Fundamental Study of a Loop-Tube-Type Thermoacoustic Heating System

This paper proposes a loop-tube type thermoacoustic heating system without any moving parts based on the thermoacoustic effect. In a thermoacoustic heating system, the supplied sound is converted to heat and the heating point is heated. A thermoacoustic heating system differs from a thermoacoustic cooling system： The location of the reference temperature section at the heat pump is upside down. The authors construct a prototype ofthermoacoustic heating system. The experimental results show that the heating point reaches 100 ~C. It must be emphasized that, using this simple and inexpensive thermoacoustic heating system, noise, waste heat and unused heat are useful as a renewable energy source.

130L环隙气升式旋流反应器的局部相含率研究

为给渣油加氢反应器的工业放大提供参考,在130L环隙气升式旋流反应器中,以空气-水-717型阴离子交换树脂为三相物系,研究了表观气速、底部间隙、固体装载量、导流筒型式、乙醇体积分数对相含率的影响。结果表明,上升区局部气含率随表观气速、乙醇体积分数的增加而增加,随固体装载量的增加而降低,随底部间隙的增加先增加而后减小,底部间隙最优值为60 mm。当导流筒型式不同时,气含率由大到小依次为:翅片型、喇叭口型、传统圆柱型。在表观气速为0.239、0.478cm/s时,上升区局部固含率沿轴向高度呈现出"下浓上稀"的趋势;当表观气速为0.597、0.836cm/s时,上升区局部固含率轴向分布均匀。上升区局部固含率随底部间隙的增大而减小,随乙醇体积分数的增加而变化不大。