HTU Height Equivalent to One Transfer Unit

HTU (Height Equivalent to One Transfer Unit) Frequently the values of the individual coefficients of mass transfer are so strongly dependent on flow rates that the quantity obtained by dividing each coefficient by the flow rate of the phase to which it applies is more nearly constant than the coefficient itself. The quantity obtained by this procedure is called the height equivalent to one transfer unit, since it expresses in terms of a single length dimension the height of apparatus required to accomplish a separation of standard difficulty. 

The equations that express the addition of individual resistances in terms of HTUs, applicable to either dilute or concentrated systems, 

These equations are strictly valid only when m, the slope of the equilibrium curve, is constant, as noted previously. 

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Height of transfer unit (HTU). The height of a transfer unit is best defined from Eq. (9.7) as the height of packing which gives a change composition equivalent to one transfer unit. It is therefore a diretf measure of column efficiency. 

HETS Height equivalent to one theoretical stage HTU Height of a transfer unit... 

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