Predicting the gas-tightness of grain storage structures

Authors: D.D. Mann, D.S. Jayas, W.E. Muir and N.D.G. White
Description: Fumigation with carbon dioxide (C02) can be a viable alternative to synthetic chemical control of stored-product insects, but storage structures must be well-sealed for the method to be efficient. Because the degree of gas-tightness is not consistent for all sealed bins, it would be beneficial if the gas-tightness could be determined before the start ofaCO2 fumigation. The hypotheses tested were that leakage area could be calculated from a measurement of pressure decay time and that gas loss during a fumigation could be predicted from the calculated leakage area. Wheat-filled pilot bins with holes of known areas were used to validate the relationship between pressure decay time and leakage area. The mathematical model predicted leakage areas in the pilot bins with errors ranging from -17.5 to 23.1 %. Predicted gas losses from pilot bins filled with polyethylene pellets were inconsistent with the observed gas losses. Gas loss decreased as the initial CO2 concentration decreased.
Citation: D.D. Mann, D.S. Jayas, W.E. Muir and N.D.G. White 1999. PREDICTING THE GAS-TIGHTNESS OF GRAIN STORAGE STRUCTURES. Canadian Agricultural Engineering 41(4):259-265.
Volume: 41
Issue: 4
Publisher: Canadian Society for Bioengineering
Date: 1999
Type: Text.Article
Format: PDF
Coverage: Canada
Language 1: en
Rights: Canadian Society for Bioengineering
Located in: Volume 41 (1999)