Subtopic: Concentration and drying of liquid foods – evaporators, tray, drum and spray dryers
Question Statement:
In a single-effect evaporator, juice boils at $60^\circ\text{C}$ (latent heat of vaporization $\lambda_v = 2358\text{ kJ/kg}$) producing $2000\text{ kg/h}$ of vapor. Saturated steam is supplied at $100^\circ\text{C}$ (latent heat of condensation $\lambda_s = 2257\text{ kJ/kg}$). If the overall heat transfer coefficient $U = 1800\text{ W/(m}^2\cdot\text{K)}$, the required heating surface area $A$ in $\text{m}^2$ is ________ (round off to 1 decimal place).