BS 845-1:1987

Foreword
Committees responsible
Method
1. Scope
2. Definitions
3. General
4. Instrumentation
5. Procedure
6. Calculations
7. Report
Appendices
A. Report data
B. The accuracy of boiler tests
C. Radiation, convection and conduction losses for
     boilers of conventional design
Tables
1. Typical instruments and their accuracies
2. Symbols and units
3. Typical radiation, convection and conduction
     losses from water-tube and shell boilers
4. Typical radiation, convection and conduction
     losses from sectional hot water boilers
Figure
1. Outline of the procedure for calculating from
     the test measurements

A concise but complete test method, at minimum cost, for assessing the thermal performance of boilers, generally of output greater than 44 kW which are thermodynamically simple and fired by solid, liquid or gaseous fuels.

This Part of BS 845 describes a concise procedure for conducting thermal performance assessments, using the indirect (losses) procedure, to give results within a tolerance of ± 2 percentage points¹⁾ for boilers for steam, hot water or high temperature heat transfer fluids and for presenting the results in tabular form. Test results are based on either the gross or the net calorific value of the fuel.

This concise procedure provides a convenient means for assessing boilers which are thermodynamically simple, i.e. having a single major source of heat input and a simple circuit for water, steam or high temperature heat transfer fluid, and that do not condense moisture out of the flue gases.

NOTE The titles of the publications referred to in this standard are listed on the inside back cover.