Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Chapter 2, Problem 17P
To determine
How the given condition of power consumption affect the per person in the family of two.
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Given a portion of a pipe network below. Determine the true discharge in each pipe using the
Hardy-Cross method. Use the Darcy-Weisbach formula with f = 0.02 for all pipes.
Pipe
AB
Length (m)
Diameter (cm)
600
25
BC
400
25
CD
900
30
DA
AC
1000
20
1500
20
Q₁₁ = 0.20 m³/s
B
Qc = 0.30 m³/s
Loop I
QA 0.10 m³/s A.
C
Loop II
Q₁ = 0.20 m³/s
The figures below shows the framing plan and section of a reinforced concrete floor system.
Floor beams are shown as dotted lines. The weight of the ceiling and floor finishing is 6 psf,
that of the mechanical and electrical systems is 7 psf, and the weight of the partitions is 180
psf. The floor live load is 105 psf. The 7 in. thick slab exterior bay (S-1) is reinforced with #5
rebars @ 10 in. o.c. as the main positive reinforcement at the mid span, and #4 @ 109 in. for
the shrinkage and temperature reinforcement. The panel is simply supported on the exterior
edge and monolithic with the beam at the interior edge. Check the adequacy of the slab. Use
the ACI moment coefficients. fc’ = 6,000 psi and fy = 60,000 psi. The slab is in an interior
location.
Hint:
• Estimate total dead load. Find factored maximum positive bending moment in the end
span.
• Find design positive moment capacity.
• Compare and determine adequacy, including safety and economy.
Question 6
Two reservoirs have a 6 m difference in water levels and are connected by a pipe 60 cm in
diameter and 3000 m long. Then, the pipe branches into two pipes, each 30 cm in diameter and
1500 m long. The friction coefficient is 0.01. Neglecting minor losses, determine the flow rates
in the pipe system.
Q
Q3
ha
h₁ = 6 m
Chapter 2 Solutions
Sustainable Energy
Ch. 2 - A quantity has a doubling time of 110 years....Ch. 2 - The population of a particular country has a...Ch. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - The total world population in 2012 was about 7...Ch. 2 - The population of a state is 25,600 in the year...Ch. 2 - The population of a country as a function of time...Ch. 2 - Prob. 9PCh. 2 - Prob. 10PCh. 2 - Prob. 11P
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