Engineering Your Future
9th Edition
ISBN: 9780190279264
Author: William C. Oakes, Les L. Leone
Publisher: Oxford University Press, USA
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Chapter 17, Problem 17.80EAA
To determine
Determine the present worth of the payment of $200 due at the end of each year for 10 years at an annual interest rate of 6%.
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The evaporator of a vapor compression refrigeration cycle utilizing R-123 as the refrigerant isbeing used to chill water. The evaporator is a shell and tube heat exchanger with the water flowingthrough the tubes. The water enters the heat exchanger at a temperature of 54°F. The approachtemperature difference of the evaporator is 3°R. The evaporating pressure of the refrigeration cycleis 4.8 psia and the condensing pressure is 75 psia. The refrigerant is flowing through the cycle witha flow rate of 18,000 lbm/hr. The R-123 leaves the evaporator as a saturated vapor and leaves thecondenser as a saturated liquid. Determine the following:a. The outlet temperature of the chilled waterb. The volumetric flow rate of the chilled water (gpm)c. The UA product of the evaporator (Btu/h-°F)d. The heat transfer rate between the refrigerant and the water (tons)
(Read image) (Answer given)
Problem (17): water flowing in an open channel of a rectangular cross-section with width (b) transitions from a
mild slope to a steep slope (i.e., from subcritical to supercritical flow) with normal water depths of (y₁) and
(y2), respectively.
Given the values of y₁ [m], y₂ [m], and b [m], calculate the discharge in the channel (Q) in [Lit/s].
Givens:
y1 = 4.112 m
y2 =
0.387 m
b = 0.942 m
Answers:
( 1 ) 1880.186 lit/s
( 2 ) 4042.945 lit/s
( 3 ) 2553.11 lit/s
( 4 ) 3130.448 lit/s
Chapter 17 Solutions
Engineering Your Future
Ch. 17 - Prob. 17.1EAACh. 17 - Prob. 17.2EAACh. 17 - Prob. 17.3EAACh. 17 - Prob. 17.4EAACh. 17 - Prob. 17.5EAACh. 17 - Prob. 17.6EAACh. 17 - Prob. 17.7EAACh. 17 - Prob. 17.8EAACh. 17 - Prob. 17.9EAACh. 17 - Prob. 17.10EAA
Ch. 17 - Prob. 17.11EAACh. 17 - Prob. 17.12EAACh. 17 - Prob. 17.13EAACh. 17 - Prob. 17.14EAACh. 17 - Prob. 17.15EAACh. 17 - Prob. 17.16EAACh. 17 - Prob. 17.17EAACh. 17 - Prob. 17.18EAACh. 17 - Prob. 17.19EAACh. 17 - Prob. 17.20EAACh. 17 - Prob. 17.21EAACh. 17 - Prob. 17.22EAACh. 17 - Prob. 17.23EAACh. 17 - Prob. 17.24EAACh. 17 - Prob. 17.25EAACh. 17 - Prob. 17.26EAACh. 17 - Prob. 17.27EAACh. 17 - Prob. 17.28EAACh. 17 - Prob. 17.29EAACh. 17 - Prob. 17.30EAACh. 17 - Prob. 17.31EAACh. 17 - Prob. 17.32EAACh. 17 - Prob. 17.33EAACh. 17 - Prob. 17.34EAACh. 17 - Prob. 17.35EAACh. 17 - Prob. 17.36EAACh. 17 - Prob. 17.37EAACh. 17 - Prob. 17.38EAACh. 17 - Prob. 17.39EAACh. 17 - Prob. 17.40EAACh. 17 - Prob. 17.41EAACh. 17 - Prob. 17.42EAACh. 17 - Prob. 17.43EAACh. 17 - Prob. 17.44EAACh. 17 - Prob. 17.45EAACh. 17 - Prob. 17.46EAACh. 17 - Prob. 17.47EAACh. 17 - Prob. 17.48EAACh. 17 - Prob. 17.49EAACh. 17 - Prob. 17.50EAACh. 17 - Prob. 17.51EAACh. 17 - Prob. 17.52EAACh. 17 - Prob. 17.53EAACh. 17 - Prob. 17.54EAACh. 17 - Prob. 17.55EAACh. 17 - Prob. 17.56EAACh. 17 - Prob. 17.57EAACh. 17 - Prob. 17.58EAACh. 17 - Prob. 17.59EAACh. 17 - Prob. 17.60EAACh. 17 - Prob. 17.61EAACh. 17 - Prob. 17.62EAACh. 17 - Prob. 17.63EAACh. 17 - Prob. 17.64EAACh. 17 - Prob. 17.65EAACh. 17 - Prob. 17.66EAACh. 17 - Prob. 17.67EAACh. 17 - Prob. 17.68EAACh. 17 - Prob. 17.69EAACh. 17 - Prob. 17.70EAACh. 17 - Prob. 17.71EAACh. 17 - Prob. 17.72EAACh. 17 - Prob. 17.73EAACh. 17 - Prob. 17.74EAACh. 17 - Prob. 17.75EAACh. 17 - Prob. 17.76EAACh. 17 - Prob. 17.77EAACh. 17 - Prob. 17.78EAACh. 17 - Prob. 17.79EAACh. 17 - Prob. 17.80EAACh. 17 - Prob. 17.81EAACh. 17 - Prob. 17.82EAACh. 17 - Prob. 17.83EAACh. 17 - Prob. 17.84EAACh. 17 - Prob. 17.85EAACh. 17 - Prob. 17.86EAA
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- Problem (14): A pump is being used to lift water from an underground tank through a pipe of diameter (d) at discharge (Q). The total head loss until the pump entrance can be calculated as (h₁ = K[V²/2g]), h where (V) is the flow velocity in the pipe. The elevation difference between the pump and tank surface is (h). Given the values of h [cm], d [cm], and K [-], calculate the maximum discharge Q [Lit/s] beyond which cavitation would take place at the pump entrance. Assume Turbulent flow conditions. Givens: h = 120.31 cm d = 14.455 cm K = 8.976 Q Answers: (1) 94.917 lit/s (2) 49.048 lit/s ( 3 ) 80.722 lit/s 68.588 lit/s 4arrow_forwardProblem (13): A pump is being used to lift water from the bottom tank to the top tank in a galvanized iron pipe at a discharge (Q). The length and diameter of the pipe section from the bottom tank to the pump are (L₁) and (d₁), respectively. The length and diameter of the pipe section from the pump to the top tank are (L2) and (d2), respectively. Given the values of Q [L/s], L₁ [m], d₁ [m], L₂ [m], d₂ [m], calculate total head loss due to friction (i.e., major loss) in the pipe (hmajor-loss) in [cm]. Givens: L₁,d₁ Pump L₂,d2 오 0.533 lit/s L1 = 6920.729 m d1 = 1.065 m L2 = 70.946 m d2 0.072 m Answers: (1) 3.069 cm (2) 3.914 cm ( 3 ) 2.519 cm ( 4 ) 1.855 cm TABLE 8.1 Equivalent Roughness for New Pipes Pipe Riveted steel Concrete Wood stave Cast iron Galvanized iron Equivalent Roughness, & Feet Millimeters 0.003-0.03 0.9-9.0 0.001-0.01 0.3-3.0 0.0006-0.003 0.18-0.9 0.00085 0.26 0.0005 0.15 0.045 0.000005 0.0015 0.0 (smooth) 0.0 (smooth) Commercial steel or wrought iron 0.00015 Drawn…arrow_forwardThe flow rate is 12.275 Liters/s and the diameter is 6.266 cm.arrow_forward
- An experimental setup is being built to study the flow in a large water main (i.e., a large pipe). The water main is expected to convey a discharge (Qp). The experimental tube will be built at a length scale of 1/20 of the actual water main. After building the experimental setup, the pressure drop per unit length in the model tube (APm/Lm) is measured. Problem (20): Given the value of APm/Lm [kPa/m], and assuming pressure coefficient similitude, calculate the drop in the pressure per unit length of the water main (APP/Lp) in [Pa/m]. Givens: AP M/L m = 590.637 kPa/m meen Answers: ( 1 ) 59.369 Pa/m ( 2 ) 73.83 Pa/m (3) 95.443 Pa/m ( 4 ) 44.444 Pa/m *******arrow_forwardFind the reaction force in y if Ain = 0.169 m^2, Aout = 0.143 m^2, p_in = 0.552 atm, Q = 0.367 m^3/s, α = 31.72 degrees. The pipe is flat on the ground so do not factor in weight of the pipe and fluid.arrow_forwardFind the reaction force in x if Ain = 0.301 m^2, Aout = 0.177 m^2, p_in = 1.338 atm, Q = 0.669 m^3/s, and α = 37.183 degreesarrow_forward
- Problem 5: Three-Force Equilibrium A structural connection at point O is in equilibrium under the action of three forces. • • . Member A applies a force of 9 kN vertically upward along the y-axis. Member B applies an unknown force F at the angle shown. Member C applies an unknown force T along its length at an angle shown. Determine the magnitudes of forces F and T required for equilibrium, assuming 0 = 90° y 9 kN Aarrow_forwardProblem 19: Determine the force in members HG, HE, and DE of the truss, and state if the members are in tension or compression. 4 ft K J I H G B C D E F -3 ft -3 ft 3 ft 3 ft 3 ft- 1500 lb 1500 lb 1500 lb 1500 lb 1500 lbarrow_forwardProblem 14: Determine the reactions at the pin A, and the tension in cord. Neglect the thickness of the beam. F1=26kN F2 13 12 80° -2m 3marrow_forward
- Problem 22: Determine the force in members GF, FC, and CD of the bridge truss and state if the members are in tension or compression. F 15 ft B D -40 ft 40 ft -40 ft 40 ft- 5 k 10 k 15 k 30 ft Earrow_forwardProblem 20: Determine the force in members BC, HC, and HG. After the truss is sectioned use a single equation of equilibrium for the calculation of each force. State if the members are in tension or compression. 5 kN 4 kN 4 kN 3 kN 2 kN B D E F 3 m -5 m- -5 m- 5 m 5 m-arrow_forwardAn experimental setup is being built to study the flow in a large water main (i.e., a large pipe). The water main is expected to convey a discharge (Qp). The experimental tube will be built at a length scale of 1/20 of the actual water main. After building the experimental setup, the pressure drop per unit length in the model tube (APm/Lm) is measured. Problem (19): Given the value of Qp [m³/s], and assuming Reynolds number similitude between the water main and experimental tube, calculate the flow rate in the model tube (Qm) in [lit/s]. = 30.015 m^3/sarrow_forward
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