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BS EN ISO 21654:2021

BS EN ISO 21654:2021

$198.66

Solid recovered fuels. Determination of calorific value

Published By Publication Date Number of Pages
BSI 2021 70
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This document specifies a method for the determination of gross calorific value of solid recovered fuels at constant volume and at the reference temperature 25 Ā°C in a combustion vessel calorimeter calibrated by combustion of certified benzoic acid.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 European foreword
Endorsement notice
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Principle
4.1 Gross calorific value
11 4.2 Net calorific value
5 Reagents
12 6 Laboratory conditions
13 7 Apparatus
7.1 General
15 7.2 Auxiliary equipment
7.3 Balances
16 8 Preparation of test sample
9 Calorimetric procedure
9.1 General
17 9.2 Preparing the combustion vessel for measurement
9.2.1 General procedure
18 9.2.2 Using combustion aids
19 9.3 Assembling the calorimeter
9.4 Combustion reaction and temperature measurements
20 9.5 Analysis of products of combustion
9.6 Corrected temperature rise ļæ¼
9.6.1 Observed temperature rise
9.6.2 Isoperibol and staticā€‘jacket calorimeters
22 9.6.3 Adiabatic calorimeters
9.6.4 Thermometer corrections
9.7 Reference temperature
10 Calibration
10.1 Principle
23 10.2 Calibration reference
10.2.1 Certification conditions
10.2.2 Calibration conditions
10.3 Valid working range of the effective heat capacity ļæ¼
24 10.4 Ancillary contributions
10.5 Calibration procedure
25 10.6 Calculation of effective heat capacity for the individual experiment
10.6.1 Constant massā€‘ofā€‘calorimeterā€‘water basis
10.6.2 Constant totalā€‘calorimeterā€‘mass basis
26 10.7 Precision of the mean value of the effective heat capacity ļæ¼
10.7.1 Constant value of ļæ¼
27 10.7.2 ļæ¼ as a function of the observed temperature rise
10.8 Repetition of the determination of effective heat capacity
11 Gross calorific value
11.1 General
28 11.2 Combustion
11.3 Calculation of gross calorific value
11.3.1 General
11.3.2 Constant massā€‘ofā€‘calorimeterā€‘water basis
30 11.3.3 Constant totalā€‘calorimeterā€‘mass basis
31 11.3.4 ļæ¼ as a function of the observed temperature rise
11.4 Expression of results
11.5 Calculation to other bases
32 12 Precision
12.1 Repeatability limit
12.2 Reproducibility limit
13 Calculation of net calorific value at constant pressure
13.1 General
13.2 Calculations
33 14 Test report
35 Annex A (normative) Adiabatic combustion vessel calorimeters
39 Annex B (normative) Isoperibol and static-jacket combustion vessel calorimeters
44 Annex C (normative) Automated combustion vessel calorimeters
47 Annex D (normative) Removed ash contributors
50 Annex E (informative) Checklists for the design and procedures of combustion experiments
55 Annex F (informative) Examples to illustrate the main calculations used in this document if an automated (adiabatic) combustion vessel calorimeter is used for determinations
58 Annex G (informative) List of symbols used in this document
61 Annex H (informative) Flow chart for a routine calorific value determination
62 Annex I (informative) Interlaboratory test results
65 Annex J (informative) Additional terms for the basis of results expression
66 Annex K (informative) Environmental aspects
68 Bibliography

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BS EN ISO 21654:2021
$198.66