Abstract
A simple simulation model is presented to describe temperature changes observed during summer and autumn in three grain bulks in horizontal storages in the sub-tropical region of Australia. The model includes empirical descriptions of temperatures of upper and lower surfaces and finite difference equations describing heat transfer by conduction. Although the model is simplistic it should prove useful as a predictive tool for entomological purposes. Predicted temperatures closely followed observed temperatures. Grain temperatures 2 m from the surface changed little during summer and autumn, and remained favourable for insect development at the start of winter. In one storage, heating associated with a heavy insect infestation raised temperatures to over 40°C.
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