Assume you need to remove 10000 lbs of water from grain If y

Assume you need to remove 10,000 lbs of water from grain. If you blow 5000 cfm of air at 100 F and 10% RH over the grain and the air exits at 90% RH, how long will it take to remove all the water? All the answers I have been getting from Chegg read wrong when I type them into the answer slot.

Solution

The step to find out the time would be as follows - First we have to find the drying force at the surface as DVa = Pw-Pws then similarly the drying force at the exit DVb= Pw-Pws . By subtracking DVb from DVa . The moisture transport capacity is ascertained as we know the air flow per minute and the quantum of water to be removed . We can find the time by dividing volume /rate . As we have the moisture transportinget capacity is known . we can find the exact time.