Fundamentals of Thermal-Fluid Sciences
5th Edition
ISBN: 9780078027680
Author: Yunus A. Cengel Dr., Robert H. Turner, John M. Cimbala
Publisher: McGraw-Hill Education
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Chapter 11, Problem 28P
To determine
Explain whether the buoyancy forces acting on the two different spherical balls will be same or different.
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A start-up company wants to convert an ICE vehicle into an electric vehicle with the following specification.
Power: 250 (HP) horsepower, (note: 1HP = 745 W)
Range: 300-miles
Fuel economy: 33.5 kilometers per gallon of gasoline.
Efficiency of the ICE: 25%
Energy Conversion: One gallon of gasoline at 100% efficiency is equal to 33.5 kWh/gallon).
a)Calculate the EV consumption rate as Wh/km and find the total energy of the battery pack in KWh to replace the internal combustion engine.
b)Design an 8-module battery pack for this full electric vehicle without compromising its range and performance (power).
Use commercially available cylindrical cells lithium cell with 20Ah capacity and 3.125 V average voltage. Cell dimensions are 5cm diameter and 10 cm height. The electric motor requires 250 V input that will be provided directly from the battery pack, Report the configuration of each module in…
"11-17 The shaft shown in Figure P11-3 was designed in Problem 10-17. For the data in the
row(s) assigned from Table P11-1, and the corresponding diameter of shaft found in
Problem 10-17, design suitable bearings to support the load for at least 1E8 cycles at
1800 rpm. State all assumptions.
(a)
Using hydrodynamically lubricated bronze sleeve bearings with Ox = 15,
11d=0.75, and a clearance ratio of 0.001.
✓ ✓
cast-iron roller
FIGURE P11-3
Shaft Design for Problems 11-17
b
gear
key
assume bearings act
as simple supports
11-19 The shaft shown in Figure P11-4 was designed in Problem 10-19. For the data in the
row(s) assigned from Table P11-1, and the corresponding diameter of shaft found in
Problem 10-19, design suitable bearings to support the load for at least 5E8 cycles at
1200 rpm. State all assumptions.
(a)
Using hydrodynamically lubricated bronze sleeve bearings with Oy = 40,
1/d=0.80, and a clearance ratio of 0.002 5.
gear
gear
key
FIGURE P11-4
Shaft Design for Problems 11-19 and…
Chapter 11 Solutions
Fundamentals of Thermal-Fluid Sciences
Ch. 11 - Prob. 1PCh. 11 - Someone claims that she can determine the...Ch. 11 - A submerged horizontal flat plate is suspended in...Ch. 11 - You may have noticed that dams are much thicker at...Ch. 11 - Consider a submerged curved surface. Explain how...Ch. 11 - Consider a submerged curved surface. Explain how...Ch. 11 - Consider a circular surface subjected to...Ch. 11 - Consider a heavy car submerged in water in a lake...Ch. 11 - Prob. 9PCh. 11 - Consider a 8-m-long, 8-m-wide, and 2-m-high...
Ch. 11 - Consider a 200-ft-high, 1200-ft-wide dam filled to...Ch. 11 - A room in the lower level of a cruise ship has a...Ch. 11 - The water side of the wall of a 70-m-long dam is a...Ch. 11 - For a gate width of 2 m into the paper (Fig....Ch. 11 - Determine the resultant force acting on the...Ch. 11 - A 6-m-high, 5-m-wide rectangular plate blocks the...Ch. 11 - The flow of water from a reservoir is controlled...Ch. 11 - Repeat Prob. 11–18E for a water height of 8...Ch. 11 - A water trough of semicircular cross section of...Ch. 11 - A cylindrical tank is fully filled with water...Ch. 11 - An open settling tank shown in the figure contains...Ch. 11 - From Prob. 11-22, knowing that the density of the...Ch. 11 - Prob. 24PCh. 11 - The two sides of a V-shaped water trough are...Ch. 11 - What is buoyant force? What causes it? What is the...Ch. 11 - Consider two identical spherical balls submerged...Ch. 11 - Prob. 28PCh. 11 - Prob. 29PCh. 11 - Prob. 30PCh. 11 - Prob. 31PCh. 11 - Prob. 32PCh. 11 - The volume and the average density of an...Ch. 11 - Prob. 34PCh. 11 - Prob. 35PCh. 11 - Prob. 36PCh. 11 - Prob. 37PCh. 11 - A 170-kg granite rock ( = 2700 kg/m3) is dropped...Ch. 11 - It is said that Archimedes discovered his...Ch. 11 - Prob. 40PCh. 11 - An air-conditioning system requires a 34-m-long...Ch. 11 - Prob. 42RQCh. 11 - Prob. 43RQCh. 11 - Prob. 45RQCh. 11 - Prob. 46RQCh. 11 - A semicircular 40-ft-diameter tunnel is to be...Ch. 11 - Prob. 48RQCh. 11 - Prob. 49RQCh. 11 - The average density of icebergs is about 917...Ch. 11 - Prob. 51RQCh. 11 - Prob. 52RQCh. 11 - Prob. 53RQ
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- For the frame below calculate the bending moment at point R. Take P=40 and note that this value is used for both the loads and the lengths of the members of the frame. 2.5P- A Q B R С 45 degrees ✗ ✗ P i 19 Кур -2P- 4PRN -P- -arrow_forwardCalculate the bending moment at the point D on the beam below. Take F=79 and remember that this quantity is to be used to calculate both forces and lengths. 15F 30F A сarrow_forwardShow work on how to obtain P2 and T2. If using any table, please refer to it. If applying interpolation method, please show the work.arrow_forwardcast-iron roller FIGURE P11-3 Shaft Design for Problems 11-17 Chapter 11 BEARINGS AND LUBRICATION 677 gear key P assume bearings act as simple supports 11-18 Problem 7-18 determined the half-width of the contact patch for a 1.575-in-dia steel cylinder, 9.843 in long, rolled against a flat aluminum plate with 900 lb of force to be 0.0064 in. If the cylinder rolls at 800 rpm, determine its lubrication condition with ISO VG 1000 oil at 200°F. R₁ = 64 μin (cylinder); R₁ = 32 μin (plate). 11-19 The shaft shown in Figure P11-4 was designed in Problem 10-19. For the data in the row(s) assigned from Table P11-1, and the corresponding diameter of shaft found in Problem 10-19, design suitable bearings to support the load for at least 5E8 cycles at 1200 rpm. State all assumptions. (a) (b) Using hydrodynamically lubricated bronze sleeve bearings with ON = 40, 1/ d=0.80, and a clearance ratio of 0.002 5. Using deep-groove ball bearings for a 10% failure rate. *11-20 Problem 7-20 determined the…arrow_forwardCalculate the shear force at the point D on the beam below. Take F=19 and remember that this quantity is to be used to calculate both forces and lengths. 15F A сarrow_forward"II-1 The shaft shown in Figure P11-I was designed in Problem 10-1. For the data in the row(s) assigned from Table P11-1, and the corresponding diameter of shaft found in Problem 10-1, design suitable bearings to support the load for at least 7E7 cycles at 1500 rpm. State all assumptions. (a) Using hydrodynamically lubricated bronze sleeve bearings with Ox = 20, 1/d=1.25, and a clearance ratio of 0.001 5. assume bearings act as simple supports FIGURE P11-1 Shaft Design for Problem 11-1 11-2 The shaft shown in Figure P11-2 was designed in Problem 10-2. For the data in the row(s) assigned from Table P11-1, and the corresponding diameter of shaft found in Problem 10-2, design suitable bearings to support the load for at least 3E8 cycles at 2.500 rpm. State all assumptions. (a) Using hydrodynamically lubricated bronze sleeve bearings with ON=30, 1/d=1.0, and a clearance ratio of 0.002. FIGURE P11-2 Shaft Design for Problem 11-2 Table P11-1 Data for Problems assume bearings act as simple…arrow_forwardFor the frame below, calculate the shear force at point Q. Take P=13 and note that this value is used for both the loads and the lengths of the members of the frame. 1 A Q ✗ 19 KBP 2.5P- B R C 45 degrees ✗ 1 .2P- 4PhN -P→arrow_forwardCalculate the Bending Moment at point D in the frame below. Leave your answer in Nm (newton-metres) J J A 2m 2m <2m х D 不 1m X E 5m 325 Nm 4x 400N/marrow_forwardIn the beam below, calculate the shear force at point A. Take L=78 and remember that both the loads and the dimensions are expressed in terms of L. 143 1 DX A - Li 4 LhN 14LRN/m Х B 22 3 L.arrow_forwardCalculate the Shear Force at Point F on the beam below. Keep your answer in Newtons and make shear force positive to the right. A х 2m <2m E D 5m 1m Хт 325N1m 400N/m 8arrow_forwardThe normal force at C on the beam below is equal to: A ShN C X 15h N 8 ○ OkN 2.5kN 10kN ○ 12.5kN 1m Im 1m 1m;arrow_forwardCalculate the y coordinate of the of the centroid of the shape below. Take A= 18.5 8 6A 4A X 6Aarrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_iosRecommended textbooks for you
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