BS 3986-1:1998

Committees responsible
Foreword
Methods
1 Scope
2 Definitions
3 Principle
4 Symbols and units
5 Test equipment
6 Preparation for test
7 Test procedure
8 Calculation of results
9 Correction to standard conditions
10 Test report
Appendices
A Airflow calculations
B Estimation of uncertainty of derived measures of
    performance
C Quality criteria for grain
D Specimen report
Table
1 Effect of moisture removal, (Mi - Mf), on the uncertainty of
    the estimate of specific total energy consumption

Methods for evaluating continuous flow and batch grain dryers, correcting results to standard conditions and estimating the uncertainty of the predictions. Does not cover on-floor dryers. Covers specific procedures for rewetted wheat over a moisture content of 20% to 15% wet basis.

This Part of BS 3986 describes general procedures for evaluating the drying performance of continuous-flow and batch grain dryers and specific procedures for rewetted wheat over a moisture content range of 20 % to 15 % wet basis. The methods specified are for determining the evaporation rate which the machines concerned are able to achieve when drying wheat under the steady state conditions prevailing during the tests. Methods for correcting observed performance to other input and standard ambient conditions are described.

NOTE 1. BS 3986 : Part 2 specifies additional procedures and requirements for testing and evaluating dryer performance for other crops, including barley, oats, maize, rice, sorghum and rape, and for wheat over a wider range of conditions than those specified in Part 1.

NOTE 2. The titles of the publications referred to in this standard are listed on the inside back cover.