PREN 14918 : DRAFT 2009

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Preparation of test sample
8 Calorimetric procedure
9 Calibration
10 Gross calorific value
11 Precision
12 Calculation of net calorific value at constant pressure
13 Test report
Annex A (normative) - Adiabatic bomb calorimeters
  A.1 Principle
  A.2 Sources of error for the real calorimeter
  A.3 Adiabatic conditions
  A.4 Initial steady state and length of the main period
  A.5 Correction for drift at the final temperature
  A.6 Strategy for checking on bias
Annex B (normative) - Isoperibol and static-jacket bomb
        Calorimeters
  B.1 Principle
  B.2 Sources of error for the real calorimeter
  B.3 Choice of jacket temperature
  B.4 Rating periods
  B.5 Calculation of the corrected temperature rise theta
Annex C (normative) - Automated bomb calorimeters
  C.1 The instrument
  C.2 Calibration
  C.3 Precision requirements for calibrations
  C.4 Comparability of calibration and fuel experiments
  C.5 Documentation and print-out
  C.6 Precision requirements for fuel experiments
Annex D (informative) - Checklists for the design and
        procedures of combustion experiments
  D.1 Introduction
  D.2 Choice of general parameters
  D.3 Adiabatic calorimeters
  D.4 Isoperibol calorimeters
  D.5 Automated bomb calorimeters
Annex E (informative) - Examples to illustrate the main
        calculations used in this document when an
        automated bomb calorimeter is used for determinations
  E.1 Gross calorific value at constant volume
  E.2 Gross calorific value at constant pressure
  E.3 Net calorific value
  E.4 Use of typical or default values to calculate calorific
      values
Annex F (informative) - List of symbols used in this document
Annex G (informative) - Key-word index
Annex H (informative) - Default values of most used biofuels
        for the calculations of calorific values
Annex I (informative) - Flow chart for a routine calorific value
        determination
Bibliography

Defines a method for the determination of the gross calorific value of a solid biofuel at constant volume and at the reference temperature 25 degree C in a bomb calorimeter calibrated by combustion of certified benzoic acid.