Thermal properties of dairy cattle manure
 
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Department of Agro Technology Engineering, Aboreyhan Campus, University of Tehran, P.O.Box 11365-4117, Tehran, Iran
 
Int. Agrophys. 2009, 23(4): 359–366
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ABSTRACT
The thermal properties of dairy cattle manure were measured at the different temperature and moisture content. The specific heat and thermal conductivity of dairy cattle manure increased linearly from 1.9925 to 3.606 kJ kg-1 °C-1 and from 0.0901 to 0.6814 W m-1 °C-1, respectively. The moisture content was more effective than temperature in increasing the specific heat and thermal conductivity. The thermal diffusivity of dairy cattle manure varied from 1.13 to 2.94×10-7m2 s-1. The effect of temperature was greater than that of moisture content in increasing the thermal diffusivity. Comparison between measured and estimated values, developed by regression models, showed that the accuracy of the equations for thermal properties are suitable for engineers to design thermal equipments of dairy cattle manure.
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