2.1 If the tank must be able to hold all of the water from a storm that delivers 1" of rain, what diameter must the tank be? 2.2 What is the flow rate of rain into the tank during a storm if the 1" of rain is delivered steadily over 6 hours? 2.3 If the storage tank is initially empty, and the hose is open (draining), use a spreadsheet approach to determine and graph the tank water level as a function of time for the above 6 hour storm until it is almost empty following the rainstorm. Assume a constant friction factor of 0.036 and neglect minor losses. Outline your approach/equations on paper so that another student could follow. At what time following the beginning of the rainstorm is the water depth down to 5"?

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 2
You are designing a giant cylindrical rain barrel / storage tank for your house that collects water
that drains off the roof. A hose drains the storage tank to the garden.
Projected horizontal area:
2,000 ft?
5 ft
Garden Hose
50ft of 3/4" diameter, f = 0.036
Water, 70F
2 ft
Free jet
2.1 If the tank must be able to hold all of the water from a storm that delivers 1" of rain, what diameter must
the tank be?
2.2 What is the flow rate of rain into the tank during a storm if the 1" of rain is delivered steadily over 6 hours?
2.3 If the storage tank is initially empty, and the hose is open (draining), use a spreadsheet approach to
determine and graph the tank water level as a function of time for the above 6 hour storm until it is almost
empty following the rainstorm. Assume a constant friction factor of 0.036 and neglect minor losses.
Outline your approach/equations on paper so that another student could follow. At what time following the
beginning of the rainstorm is the water depth down to 5"?
2.4 On your graph, delineate regions of filling, draining, and steady-state (if ever reached). Is the full height of
the tank needed for this storm?
2.5 If you wanted the tank to drain more slowly, list 3 changes that you could make.
2.6 If the 1" of rain occurred over 1 hour instead of over 6 hours, how would your water level graph change?
answer for 2.1) 6.5ft
2.2) 0.0077 cfs
2.3)6.17hr
Transcribed Image Text:Problem 2 You are designing a giant cylindrical rain barrel / storage tank for your house that collects water that drains off the roof. A hose drains the storage tank to the garden. Projected horizontal area: 2,000 ft? 5 ft Garden Hose 50ft of 3/4" diameter, f = 0.036 Water, 70F 2 ft Free jet 2.1 If the tank must be able to hold all of the water from a storm that delivers 1" of rain, what diameter must the tank be? 2.2 What is the flow rate of rain into the tank during a storm if the 1" of rain is delivered steadily over 6 hours? 2.3 If the storage tank is initially empty, and the hose is open (draining), use a spreadsheet approach to determine and graph the tank water level as a function of time for the above 6 hour storm until it is almost empty following the rainstorm. Assume a constant friction factor of 0.036 and neglect minor losses. Outline your approach/equations on paper so that another student could follow. At what time following the beginning of the rainstorm is the water depth down to 5"? 2.4 On your graph, delineate regions of filling, draining, and steady-state (if ever reached). Is the full height of the tank needed for this storm? 2.5 If you wanted the tank to drain more slowly, list 3 changes that you could make. 2.6 If the 1" of rain occurred over 1 hour instead of over 6 hours, how would your water level graph change? answer for 2.1) 6.5ft 2.2) 0.0077 cfs 2.3)6.17hr
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