A juice at 20 o C with 8% total solids is being concentrated to 35% total solids in a single-effect evaporator. Saturated steam is being supplied at 84.55 kPa, condensate is released at 95 o C and...

A juice at 20^oC with 8% total solids is being concentrated to 35% total solids in a single-effect evaporator. Saturated steam is being supplied at 84.55 kPa, condensate is released at 95^oC and evaporation takes place at 73^oC in the evaporator. The feed material enters the evaporator at a rate of 7000 kg/h. There are 15% total losses of steam due to venting of air and direct losses to the atmosphere. The specific heat of the feed is 4 kJ/kg^oC and of concentrated product is 3.2 kJ/kg^oC. Calculate the steam economy for the process to
two decimal places.