GATE (TF) Textile 2019 Question Paper Solution | GATE/2019/TF/55

Question 55 (Textile Technology & Fibre Science)

A wet polyester fabric has areal density of 160g/m2. The initial temperature of the wet fabric is 20oC. After it is completely dried on a cylinder dryer, its areal density drops to 100 g/m2.

* Specific heat of polyester as 2.0 J/goC
* Specific heat of water as 4.2 J/goC
* Latent heat of evaporation of water as 2260 kJ/kg

Assuming that there is no heat loss, the energy (kJ) required to dry 1 m2 of the fabric (rounded off to 2 decimal places) is ______________.

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