SIST EN 15181:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bestimmung des Energieverbrauchs von GasbacköfenMéthode de mesurage de la consommation d'énergie des fours a gazMeasuring method of the energy consumption of gas fired ovens97.040.20Cooking ranges, working tables, ovens and similar appliancesICS:Ta slovenski standard je istoveten z:EN 15181:2008SIST EN 15181:2008en01-december-2008SIST EN 15181:2008SLOVENSKI
STANDARD



SIST EN 15181:2008



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15181October 2008ICS 97.040.20 English VersionMeasuring method of the energy consumption of gas fired ovensMéthode de mesurage de la consommation d'énergie desfours à gazBestimmung des Energieverbrauchs von GasbacköfenThis European Standard was approved by CEN on 13 September 2008.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© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15181:2008: ESIST EN 15181:2008



EN 15181:2008 (E) 2 Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.5 4 List of measurements.6 4.1 Dimensions.6 4.2 Energy consumption and heating time.6 5 General conditions for measurements.6 5.1 General.6 5.2 Ambient temperature.7 5.3 Test gases and test pressures.8 5.4 Electrical supply.8 5.5 Load.8 5.6 Instrumentation.8 5.7 Positioning of the appliance.9 5.8 Auxiliary electrical energy.9 6 Useful oven volume.9 7 Energy consumption and time.9 7.1 Measurement of oven temperature.9 7.2 Energy consumption and time for heating a load.9 7.2.1 Purpose.9 7.2.2 Preparation.10 7.2.3 Measurement.10 8 Data to be provided for the technical file.13 9 Uncertainty and verification procedures.14 9.1 Energy consumption.14 9.2 Oven volume.14 Annex A (normative)
Description of the test brick and position of the thermocouples.16 A.1 Specification.16 A.2 Position of the thermocouples.16 Annex B (informative)
Explanation of the formulae.18 B.1 Explanation of the Formulae Subscripts.18 B.2 Explanation of the Formulae Superscripts.18 Annex C (normative) Calculation sheet.19 Annex D (informative)
Example of Supplier and Order Specification.21 Bibliography.22
SIST EN 15181:2008



EN 15181:2008 (E) 3 Foreword This document (EN 15181:2008) has been prepared by Technical Committee CEN/TC 49 “Gas cooking appliances”, the secretariat of which is held by UNI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2009, and conflicting national standards shall be withdrawn at the latest by April 2009. 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. This document is suitable for direct comparison and is considered sufficiently reproducible within given limits for the purpose of energy labelling according to the European Union Directive 92/75/EEC on ”Indication by labelling and standard product information of the consumption of energy and other resources by household appliances“. 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. SIST EN 15181:2008



EN 15181:2008 (E) 4 Introduction The object of this European Standard is to specify, in accordance with the European Union Directive 92/75/EEC on ”Indication by labelling and standard product information of the consumption of energy and other resources by household appliances“:  energy consumption using a standardised load during a standardised procedure;  some performance characteristics (like volume….);  permitted tolerances to values declared by the manufacturer and control procedures for checking the declared values. SIST EN 15181:2008



EN 15181:2008 (E) 5
1 Scope This standard specifies the method of test for determining the gas energy consumption in gas-fired domestic ovens when they are being used in one or more of the oven cooking modes defined in 3.1. It applies to the gas-fired domestic ovens which are capable of utilising gases of group H or group E, possibly after conversion according to manufacturer’s instructions. It applies to these gas-fired domestic ovens, whether they are separate appliances or component parts of domestic cooking appliances. It also applies to domestic appliances that can utilise gas and/or electrical energy to provide heat for cooking when the ovens are utilising gas energy to provide heat for cooking, but not when electric energy is used to provide any or all of the heat for cooking in the oven. It is not applicable to:  microwave combination ovens;
 small cavity ovens (3.2);  ovens without adjustable temperature control;
 cooking modes others than defined in 3.1.1 and 3.1.2;
 ovens connected to a chimney in which the gas energy for cooking also, by design, provides space and/or water heating;  appliances designed for use with gases of the third family only.
This standard is concerned neither with safety nor with performance requirements. 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 30-1-1:2008, Domestic cooking appliances burning gas fuel – Part 1-1: Safety – General EN 30-1-2:1999, Domestic cooking appliances burning gas – Part 1-2: Safety – Appliances having forced-convection ovens and/or grills EN 30-1-4:2002, Domestic cooking appliances burning gas – Part 1-4: Safety – Appliances having one or more burners with an automatic burner control system EN 60584-2, Thermocouples – Part 2: Tolerances (IEC 60584-2:1982) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 30-1-1:2008, EN 30-1-2:1999 or EN 30-1-4:2002 and the following apply. SIST EN 15181:2008



EN 15181:2008 (E) 6 NOTE EN 30-1-1:2008, EN 30-1-2:1999 or EN 30-1-4:2002 apply if the appliance falls within the scope of that standard.
3.1 oven cooking modes
3.1.1
conventional oven cooking mode operation of the oven for cooking roasts, pastry, etc., in which the transmission of heat is achieved by natural convection and radiation 3.1.2 forced-convection oven cooking mode operation of the oven for cooking roasts, pastry, etc., in which the transmission of heat by convection is assisted by means of a fan 3.2 small cavity ovens oven with the following dimensions related to the usable volume:  both width and depth < 250mm  or height < 120 mm NOTE The definition of small cavity ovens in this standard is due to the size of the artificial standard load. 3.3 multiple cavity appliances appliance that has more than one separate oven cavity in which food is cooked and which can be controlled independently, but cannot be installed separately 3.4 auxiliary electrical energy electrical energy consumption (during the brick test) of any electric components that cannot be switched off from the control panel by the user when using the oven in accordance with the manufacturer's instructions 4 List of measurements 4.1 Dimensions
Dimensions of the useful oven volume (see Clause 6). 4.2 Energy consumption and heating time Heating of the load (see Subclause 7.2). 5 General conditions for measurements 5.1 General According to good laboratory practice, before installation, it shall be checked that the appliance is free from damage and complies with 6.1.1: leakage, of EN 30-1-1:2008, EN 30-1-2:1999 or EN 30-1-4:2002, as applicable. The manufacturer's instructions regarding installation of the oven shall be followed.
SIST EN 15181:2008



EN 15181:2008 (E) 7 Prior to every test the whole appliance (this includes the material and the insulation) shall be at ambient temperature. In multiple cavity appliances each oven cavity has to be measured separately. Only the cavity measured shall be switched on. In case an oven has several cooking modes as described in Clause 3, the manufacturer can choose the variant to be tested. This has to be reported (see Clause 8). Unless otherwise specified, measurements are conducted under the following conditions: 5.2 Ambient temperature The tests are carried out in a substantially draught-free room in which the ambient temperature is maintained at (23 + 2) °C during the complete test. NOTE A change in the ambient temperature of the room during the test could affect the results. Care should be taken during the test to ensure that the ambient temperature is as steady as possible.
This ambient temperature is measured at a point that is at the same height as the centre of the useful oven volume of the oven cavity and at a distance of 0,5 m diagonally from one of the front edges of the appliance, see Figure 1.
The measurement of the ambient temperature shall not be influenced by the oven itself or by any other appliance.
Dimensions in mm
Key 1 top view 2 oven 3 thermocouple Figure 1 - Position of the thermocouple SIST EN 15181:2008



EN 15181:2008 (E) 8 5.3 Test gases and test pressures The appliance is fitted with the appropriate injector(s) for utilisation of gas group H or gas group E. The primary air adjuster, if any, shall be adjusted according to the technical instructions. The appliance is then supplied with G 20, with a composition of at least 95 % methane, at a pressure of 20 mbar. 5.4 Electrical supply The supply voltage shall be maintained at 230 V + 1%. The supply frequency shall be at 50Hz + 1%. 5.5 Load The load for test 7.2 shall be a brick with two holes for temperature measurements as shown in Annex A. A new brick shall be dried before using it for the first time in forced air circulation in an oven of about 50 l volume at > 175 °C for three hours. No more than two bricks shall be dried at the same time in the same oven. The mass md
of the completely dry brick without thermocouples shall be measured within 5 min after removal from the oven and shall be noted in grams. The dry mass md shall be in accordance with the dry mass specified in Annex A. The brick shall be identified with a reference number for accurate calculation of the water absorption according to 7.2.2. Place markings 32 mm from the measuring point of the two thermocouples with steel tube and insert the thermocouples into the holes until the marking matches with the surface of the brick. The thermocouples shall be fixed to ensure that the measuring points remain at a depth of 32 mm during the whole test procedure. NOTE 1 The weighing machine should be protected from the effects of the hot brick. NOTE 2 The thermocouples may be fixed by means of a droplet of silicon glue at the surface of the brick or by other suitable means. NOTE 3 Care should be taken that the measuring point is the first contact point of the two thermowires. NOTE 4 Between test series the brick should be stored in a refrigerator, preferably not soaked with water. The brick soaking water should be kept (to reduce dissolving processes); i.e. re-use of the brick storage water. A brick that has already been soaked in water needs at least eight hours to dry out as described above. NOTE 5 Due to the porosity of the brick care should be taken that the holes of the brick are not enlarged if the thermocouples are removed and reinserted.
NOTE 6 A brick can be used for about 20 tests when handled with normal care.
5.6 Instrumentation Air temperature measurements in the empty oven are made with a thermocouple with a welded point (not with a black copper plate), class 1, type K. Room temperature measurements are made with a thermocouple, class 1, type T. NOTE 1 Other types of thermocouple may be used for the measurement of room temperatures provided they are known to provide equivalent or better accuracy and reproducibility than a type T. Temperature measurements in the load are made with two thermocouples with 1 mm steel tube diameter, class 1, according to EN 60584-2. The thermocouple shall be accurate to + 1,5 K. NOTE 2 The steel tube of the thermocouple eases the insertion of the thermocouple into the brick. See also NOTE 2 in 5.5. SIST EN 15181:2008



EN 15181:2008 (E) 9 The temperature measurement system excluding the thermocouple shall be accurate to + 1,0 K. The determination of the heat input and the consumption shall be made at an accuracy
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