Solid mineral fuels - Determination of gross calorific value by the bomb calorimetric method and calculation of net calorific value

ISO 1928:2009 specifies a method for the determination of the gross calorific value of a solid mineral fuel at constant volume and at the reference temperature of 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, fuel is burned at constant (atmospheric) pressure and the water is not condensed but is removed as vapour with the flue gases. Under these conditions, the operative heat of combustion is the net calorific value of the fuel at constant pressure. The net calorific value at constant volume can also be used; equations are given for calculating both values.General principles and procedures for the calibrations and the fuel tests are presented in the main text, whereas those pertaining to the use of a particular type of calorimetric instrument are described in annexes. Checklists for performing calibration and fuel tests using specified types of calorimeters and examples illustrating some of the calculations are also given.

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Main informations

Collections

National standards and national normative documents

Publication date

January 2011

Number of pages

67 p.

Reference

NF ISO 1928

ICS Codes

75.160.10 Solid fuels

Classification index

M03-005

Print number

1 - 11/01/2011

International kinship

ISO 1928:2009

Sumary

Solid mineral fuels - Determination of gross calorific value by the bomb calorimetric method and calculation of net calorific value

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, fuel is burned at constant (atmospheric) pressure and the water is not condensed but is removed as vapour with the flue gases. Under these conditions, the operative heat of combustion is the net calorific value of the fuel at constant pressure. The net calorific value at constant volume can also be used; equations are given for calculating both values.

General principles and procedures for the calibrations and the fuel tests are presented in the main text, whereas those pertaining to the use of a particular type of calorimetric instrument are described in annexes. Checklists for performing calibration and fuel tests using specified types of calorimeters and examples illustrating some of the calculations are also given.

Replaced standards (1)

NF ISO 1928

May 2004

Standard Cancelled

Solid mineral fuels - Determination of gross caloric value by the bomb calorimetric method, and calculation of net calorific value

Table of contents

Avant-propos
v
1 Domaine d'application
1
2 Références normatives
1
3 Termes, définitions et symboles
2
3.1 Termes et définitions
2
3.2 Symboles
3
4 Principe
5
4.1 Pouvoir calorifique supérieur
5
4.2 Pouvoir calorifique inférieur
5
5 Réactifs
6
6 Appareillage
7
6.1 Généralités
7
6.2 Calorimètre avec enveloppe thermostatée
8
7 Préparation de l'échantillon pour essai
11
8 Mode opératoire calorimétrique
11
8.1 Généralités
11
8.2 Préparation de la bombe pour mesurage
13
8.3 Assemblage du calorimètre
14
8.4 Réaction de combustion et mesurages de la température
14
8.5 Analyse des produits de combustion
15
8.6 Augmentation de température corrigée
15
8.7 Température de référence
17
9 Étalonnage
17
9.1 Principe
17
9.2 Élément d'étalonnage
17
9.3 Plage de fonctionnement valide de la capacité calorifique effective
18
9.4 Apports auxiliaires
19
9.5 Mode opératoire d'étalonnage
19
9.6 Calcul de la capacité calorifique effective pour l'essai individuel
19
9.7 Fidélité de la valeur moyenne de la capacité calorifique effective, s
21
9.8 Redétermination de la capacité calorifique effective
21
10 Pouvoir calorifique supérieur
22
10.1 Généralités
22
10.2 Combustions du charbon
22
10.3 Combustions du coke
22
10.4 Calcul du pouvoir calorifique supérieur
23
10.5 Expression des résultats
25
10.6 Calcul par rapport à d'autres bases
25
11 Fidélité
26
11.1 Limite de répétabilité
26
11.2 Limite de reproductibilité
26
12 Calcul du pouvoir calorifique inférieur
26
12.1 Généralités
26
12.2 Calculs
26
13 Rapport d'essai
29
Annexe A (normative) Bombes calorimétriques adiabatiques
30
Annexe B (normative) Bombes calorimétriques isopériboliques et à enceinte statique
34
Annexe C (normative) Bombes calorimétriques automatisées
39
Annexe D (informative) Listes des contrôles pour la conception et les modes opératoires des essais de combustion
42
Annexe E (informative) Exemples pour illustrer certains calculs utilisés dans la présente Norme internationale
48
Annexe F (informative) Utilisation, maintenance et vérification des bombes calorimétriques
53
Bibliographie
59
Index alphabétique
60

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