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1. Water is being pumped from the bottom of a well 15 ft deep at a rate of 200 gal/hr into a vented storage tank to maintain a level of water in a tank 165 ft above the ground. To prevent freezing in the water a small heater puts 40,000 Btu/hr into the water during its transfer from the well to the storage tank. Heat is loss from the whole system at the constant rate of 23,500 Btu/hr. What is the temperature of the water as it enters the storage tank, assuming that the well water is at 35°F? A 3-hp() pump is being used to pump the water. About 80% of the rated horsepower(hp) go into the work of pumping and the rest is dissipated as heat to the atmosphere. (If C, is assumed to be constant, C, of the water is 1 Btu/(lb)(°F) ) Given: 1-hp=550 ft-lbf/s , 1-Btu=778 ft-lbf 165 ft 15 ft 7=35° F System boundary

1. Water is being pumped from the bottom of a well 15 ft deep at a rate of 200 gal/hr into a vented storage tank to maintain a level of water in a tank 165 ft above the ground. To prevent freezing in the water a small heater puts 40,000 Btu/hr into the water during its transfer from the well to the storage tank. Heat is loss from the whole system at the constant rate of 23,500 Btu/hr. What is the temperature of the water as it enters the storage tank, assuming that the well water is at 35°F? A 3-hp() pump is being used to pump the water. About 80% of the rated horsepower(hp) go into the work of pumping and the rest is dissipated as heat to the atmosphere. (If C, is assumed to be constant, C, of the water is 1 Btu/(lb)(°F) ) Given: 1-hp=550 ft-lbf/s , 1-Btu=778 ft-lbf 165 ft 15 ft 7=35° F System boundary

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
Problem 1.1P
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1. Water is being pumped from the bottom of a well 15 ft deep at a rate of 200 gal/hr into a vented storage tank to maintain a level of water in a tank 165 ft above the ground. To prevent freezing in the water a small heater puts 40,000 Btu/hr into the water during its transfer from the well to the storage tank. Heat is loss from the whole system at the constant rate of 23,500 Btu/hr. What is the temperature of the water as it enters the storage tank, assuming that the well water is at 35°F? A 3-hp() pump is being used to pump the water. About 80% of the rated horsepower(hp) go into the work of pumping and the rest is dissipated as heat to the atmosphere. (If C, is assumed to be constant, C, of the water is 1 Btu/(lb)(°F) ) Given: 1-hp=550 ft-lbfs, 1-Btu=778 ft-lbf 165 ft 15 ft T = 35° F System boundary
Transcribed Image Text:1. Water is being pumped from the bottom of a well 15 ft deep at a rate of 200 gal/hr into a vented storage tank to maintain a level of water in a tank 165 ft above the ground. To prevent freezing in the water a small heater puts 40,000 Btu/hr into the water during its transfer from the well to the storage tank. Heat is loss from the whole system at the constant rate of 23,500 Btu/hr. What is the temperature of the water as it enters the storage tank, assuming that the well water is at 35°F? A 3-hp() pump is being used to pump the water. About 80% of the rated horsepower(hp) go into the work of pumping and the rest is dissipated as heat to the atmosphere. (If C, is assumed to be constant, C, of the water is 1 Btu/(lb)(°F) ) Given: 1-hp=550 ft-lbfs, 1-Btu=778 ft-lbf 165 ft 15 ft T = 35° F System boundary
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