a single effect evaporator is used to concentrate a solution of 10% of total solids to...

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Mechanical Engineering

a single effect evaporator is used to concentrate asolution of 10% of total solids to 30% of total solids at a rate of250 kg / h. if the evaporator pressure is 77 kpa, and if steam isavailable at 200 kpa gauge, the amount of steam needed per hour andthe area of â€‹â€‹heat transfer area if the overall heat transfercoefficient is 1700 jm -22s-1 Â° C. the feed temperature is 18 Â° Cand the boiling point of the solution below 77 kpa is 91 Â° C. thespecific heat of the solution is the same as water, which is 4,186x 103 jkg-1, and the latent heat of the evaporation of the solutionis the same as the water under the same conditions
a. the amount of steam needed (kg/hour)
b. amount of heat moved area (mÂ²)

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3.8 Ratings (431 Votes)

From steam tables the condensing temperature of steam at 200 kPa gauge300 kPa absolute is 134C and latent heat 2164 kJ kg1 the condensing temperature at 77 kPa abs is 91C and latent heat is 2281 kJ kg1 Mass See Answer

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