粮食干燥体系熵平衡方程及火用特征研究
首发时间:2010-03-08
摘要:本研究建立粮食深床干燥质平衡方程,能量平衡方程,利用非平衡热力学的熵产和熵流理论,建立粮食干燥体系熵平衡方程,导出熵产生率密度表达式,说明粮食干燥体系的火用特征。为评价粮食干燥系统能量结构及合理地利用提供提供理论分析和评价方法。
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Study on exergy characteristics of grain drying system and its transfering and conversion laws
Abstract:Based on in-depth analysis of the thermodynamics for grain drying system, the mass balance equation, energy balance equation are established.Based on the entropy production and entropy flux theories of the non-equilibrium thermodynamics, grain drying system entropy balance equation is established and the expression of entropy production rate density is deduced.Based on the exergy characteristics of grain drying system,the exergy balance equations are established,the exergy flux density expression of drying air and grain are deduced.On the basis of this ,the transfer and conversion laws of exergy of drying air and grain are analysed and discussed in the condition of hot air drying and natural air drying.
Keywords: Grain Drying Exergy Exergy Characteristics
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No.4048451752912680****
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