I'm not a chemical engineer, but I'll give it a shot:
There are three degrees of freedom: mass of strawberries, mass of sugar, quantity of water evaporated. (Assuming that the 45:55 ratio and 1/3% water aren't constraints.) Nothing else in the procedure can be changed, right?
Flow: strawberries (85% solid, 15% water) + sugar into the vat, evaporated water + jam out of the vat.
Again, I'm no ChemE--(I'm an Env. Engineer) so I'd double check with someone else with my analysis.
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