BS ISO 11520-2:2001

Foreword
Introduction
1 Scope
2 Normative reference
3 Terms and definitions
4 Symbols and abbreviated terms
5 Test procedure
   5.1 General
   5.2 Test period
   5.3 Frequency of sampling grain
   5.4 Moisture removal
   5.5 Grain dampening
   5.6 Procedure for a multi-pass test
6 Grain quality
   6.1 General
   6.2 Input grain
   6.3 Output grain
7 Methods of correction of test results
   7.1 General
   7.2 Evaporation rate
   7.3 Mass flow rate of grain
   7.4 Corrected drying time
   7.5 Specific thermal energy, total energy and
       fuel consumption
8 Test report
Annex A (informative) Grain moisture content
        and sampling
Annex B (informative) Moisture removal in specific
        crops
Annex C (normative) Testing reduction in grain
        germination
Annex D (normative) Tables for correction of drier
        performance
Annex E (informative) Airflow calculations
Bibliography

Specifies additional procedures and gives guidance for testing and evaluating the drying performance of continous-flow and batch grain crops including wheat, barley, oats, maize, rice, sorghrum and rape. Methods and data are given for correcting the main drier performance characteristics, including evaporation rate of driers when drying, grain flow rate, drying time and specific energy and fuel consumption, to reference and other ambient conditions.

This part of ISO11520 specifies additional procedures and gives guidance for testing and evaluating the drying performance of continuous-flow and batch grain driers for specific grain crops including wheat, barley, oats, maize, rice, sorghum and rape. It supplements the general procedures given in ISO11520-1 based on drying only wheat over the limited range of moisture content of 20%to 15%wet basis. Methods and data are given for determining the evaporation rate of driers when drying grain crops under steady state conditions, and correcting the main drier performance characteristics, including evaporation rate, grain flow rate, drying time and specific energy and fuel consumption, to reference and other ambient conditions. Procedures are specified for sampling input and output grain to assess changes in grain quality.