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 $84\mathrm{.}55$ 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 $($also at $84\mathrm{.}55$ kPa$)$ due to venting of air

and direct losses to the atmosphere. The specific heat of the feed is $4$ kJ$/$kgoC and of concentrated

product is $3\mathrm{.}2$ kJ$/$kgoC$.$ Calculate the steam economy for the process to two decimal places.

h $=$ h$2+[($h$1$ h$2)($T$2$ T$)($T$2$ T$1)]$