In a textile mill, wet cloth passes through a hot air drier. The cloth enters with...

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In a textile mill, wet cloth passes through a hot air drier. The cloth enters with 90% moisture regain and leaves at 6% moisture regain at a speed of 1.15 m/s. The width of the cloth is 120 cm and its density on bone dry basis is 0.095 kg/m². The temperature of the cloth leaving the drier is 368 K (95° C). The ambient air enters the drier at 303 K (30 ° C) DB and 298K (25°C) WB while the hot air leaves the drier at 393K (120° C) DB and 328 K(55° C) WB. Calculate : (i) the bone dry production of the drier (ii) evaporation taking place in the drier and (iii) air circulation rate. (12) (Oct '98) In a textile mill, wet cloth passes through a hot air drier. The cloth enters with 90% moisture regain and leaves at 6% moisture regain at a speed of 1.15 m/s. The width of the cloth is 120 cm and its density on bone dry basis is 0.095 kg/m². The temperature of the cloth leaving the drier is 368 K (95° C). The ambient air enters the drier at 303 K (30 ° C) DB and 298K (25°C) WB while the hot air leaves the drier at 393K (120° C) DB and 328 K(55° C) WB. Calculate : (i) the bone dry production of the drier (ii) evaporation taking place in the drier and (iii) air circulation rate. (12) (Oct '98)

Answer rating: 100% (QA)

i To calculate the bone dry production of the drier you will need to determine the amount of moisture removed from the cloth and then multiply that by the width and speed of the cloth as it passes thr... View the full answer