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The specific heat of mash feed for growing-finishing pigs as affected by moisture content, temperature and grinding particle size
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org
Citation: 2018 ASABE Annual International Meeting 1800057.(doi:10.13031/aim.201800057)
Authors: Dandan Kong, Nan Jin, Tengfei Li, Peng Fang, Enze Duan, Jiyuan Chen, Menghu Zheng, Hongying Wang
Keywords: mash feed, growing-finishing pigs, specific heat, moisture content, temperature, grinding particle size.
Abstract. The specific heat of mash feeds for growing-finishing pigs was measured as a function of moisture content (10%-18%w.b.), temperature (25-100℃) and grinding particle size (394.47-429.99 μm) by differential scanning calorimetry (DSC). The specific heat was found to be significant dependent of the three variables studied, and the effect of moisture content was greater than both temperature and grinding particle size. The specific heat of mash feeds, passing through Φ2.0, Φ2.5, Φ3.0 mm screen, increased with increase in moisture content (10% - 18% wet basis) and temperature (25-100℃) from 1.541 to 2.743、1.575 to 2.859 and 1.542 to 2.839 kJ/(kg·K), respectively. Specific heat had a linear positive correlation with moisture content and a logarithmic correlation with temperature. Regression models with high R2 values were established to predict the specific heat of mash feeds as a function of moisture content, temperature individually, and both moisture content, temperature and grinding particle size.
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