EN 15150:2011

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Feste Biobrennstoffe - Bestimmung der PartikeldichteCombustibles solides - Détermination de la masse volumique des particulesSolid biofuels - Determination of particle density75.160.10Trda gorivaSolid fuelsICS:Ta slovenski standard je istoveten z:EN 15150:2011SIST EN 15150:2011en,fr,de01-december-2011SIST EN 15150:2011SLOVENSKI
STANDARDSIST-TS CEN/TS 15150:20051DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15150
November 2011 ICS 75.160.10 Supersedes CEN/TS 15150:2005English Version
Solid biofuels - Determination of particle density
Biocombustibles solides - Détermination de la masse volumique des particules
Feste Biobrennstoffe - Bestimmung der Partikeldichte This European Standard was approved by CEN on 18 September 2011.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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.
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B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15150:2011: ESIST EN 15150:2011

Stereometric volume estimation . 12Bibliography . 14 SIST EN 15150:2011

"Solid biofuels", the secretariat of which is held by SIS. 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of an identical text or by endorsement, at the latest by May 2012, and conflicting national standards shall be withdrawn at the latest by May 2012. 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 supersedes CEN/TS 15150:2005. 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, Croatia, 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.
EN 14774-2, Solid biofuels – Determination of moisture content – Oven dry method – Part 2: Total moisture – Simplified method 3 Terms and definitions For the purpose of this document, the terms and definitions given in EN 14588 apply. 4 Principle Both mass and volume of an individual particle or a group of particles are determined. The volume is measured by determining the buoyancy in a liquid. This procedure follows the physical principle that the buoyancy of a body is equal to the weight of the displaced volume of a liquid. The apparent loss in weight between a measurement in air and a subsequent measurement in liquid marks its buoyancy. The volume of the sample body is calculated via the density of the applied liquid.
NOTE The particle density of briquettes could also be estimated by stereometric means (see informative Annex A). This estimation could also be made if pellets are cut to determine their volume by stereometric means. Be aware of a higher variability between the replications when applying the stereometric measuring principle. 5 Reagents 5.1 Water with low content of ions (e.g. drinking water quality) in a temperature range of 10 °C to 30 °C. 5.2 A detergent named O-[4-(1,1,3,3-Tetramethylbutyl)-phenyl]-deca(oxyethylen), Octylphenoldecaethylen-glycolether, Polyethylenglycol-mono-[p-(1,1,3,3-tetramethylbutyl)-phenyl]-ether. SIST EN 15150:2011

5.3 Paraffin with a melting point of 52 °C to 54 °C. 6 Apparatus 6.1 General apparatus requirements 6.1.1 Thermometer for liquids having a measuring accuracy of 1 °C 6.1.2 Facilities for moisture content determination according to EN 14774-1 or EN 14774-2 6.2 Apparatus for pellet testing 6.2.1 A balance, having sufficient accuracy to determine the weight to the nearest 0,001 g. Due to the high sensitivity of the balance, the test rig shall be placed into a wind protection cabinet to allow undisturbed and immediate reading of the displayed values. 6.2.2 A transparent beaker glass of about 200 ml filling volume. 6.2.3 A density determination rig which can be placed on the balance. The rig consists of a bridge which overstretches the weighing plate of the balance in order to prevent the balance from being loaded. The bridge is capable of carrying the beaker glass (6.2.2). Through a supporting frame with suspension rods a weighing dish ("submergence dish") is hung into the beaker glass (Figure 1) which is filled with liquid. The dish shall be able to accommodate at least four pellets at once. Both, the supporting frame and the submergence dish are directly loaded on the balance plate. The submergence apparatus (the dish and the suspension) can be removed for being loaded with pellets. Through the dish suspension, the submergence depth is always kept constant. The bottom of the submergence dish is perforated by openings which are smaller in diameter than the diameter of the pellets. This perforation allows the liquid to fill the dish from underneath when it is submerged. If sample material of low density shall be applied (below 1,0 g/cm3) a modified suspension having an inverted submergence dish is required; this is to force the pellets underneath the liquid surface and prevent them from floating atop of the liquid. For the determination of the mass in air it is useful to use a combined test rig where an additional upper weighing dish is fixed to the suspension (Figure 1).
Key 1 weighing dish (weighing in air) 2 pellets
3 bridge 4 perforated submergence dish (weighing in water) 5 weighing plate (balance) 6 beaker glass 7 dish suspension 8 supporting frame Figure 1 — Buoyancy determination rig on a balance (method for pellets) 6.3 Apparatus for briquette testing 6.3.1 A balance, having sufficient accuracy to determine the weight to the nearest 0,01 g. If briquettes of more than 500 g each are tested the accuracy of the balance can be reduced to 0,1 g. The balance must have a connecting point for hanging a weight to its load cell.
6.3.2 A transparent container for liquids having a sufficient filling volume to accommodate the liquid and the submerged briquette.
NOTE A sufficient filling volume is usually achieved when the container's cross section is about 8 times larger than the cross section of the briquette. In this case any effects by level changes of the liquid caused by submersion of the briquette are negligible. Such error would be due to a larger part of the holding steel string (see 6.3.3) being submerged.
6.3.3 A non absorbent thin steel string which can be hung to the connecting point of the balance. The end of the string is equipped with a hook or a ring, which allows an easy appending of the sample.
6.3.4 A tripod where the balance can be placed on. The tripod must have a plate with an opening which allows the string to pass through unhindered while hanging to the balance (Figure 2). SIST EN 15150:2011

Key 1 carrying plate with opening 2 balance 3 steel string 4 liquid container
5 test sample (briquette) 6 connecting ring or hook 7 tripod Figure 2 — Buoyancy determination rig using a hanging load to a balance (method for briquettes)
7 Sample preparation 7.1 Sampling and sample preparation shall be done in accordance with EN 14778 and EN 14780. 7.2 A total sample weight of 500 g (pellets with a diameter equal to or below 12 mm) or 1 000 g for pellets with a diameter above 12 mm or a minimum of 15 briquettes is required. SIST EN 15150:2011

7.4 For low density and coarse textured briquettes a rapid disintegration after submergence in the liquid may happen, thus the reading may be difficult to take. The sample can then be coated by submerging in liquid paraffin (5.3), preferable at a temperature of 90 °C.
NOTE Be aware of the additional volume, which reduces the density slightly.
8.1.2 Add 1,5 grams per litre of the detergent (5.2) to the water in the beaker glass and stir until full homogeneity of the liquid is achieved. Position the beaker glass with the liquid onto the bridge. NOTE 1 At 1,5 grams per litre of the above detergent the critical micelle concentration in water (xCMC=0,15 g/l) is exceeded by ten times. It is advised to use a magnetic stirring device for better homogeneity.
8.1.3 Check the temperatur
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