TP129 - Uredba o obveznih meritvah na proizvodnih napravah, ki prejemajo za proizvedeno električno energijo potrdila o izvoru in podpore

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ISO/IEC 17025:2017 is applicable to all organizations performing laboratory activities, regardless of the number of personnel.
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This Technical Specification determines the fuel quality classes and specifications for solid biofuels. According to the mandate given for the standardisation work, the scope of the Technical Specification (TC335) only includes solid biofuels originating from the following sources:
-   products from agriculture and forestry;
-   vegetable waste from agriculture and forestry;
-   vegetable waste from the food processing industry;
-   wood waste, with the exception of wood waste which may contain halogenated organic compounds or heavy metals as a result of treatment with wood preservatives or coating, and which includes in particular such wood waste originated from construction and demolition waste;
-   fibrous vegetable waste from virgin pulp production and from production of paper from pulp, if it is co-incinerated at the place of production and heat generated is recovered;
-   cork waste.
NOTE   For the avoidance of doubt, demolition wood is not included in the scope of this Technical Specification.
Demolition wood is "used wood arising from demolition of buildings or civil engineering installations" (CEN/TS 14588).

This Technical Specification defines the procedures to fulfil the quality requirements and describes measures to ensure adequate confidence that the biofuel specification is fulfilled. This Technical Specification covers the whole chain, from supply of raw materials to point of delivery to the end-user.
According to the mandate given for the standardisation work, the scope of the Technical Committee (TC 335) only includes solid biofuels originating from the following sources:
-   products from agriculture and forestry;
-   vegetable waste from agriculture and forestry;
-   vegetable waste from the food processing industry;
-   wood waste, with the exception of wood waste which may contain halogenated organic compounds or heavy metal as a result of treatment with wood preservatives or coating, and which includes in particular such wood waste originated from construction and demolition waste;
-   fibrous vegetable waste from virgin pulp production and from the production of paper from pulp, if it is co-incinerated at the place of production and heat generated is recovered;
-   cork waste.
NOTE 1: The quality assurance systems applied to the operation of conversion plants fuelled by solid biofuels are outside the scope of this Technical Specification.
NOTE 2: Health, safety and environmental issues for solid biofuels are important and need special attention, however are outside the scope of this Technical Specification.
NOTE 3: For the avoidance of doubt, demolition wood is not included in the scope of this Technical Specification. Demolition wood is defined as "used wood arising from demolition of buildings or civil engineering installations" (CEN/TS 14588).

This Technical Specification specifies a method for the determination of the gross calorific value of a solid biofuel at constant volume and at the reference temperature 25 °C in a bomb calorimeter calibrated by combustion of certified benzoic acid.
The result obtained is the gross calorific value of the analysis sample at constant volume with all the water of the combustion products as liquid water. In practice, biofuels are burned at constant (atmospheric) pressure and the water is either not condensed (removed as vapour with the flue gases) or condensed. Under both conditions, the operative heat of combustion to be used is the net calorific value of the fuel at constant pressure. The net calorific value at constant volume may also be used; formulae are given for calculating both values.
General principles and procedures for the calibrations and the biofuel experiments are presented in the main text, whereas those pertaining to the use of a particular type of calorimetric instrument are described in annexes A to C. Annex D contains checklists for performing calibration and fuel experiments using specified types of calorimeters. Annex E gives examples to illustrate some of the calculations.