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BS 3986-1:1998

Current
Current

The latest, up-to-date edition.

Methods of test for drying performance of agricultural grain dryers General procedures and limited requirements for wheat
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

10-31-1991

Publisher

British Standards Institution

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.

Committee
AGE/32
DevelopmentNote
Renumbers and supersedes BS 3986(1991) (07/2004) Supersedes 89/76536 DC and BS 3986(1966) 1998 Version incorporates amendment 9836 to BS 3986(1991) (07/2005) Reviewed and confirmed by BSI, February 2011. (01/2011)
DocumentType
Standard
Pages
34
PublisherName
British Standards Institution
Status
Current
Supersedes

ISO 7971:1986 Cereals Determination of bulk density, called "mass per hectolitre" (Reference method)
BS 7420:1991 Guide for determination of calorific values of solid, liquid and gaseous fuels (including definitions)
BS 1042-1.1(1981) : 1981 MEASUREMENT OF FLUID FLOW IN CLOSED CONDUITS - SPECIFICATION FOR SQUARE-EDGED ORIFICE PLATES, NOZZLES AND VENTURI TUBES INSERTED IN CIRCULAR CROSS SECTION CONDUITS RUNNING FULL
BS 1042-1.5(1987) : 1987 MEASUREMENTS OF FLUID FLOW IN CLOSED CONDUITS - GUIDE TO THE EFFECT OF DEPARTURE FROM THE STANDARD CONDITIONS SPECIFIED IN SECTION 1.1
BS 1042-2.3:1984 Measurement of fluid flow in closed conduits. Velocity area methods Methods of flow measurement in swirling or asymmetric flow conditions in circular ducts by means of current-meters or Pitot static tubes
BS 1042-2.2:1983 Measurement of fluid flow in closed conduits. Velocity area methods Method of measurement of velocity at one point of a conduit of circular cross section
BS 1042-2.1:1983 Measurement of fluid flow in closed conduits. Velocity area methods Method using Pitot static tubes
BS 2520:1983 Specification for barometer conventions and tables, their application and use
BS 4317-1:1980 Methods of test for cereals and pulses Determination of the mass of 1000 grains
BS 1042-1.4(1984) : 1984 MEASUREMENT OF FLUID FLOW IN CLOSED CONDUITS - GUIDE TO THE USE OF DEVICES SPECIFIED IN SECTIONS 1.1 AND 1.2

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