449 太陽熱を利用した家畜糞尿のメタン発酵装置の熱解析 : 発酵バックの温度分布

概要

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In previous report, thermal analysis of a low cost methane fermentation apparatus for diary manure slurry using solar energy was done under wherever temperature of slurry in fermentation bag would be same. In this report, heat transfer of slurry in fermentation bag should be only heat conduction from upper layer to under layer, temperature of fermentation bag was calculated. Consequently, it is clear that there are temperature differences in the fermentation bag between surface layer and bottom layer 2∿8.3℃ and hourly change of the temperature distribution of the fermentation bag show so slowly as for long term. The temperature of its upper half depth of the type A fermentation bag was kept over 106 days above 30℃, on the other hand, the temperature of the upper half of depth of type B was kept over 142 days above 30℃.
2003-06-24