14.4. A triple-effect sugar evaporator is to be designed to concentrate 100,000lb/hr of solution at 150F from 14 to 50Brix. Steam is available at 150psig, and water at 75F. Steam to the first effect will be 25 psig, and the vacuum in the last effect will be held at 24 in. Hg. Vapors will leave the first effect at 15 psig and will partly be compressed by a thermocompressor using 150 psig steam and partly enter the second effect as steam. Assuming equal surfaces for the three bodies, forward-feed arrangement, and a 5F approach in the condenser, estimate (a) the total steam required to the first effect, (b) the total 150 psig steam used, (c) economy, (d) water required in the condenser, (e) surface required, assuming UD=500,300, and 150 for the three effects, respectively