand-by heat loss based on storage volume and insulation type and thickness. If the hot water storage vessel is located within the heated space of the building, part of the storage thermal loss may be recovered (see Clause 10). Connecting pipes to the storage water heater may increase the storage thermal loss, particularly if the pipes are not insulated. These additional losses are caused by circulation set up in the connecting pipes between

EN 15316-3-2 shall be followed for the primary circulation pipes. Calculation of the thermal losses from the primary circulation pipes should be based on the actual length of the pipes, if available. If the detailed pipe network plan is not available, representative values for the pipe lengths can be applied. These values shall be given in a national annex. 8 Direct heated domestic hot water generation devices 8.1 General Energy labelling legislation requires efficiency measurements to be obtained fo
...