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Lecture 4

Lecture 4. Other factors to consider. Heating & Cooling of the grain Same process as long as the temperature stays above the dewpt. An assumption is made that any change in temperature is assumed to occur with a change in moisture content. Other factors to consider. Wetting & Drying

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Lecture 4

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  1. Lecture 4

  2. Other factors to consider • Heating & Cooling of the grain • Same process as long as the temperature stays above the dewpt. An assumption is made that any change in temperature is assumed to occur with a change in moisture content

  3. Other factors to consider • Wetting & Drying • Occurs under essentially constant heat conditions • Water vapor is either added or removed without any change in the heat content of the air (Figure 2.6)

  4. Heating & Humidifying • Both the dry bulb temp & the humidity ratio Increase. • Similar to passing through a livestock shelter • Cooling & Dehumidifying • Both the dry bulb temp & the humidity ratio decrease • Similar to air that passes through an air conditioner

  5. Equilibrium Moisture Properties • Grain is hygroscopicequilibrium moisture content (EMC) contstant enviromental cond. • Equilibrium Relative Humidity (ERH) all changes are a function of temperature • See table 2.5

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