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Problem 1. A feed rate of 200 gpm of a hydrocarbon mixture at 70°C is being pumped from a tank at 1 atm abs pressure to a distillation tower. The density of the feed is 46.8 lbm/ft and its vapor pressure is 8.45 psia. The velocity in the inlet line to the pump is 3 ft/s and the friction loss in the suction line is 3.5 ft. The net positive suction head required is 6 ft. (a) Find the available net positive suction is at the same level as the surface of liquid in the reservoir. (b) What is the maximum head if the pump height of the pump relative to the level of the tank before cavitation becomes likely?

Problem 1. A feed rate of 200 gpm of a hydrocarbon mixture at 70°C is being pumped from a tank at 1 atm abs pressure to a distillation tower. The density of the feed is 46.8 lbm/ft and its vapor pressure is 8.45 psia. The velocity in the inlet line to the pump is 3 ft/s and the friction loss in the suction line is 3.5 ft. The net positive suction head required is 6 ft. (a) Find the available net positive suction is at the same level as the surface of liquid in the reservoir. (b) What is the maximum head if the pump height of the pump relative to the level of the tank before cavitation becomes likely?

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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**Problem 1.** A feed rate of 200 gpm of a hydrocarbon mixture at 70°C is being pumped from a tank at 1 atm abs pressure to a distillation tower. The density of the feed is 46.8 lbm/ft³ and its vapor pressure is 8.45 psia. The velocity in the inlet line to the pump is 3 ft/s and the friction loss in the suction line is 3.5 ft. The net positive suction head required is 6 ft. (a) Find the available net positive suction head if the pump is at the same level as the surface of liquid in the reservoir. (b) What is the maximum height of the pump relative to the level of the tank before cavitation becomes likely?
Transcribed Image Text:**Problem 1.** A feed rate of 200 gpm of a hydrocarbon mixture at 70°C is being pumped from a tank at 1 atm abs pressure to a distillation tower. The density of the feed is 46.8 lbm/ft³ and its vapor pressure is 8.45 psia. The velocity in the inlet line to the pump is 3 ft/s and the friction loss in the suction line is 3.5 ft. The net positive suction head required is 6 ft. (a) Find the available net positive suction head if the pump is at the same level as the surface of liquid in the reservoir. (b) What is the maximum height of the pump relative to the level of the tank before cavitation becomes likely?
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