Engineering Mechanics: Statics & Dynamics (14th Edition)
14th Edition
ISBN: 9780133915426
Author: Russell C. Hibbeler
Publisher: PEARSON
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Textbook Question
Chapter 9.1, Problem 27P
Locate the centroid ȳ of the shaded area.
Probs. 9-26/27
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Required information
A one-shell-pass and eight-tube-passes heat exchanger is used to heat glycerin (cp=0.60 Btu/lbm.°F) from 80°F to 140°F
by hot water (Cp = 1.0 Btu/lbm-°F) that enters the thin-walled 0.5-in-diameter tubes at 175°F and leaves at 120°F. The total
length of the tubes in the heat exchanger is 400 ft. The convection heat transfer coefficient is 4 Btu/h-ft²°F on the glycerin
(shell) side and 70 Btu/h-ft²°F on the water (tube) side.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.
Determine the rate of heat transfer in the heat exchanger before any fouling occurs.
Correction factor F
1.0
10
0.9
0.8
R=4.0 3.0 2.0.15 1.0 0.8.0.6 0.4 0.2
0.7
0.6
R=
T1-T2
12-11
0.5
12-11
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
(a) One-shell pass and 2, 4, 6, etc. (any multiple of 2), tube passes
P=
T₁-11
The rate of heat transfer in the heat exchanger is
Btu/h.
!
Required information
Air at 25°C (cp=1006 J/kg.K) is to be heated to 58°C by hot oil at 80°C (cp = 2150 J/kg.K) in a cross-flow heat exchanger
with air mixed and oil unmixed. The product of heat transfer surface area and the overall heat transfer coefficient is 750
W/K and the mass flow rate of air is twice that of oil.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.
Air
Oil
80°C
Determine the effectiveness of the heat exchanger.
In an industrial facility, a counter-flow double-pipe heat exchanger uses superheated steam at a temperature of 155°C to
heat feed water at 30°C. The superheated steam experiences a temperature drop of 70°C as it exits the heat exchanger.
The water to be heated flows through the heat exchanger tube of negligible thickness at a constant rate of 3.47 kg/s. The
convective heat transfer coefficient on the superheated steam and water side is 850 W/m²K and 1250 W/m²K,
respectively. To account for the fouling due to chemical impurities that might be present in the feed water, assume
a fouling factor of 0.00015 m²-K/W for the water side.
The specific heat of water is determined at an average temperature of (30 +70)°C/2 = 50°C and is taken to be
J/kg.K.
Cp=
4181
Water
Steam
What would be the required heat exchanger area in case of parallel-flow arrangement?
The required heat exchanger area in case of parallel-flow arrangement is
1m².
Chapter 9 Solutions
Engineering Mechanics: Statics & Dynamics (14th Edition)
Ch. 9.1 - In each case, use the element shown and specify...Ch. 9.1 - Determine the centroid (x,y) of the shaded area....Ch. 9.1 - Determine the centroid (x,y) of the shaded area....Ch. 9.1 - Determine the centroid of the shaded area. Prob....Ch. 9.1 - Locate the center of mass x of the straight rod if...Ch. 9.1 - Locate the centroid of the homogeneous solid...Ch. 9.1 - Locate the centroid z of the homogeneous solid...Ch. 9.1 - Locate the center of mass of the homogeneous rod...Ch. 9.1 - Prob. 2PCh. 9.1 - Locate the center of gravity x of the homogeneous...
Ch. 9.1 - Locate the center of gravity of the homogeneous...Ch. 9.1 - Prob. 5PCh. 9.1 - Locate the centroid of the area.Ch. 9.1 - Locate the centroid x of the parabolic area. Prob....Ch. 9.1 - Prob. 8PCh. 9.1 - Locate the centroid x of the shaded area. Probs....Ch. 9.1 - Locate the centroid of the shaded area. Probs....Ch. 9.1 - Locate the centroid x of the area. Probs. 9-11/12Ch. 9.1 - Locate the centroid of the area. Probs. 9-11/12Ch. 9.1 - Locate the centroid x of the area. Probs. 9-13/14Ch. 9.1 - Locate the centroid of the area. Probs. 9-13/14Ch. 9.1 - Prob. 15PCh. 9.1 - Prob. 16PCh. 9.1 - Prob. 17PCh. 9.1 - Prob. 18PCh. 9.1 - Prob. 19PCh. 9.1 - Prob. 20PCh. 9.1 - Locate the centroid x of the shaded area. Probs....Ch. 9.1 - Locate the centroid of the shaded area. Probs....Ch. 9.1 - Prob. 23PCh. 9.1 - Locate the centroid of the shaded area. Probs....Ch. 9.1 - Prob. 25PCh. 9.1 - Locate the centroid x of the shaded area. Probs....Ch. 9.1 - Locate the centroid of the shaded area. Probs....Ch. 9.1 - Prob. 28PCh. 9.1 - Prob. 29PCh. 9.1 - Locate the centroid x of the shaded area. Probs....Ch. 9.1 - Prob. 31PCh. 9.1 - Prob. 32PCh. 9.1 - Prob. 33PCh. 9.1 - The steel plate is 0.3 m thick and has a density...Ch. 9.1 - Prob. 35PCh. 9.1 - Prob. 36PCh. 9.1 - Prob. 37PCh. 9.1 - Determine the location r of the centroid C for the...Ch. 9.1 - Locate the center of gravity of the volume. The...Ch. 9.1 - Prob. 40PCh. 9.1 - Locate the centroid z of the frustum of the...Ch. 9.1 - Prob. 42PCh. 9.1 - Locate the centroid of the quarter-cone. Prob....Ch. 9.1 - Prob. 44PCh. 9.1 - Locate the centroid z of the volume. Prob. 9-45Ch. 9.1 - Prob. 46PCh. 9.1 - Prob. 47PCh. 9.1 - Prob. 48PCh. 9.1 - Prob. 49PCh. 9.1 - Prob. 50PCh. 9.2 - Locate the centroid (x,y,z) of the wire bent in...Ch. 9.2 - Prob. 8FPCh. 9.2 - Prob. 9FPCh. 9.2 - Prob. 10FPCh. 9.2 - Prob. 11FPCh. 9.2 - Prob. 12FPCh. 9.2 - Prob. 51PCh. 9.2 - Prob. 52PCh. 9.2 - Prob. 53PCh. 9.2 - Prob. 54PCh. 9.2 - Locate the centroid (x,y) of the metal cross...Ch. 9.2 - Prob. 56PCh. 9.2 - Prob. 57PCh. 9.2 - Determine the location of the centroidal axis xx...Ch. 9.2 - Locate the centroid (x,y) of the shaded area....Ch. 9.2 - Prob. 60PCh. 9.2 - Determine the location of the centroid C of the...Ch. 9.2 - Locate the centroid (x,y) of the shaded area....Ch. 9.2 - Determine the location of the centroid of the...Ch. 9.2 - Locate the centroid (x,y) of the shaded area....Ch. 9.2 - Determine the location (x,y) of the centroid C of...Ch. 9.2 - Determine the location of the centroid C for a...Ch. 9.2 - Locate the centroid of the cross-sectional area...Ch. 9.2 - A triangular plate made of homogeneous material...Ch. 9.2 - A triangular plate made of homogeneous material...Ch. 9.2 - Prob. 70PCh. 9.2 - Prob. 71PCh. 9.2 - Prob. 72PCh. 9.2 - Prob. 73PCh. 9.2 - Prob. 74PCh. 9.2 - Locate the center of mass (x,y,z) of the...Ch. 9.2 - The sheet metal part has the dimensions shown....Ch. 9.2 - Prob. 77PCh. 9.2 - The wooden table is made from a square board...Ch. 9.2 - Prob. 79PCh. 9.2 - Prob. 80PCh. 9.2 - Prob. 81PCh. 9.2 - Prob. 82PCh. 9.2 - Prob. 83PCh. 9.2 - Prob. 84PCh. 9.2 - Determine the distance z to the centroid of the...Ch. 9.2 - Prob. 86PCh. 9.2 - Prob. 87PCh. 9.2 - Prob. 88PCh. 9.2 - Prob. 89PCh. 9.3 - Prob. 13FPCh. 9.3 - Prob. 14FPCh. 9.3 - Prob. 15FPCh. 9.3 - Prob. 16FPCh. 9.3 - Prob. 90PCh. 9.3 - Prob. 91PCh. 9.3 - Prob. 92PCh. 9.3 - Prob. 93PCh. 9.3 - Prob. 94PCh. 9.3 - Prob. 95PCh. 9.3 - Prob. 96PCh. 9.3 - Determine the volume of concrete needed to...Ch. 9.3 - Determine the surface area of the curb. Do not...Ch. 9.3 - Prob. 99PCh. 9.3 - Prob. 100PCh. 9.3 - Prob. 101PCh. 9.3 - Prob. 102PCh. 9.3 - Prob. 103PCh. 9.3 - Prob. 104PCh. 9.3 - Prob. 105PCh. 9.3 - Prob. 106PCh. 9.3 - Prob. 107PCh. 9.3 - Prob. 108PCh. 9.3 - Prob. 109PCh. 9.3 - Prob. 110PCh. 9.3 - Prob. 111PCh. 9.3 - Prob. 112PCh. 9.3 - Prob. 113PCh. 9.3 - Prob. 114PCh. 9.5 - Determine the magnitude of the hydrostatic force...Ch. 9.5 - Determine the magnitude of the hydrostatic force...Ch. 9.5 - Prob. 19FPCh. 9.5 - Prob. 20FPCh. 9.5 - Prob. 21FPCh. 9.5 - The pressure loading on the plate varies uniformly...Ch. 9.5 - The load over the plate varies linearly along the...Ch. 9.5 - Prob. 117PCh. 9.5 - Prob. 118PCh. 9.5 - Prob. 119PCh. 9.5 - When the tide water A subsides, the tide gate...Ch. 9.5 - The tank is filled with water to a depth of d = 4...Ch. 9.5 - Prob. 122PCh. 9.5 - The factor of safety for tipping of the concrete...Ch. 9.5 - Prob. 124PCh. 9.5 - The tank is used to store a liquid having a...Ch. 9.5 - Prob. 126PCh. 9.5 - Prob. 127PCh. 9.5 - Prob. 128PCh. 9.5 - Determine the magnitude of the resultant force...Ch. 9.5 - The semicircular drainage pipe is filled with...Ch. 9.5 - Prob. 1RPCh. 9.5 - Prob. 2RPCh. 9.5 - Prob. 3RPCh. 9.5 - Prob. 4RPCh. 9.5 - Prob. 5RPCh. 9.5 - Prob. 6RPCh. 9.5 - Prob. 7RPCh. 9.5 - Prob. 8RPCh. 9.5 - The gate AB is 8 m wide. Determine the horizontal...Ch. 9.5 - Prob. 10RP
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