Warp Through the Box What is being sized

Total Ends

Sizing Speed m/min

Yarn Linear Density tex

Size & Drying Pickup, solids and where the water goes

Wet Pickup %

Size Liquor Solids %

Target Moisture after Drying %

Steam per Unit Water kg/kg

Drying Efficiency %

Size Add-On

— %

Dry size solids on the weight of the warp

Evaporation, Steam & Duty

Water Evaporated: — kg/h
Steam Demand: — kg/h
Drying Heat Duty: — kW
Dry Warp Entering: — kg/h
Sized Warp Leaving: — kg/h
Size Solids Consumed: — kg/h
Size Liquor Picked Up: — kg/h
Water per Kilogram of Warp: — kg/kg

The balance is per kilogram of dry warp entering the box and assumes the size liquor composition is constant, which drifts in practice as water evaporates from the box and as the warp removes solids preferentially. Wet pickup should be measured by weighing warp before and after the squeeze rolls rather than taken from a setting, since it moves with roll pressure, roll hardness, speed and yarn hairiness. The steam ratio is a lumped figure covering cylinder condensate, flash and radiation losses and varies widely between machines; the heat duty is the more transferable figure. Drying efficiency here covers everything between the steam and the water and should be established for the specific machine. Size recovery and reuse are not modelled.

Sizing Add-On, Water Evaporated & Cylinder Drying Load — free, with the formula and a worked example, at Textile School.