NBN EN 12953-11 : 2003

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
  4.1 Symbols and units
  4.2 Coefficients
5 General
6 Basic test conditions
  6.1 General conditions
  6.2 Steady-state conditions
  6.3 Test procedure
  6.4 Requirements during test
  6.5 Duration of tests
  6.6 Procedure for the determination of exhaust gas temperature and
      CO, CO[2] and O[2] content
  6.7 Undetermined losses
7 Instrumentation and methods of measurements
  7.1 Instruments
  7.2 Pressure measurements
  7.3 Temperature measurements
  7.4 Mass and mass flow
  7.5 Calorific values
  7.6 Chemical composition
8 Heat balance and thermal efficiency
  8.1 General
  8.2 Envelope boundary
  8.3 Reference temperature
  8.4 Heat input
  8.5 Losses
  8.6 Determination of efficiency by indirect method
  8.7 Useful heat output
9 Accuracy
Annex A (informative) Calculation of combustion air/flue gas mass to
        fuel mass ratios and specific heat
        A.1 Combustion air/flue gas mass to fuel mass ratios
        A.2 Ultimate analysis
        A.3 Statistical analysis
        A.4 Specific heat of flue gas and combustion air
Annex B (normative) Waste heat boilers
        B.1 General
        B.2 Useful heat output
        B.3 Heat from waste gases
        B.4 Heat input
        B.5 Thermal efficiency
        B.6 Methods of measurement
Bibliography

Describes a concise procedure for conducting thermal performance tests, using the indirect (losses) procedure for boilers for steam or hot water.