Textile Engineering > GATE 2019 > Textile Drying
A wet polyester fabric has an areal density of 160 g/m². The initial temperature of the wet fabric is 20°C. After it is completely dried on a cylinder dryer, its areal density drops to 100 g/m². Consider the specific heat of polyester as 2.0 J/g°C, the specific heat of water as 4.2 J/g°C, and the latent heat of evaporation of water as 2260 kJ/kg. Assuming that there is no heat loss, what is the energy (in kJ) required to dry 1 m² of the fabric (rounded off to two decimal places)?
Correct : 170.00 to 173.00
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