EBK NUMERICAL METHODS FOR ENGINEERS
7th Edition
ISBN: 9780100254145
Author: Chapra
Publisher: YUZU
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 20, Problem 24P
As compared to the models from Probs. 20.22 and 20.23, a somewhat more sophisticated model that accounts for the effect of both temperature and chloride on dissolved oxygen saturation can be hypothesized as being of the form,
That is, a constant plus a third-order polynomial in temperature and a linear relationship in chloride are assumed to yield superior results. Use the general linear least-squares approach to fit this model to the data in Table P20.21. Use the resulting equation to estimate the dissolved oxygen concentration for a chloride concentration of 10 g/L at
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Project 1
100 150 200 250
20.
300
350
400
450
500
550
600
650
QIPINHFC-134a
700
200.
000124
-0.0014
0.0016
10.
Pressure-Enthalpy
0,0011
P00018
0.0020
8.
0.0013
0.0030
Diagram
100.
80.
6.
volume - 0.0040 mikg
(SI Units)
0.0060
60.
0.0080
0.010
40.
2.
0.015
0 020
20.
1.
0 030
0.8
0.040
0.6
10.
0.060
8.
0.4
0.080
temper
0.10
4.
a 02
0.15
0.20
2.
0.1
0.08
030
0.40
0.06
1.
0.8
0.60
0.04
0.6
O.80
1.0
0.4
0.02
15
20
0.2
0.01
100
150
200 250
300 350
400
450
0.1
700
500 550
600
650
Enthalpy (kJ/kg)
Refrigerant HFC-134a as the working fluid
Ideal cycle operation condition is assumed
Cycle is operated at high pressure line of 0.8 MPa
Cycle is operated at low temperature line of –10° C
- Flow rate is 0.1 kg/sec
The head of the department in the company that you are working in asked you to make use of pressure -
enthalpy chart provided for HFC-134a refrigerant
a. Estimate the reversible COP values, if the low and high medium temperature are as for
the evaporator and condenser.
Pressure (bar)…
The following table lists temperatures and specific volumes of water vapor at
two pressures:
p = 1.5 MPa
v(m³/kg)
p = 1.0 MPa
T ("C)
v(m³/kg)
T ("C)
200
0.2060
200
0.1325
240
280
0.2275
0.2480
240
280
0.1483
0.1627
Data encountered in solving problems often do not fall exactly on the grid of
values provided by property tables, and linear interpolation between adjacent
table entries becomes necessary. Using the data provided here, estimate
i. the specific volume at T= 240 °Č, p = 1.25 MPa, in m/kg
ii. the temperature at p = 1.5 MPa, v = 0.1555 m/kg, in °C
ii. the specific volume at T = 220 °C, p = 1.4 MPa, in m'/kg
Project 1
100
20.
150
200
250
300
350
400
450
500
550
600
650
QUPINHFC-134a
700
200.
00012
00013
0.0014
r0.0016
J00018
10.
Pressure-Enthalpy
0.0020
8.
0.0030
100.
80.
6.
Diagram
volume 0.0040 mikg
(SI Units)
0.0060
0 0080
0.010
4.
60.
40.
2.
0.015
0 020
20.
1.
0.8
0030
0.040
10.
8.
0.6
0.060
0.4
6.
0.080
010
0.2
0.15
020
2.
0.1
0.30
0.08
0.40
1.
0.8
0.06
060
0.04
0.6
O80
1.0
0.4
0.02
15
20
0.2
0.01
100
150
200
250 300
350 400
450
0.1
700
500
550
600
650
Enthalpy (kJ/kg)
Refrigerant HFC-134a as the working fluid
Ideal cycle operation condition is assumed
- Cycle is operated at high pressure line of 0.8 MPa
- Cycle is operated at low temperature line of – 10° C
- Flow rate is 0.1 kg/sec
The head of the department in the company that you are working in asked you to make use of pressure -enthalpy
chart provided for HFC-134a refrigerant
Task.1
1. Determine the Refrigeration effect (RE), heat of compression (HOC), and heat of rejection (HOR) and
their corresponding rate/power values in kW.…
Chapter 20 Solutions
EBK NUMERICAL METHODS FOR ENGINEERS
Ch. 20 - 20.1 Perform the same computation as in Sec. 20.1,...Ch. 20 - You perform experiments and determine the...Ch. 20 - 20.3 It is known that the tensile strength of a...Ch. 20 - Prob. 4PCh. 20 - 20.5 The specific volume of a superheated steam is...Ch. 20 - Prob. 6PCh. 20 - In Alzheimers disease, the number of neurons in...Ch. 20 - 20.8 The following data were taken from a stirred...Ch. 20 - Prob. 9PCh. 20 - Concentration data were taken at 15 time points...
Ch. 20 - Prob. 11PCh. 20 - The molecular weight of a polymer can be...Ch. 20 - 20.13 On average, the surface area A of human...Ch. 20 - 20.14 Determine an equation to predict metabolism...Ch. 20 - 20.15 Human blood behaves as a Newtonian fluid...Ch. 20 - 20.16 Soft tissue follows an exponential...Ch. 20 - 20.17 The thickness of the retina changes during...Ch. 20 - 20.18 The data tabulated below were generated from...Ch. 20 - The shear stresses, in kilopascals (kPa), of nine...Ch. 20 - 20.20 A transportation engineering study was...Ch. 20 - The saturation concentration of dissolved oxygen...Ch. 20 - For the data in Table P20.21, use polynomial...Ch. 20 - 20.23 Use multiple linear regression to derive a...Ch. 20 - 20.24 As compared to the models from Probs. 20.22...Ch. 20 - 20.25 In water-resources engineering, the sizing...Ch. 20 - 20.26 The concentration of total phosphorus and...Ch. 20 - 20.27 The vertical stress under the corner of a...Ch. 20 - Three disease-carrying organisms decay...Ch. 20 - 20.29 The mast of a sailboat has a cross-sectional...Ch. 20 - 20.30 Enzymatic reactions are used extensively to...Ch. 20 - 20.31 Environmental engineers dealing with the...Ch. 20 - An environmental engineer has reported the data...Ch. 20 - The following model is frequently used in...Ch. 20 - 20.34 As a member of Engineers Without Borders,...Ch. 20 - 20.35 Perform the same computations as in Sec....Ch. 20 - 20.36 You measure the voltage drop V across a...Ch. 20 - Duplicate the computation for Prob. 20.36, but use...Ch. 20 - The current in a wire is measured with great...Ch. 20 - 20.39 The following data was taken from an...Ch. 20 - It is known that the voltage drop across an...Ch. 20 - Ohms law states that the voltage drop V across an...Ch. 20 - 20.42 Repeat Prob. 20.41 but determine the...Ch. 20 - 20.43 An experiment is performed to determine the...Ch. 20 - Bessel functions often arise in advanced...Ch. 20 - 20.45 The population of a small community on the...Ch. 20 - Based on Table 20.4, use linear and quadratic...Ch. 20 - 20.47 Reproduce Sec. 20.4, but develop an equation...Ch. 20 - 20.48 Dynamic viscosity of water is related to...Ch. 20 - 20.49 Hooke’s law, which holds when a spring is...Ch. 20 - 20.50 Repeat Prob. 20.49 but fit a power curve to...Ch. 20 - The distance required to stop an automobile...Ch. 20 - An experiment is performed to define the...Ch. 20 - The acceleration due to gravity at an altitude y...Ch. 20 - The creep rate is the time rate at which strain...Ch. 20 - 20.55 It is a common practice when examining a...Ch. 20 - The relationship between stress and the shear...Ch. 20 - The velocity u of air flowing past a flat surface...Ch. 20 - 20.58 Andrade’s equation has been proposed as a...Ch. 20 - Develop equations to fit the ideal specific heats...Ch. 20 - 20.60 Temperatures are measured at various points...Ch. 20 - 20.61 The data below were obtained from a creep...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
|4.2| = ?
Basic Technical Mathematics
Analytic Functions. Find fz=ux,y+ivx,y with u or v as given. Check by the Cauchy Reimann equations for analyti...
Advanced Engineering Mathematics
(a) Show that (x) = x2 is an explicit solution to xdydx = 2y on the interval (, ). (b) Show that (x) = ex x is...
Fundamentals of Differential Equations (9th Edition)
38. Getting Hired The odds against Ishaq getting hired for a job are 3 : 8 Determine the probability
Ishaq gets...
A Survey of Mathematics with Applications (10th Edition) - Standalone book
In the following exercises, multiply the monomials. 138. (14d5)(36d2)
Elementary Algebra
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- 1. The observed and model simulated average daily flow in month flow at the outlet of a river catchment during a given period is presented as follows. Predicted flow Observed flow 0.25 0.30 0.70 0.73 0.80 0.87 0.71 0.90 0.71 0.65 1.60 1.45 0.90 0.70 0.71 0.61 0.24 0.22 1.00 0.64 0.81 1.00 1.05 0.90 0.46 0.48 0.27 0.23 0.80 0.24 0.32 0.42 0.80 0.89 (i) Evaluate the model performance based on any two computed statistical measures of performance of your choice. (ii) Explain possible reasons for model performance observed in (i) above. (Hint: Refer to reading material provided on model evaluation by Moriasi et al., 2007)arrow_forwardThe SCAL results for a core sample taken from an exploration well is as follows: Capillary pressure, P (psia) Water saturation, (%) 100 Water density 64 lb/ft3 4.4 100 Oil density = 45 lb/ft3 %3D 5.3 90.1 5.6 82.4 10.5 43.7 15.7 32.2 35.0 29.8 76.5 Dementa of Reservoir Rock and Fluid Properties Ch4-Saturation and Capilary Pressure Slde 51 Exercise A P U ASIA PACInc UNIVERSITY or TECHNOLOGYA ovanoN L Convert the capillary pressure table to water saturation and height, H in ft. Plot H vs Sw. 19.5 Indicate the FWL, OWC and transition zone on the plot. LA sample was taken from a depth 80 ft above the OWC. What is the expected Sw of the sample at that elevation.arrow_forwardProject 1 100 20. 150 200 250 300 350 400 450 500 550 600 650 CUPONTHFC-134a 700 200. 0.0016 1- 00018 10. Pressure-Enthalpy 0.0014 000124 0.0020 8. 0.0030 100. 80. 6. Diagram volume-0.0040 mikg (SI Units) 0.0060 0 0080 0.010 60. 40. 2. 0.015 0 020 20. 0030 0.8 0.040 10. 8. 0.6 0.060 0.4 6. 0 080 010 0.2 0.15 020 2. 0.1 0.08 0.30 0.40 1. 0.8 0.06 060 0.04 0.6 O80 1.0 0.4 0.02 1.5 20 0.2 0.01 100 150 200 250 300 350 400 450 0.1 700 500 550 600 650 Enthalpy (kJ/kg) Refrigerant HFC-134a as the working fluid - Ideal cycle operation condition is assumed Cycle is operated at high pressure line of 0.8 MPa Cycle is operated at low temperature line of – 10° C - Flow rate is 0.1 kg/sec The head of the department in the company that you are working in asked you to make use of pressure - enthalpy chart provided for HFC-134a refrigerant a. Construct didactic sketches, showing the operating principles of a refrigeration system Pressure (bar) 4. -Dozz -auneadu H 061 ta 091 Ti 1000 06 0 - --- 99'O 09…arrow_forward
- Q1. A forward-feed double-effect evaporator, having 10 m2 of heating surface in each effect, is used to concentrate 1 kg/s of caustic soda solution from 10 per cent by mass to 30%. During a particular run, when the feed is at 373 K, the pressures in the two calandrias are 375 and 180 kN/m2 respectively, while the condenser operates at 30 kN/m². For these :conditions, calculate .the load on the condenser (a) the steam economy (b) the overall heat transfer coefficient in each (c) .effect Would there have been any advantages in using backward feed in this case? Heat losses to the .surroundings are negligiblearrow_forwardIn the Fig. 2 below, let Ki = K2 = K and ti = t=t. %3D T -T X Fig. 2 (a) Let T= 0 °C and T= 200 °C. Solve for T: and unknown rates of heat flow in term of k and t. MEC_AMO_TEM_035_02 Page 2 of 11 Finite Element Analysis (MECH 0016.1) – Spring - 2021 -Assignment 2-QP (b) Let T- 400 °C and let fs have the prescribed value f. What are the unknowns? Solve for them in term of K, t, and f.arrow_forwardThe following related values of the pressure p in kN/m2 and the volume V in cubic meter where measured from the compression curve of an internal combustion engine indicator diagram. Assuming that P and V are connected by the law PVn: C, find the value of n. p 3450 2350 1725 680 270 130 V .0085 .0113 .0142 .0283 .0566 .0991arrow_forward
- Read the questions carefully and answer with complete solution and units. Use the steam tables provided and use 4 decimal places for solving. Final answers shown are in 2 decimal places. Draw the T-S diagrams properly with respect to the saturation line A steam power plant uses the ideal Reheat-Regenerative Rankine cycle where the steam enters the high-pressure turbine at 4 MPa and 300C. It partially expands to 600 kPa where some steam is extracted for feedwater heating while the rest is reheated to the same temperature. After expanding again, it enters the condenser at 10 kPa. Sketch the schematic diagram and the TS diagram with labeled points, and solve for mass taken for feedwater heating, Qa, Qr, Wt, Wp, Wnet, thermal efficiency, and Steam rate. Neglect the condensate pump work. 20.01%, 2667.841,1715.52,955.97, 3.74,952.32¹,3 35.69%, 3.78- kg kg kg kg kWh Iarrow_forwardThe simple dynamic method is used to measure kļa in a fermenter operated at 30 C and 1 atm pressure. Data for the dissolved oxygen concentration as a function of time during the reoxygenation step are as follows: Time (s) CAL (% air saturation) 10 43.5 15 53.5 20 60.0 30 67.5 40 70.5 50 72.0 70 73.0 100 73.5 130 73.5 (a) Calculate the value of kla.arrow_forwardConsider a traffic flow network of a sector of the city dependent on the parametersh and k. G00 600 a) Obtain a relation between h and k so that the corresponding system has a solution.arrow_forward
- Given: Consider an adiabatic steam turbine operating at steady-flow conditions. The known operating conditions are: Inlet conditions Exit (outlet) conditions Pressure (MPa) Temperature (°C) Velocity (m/s) Steam quality Mass flow rate (kg/s) Elevation (height) (m) 10 450 0.010 80.01 50.01 91.9 % 12.01 9.0 9.0 Required: Draw clear and consistent schematic for the problem representing the inlet and exit (outlet) conditions and label your schematic with the given conditions. Analyze the problem systematically using step-by-step CV energy and mass analyses, justify the equations, state your assumptions, and determine the following (circle your final answers): (a) The specific enthalpy values at inlet and exit of the turbine. (b) The mass flow rate of steam at exit. (c) The specific heat transfer. (d) The rate of change in the kinetic energy of the steam between inlet and exit. (e) The power output generated by the turbine. (f) The specific work output. (g) The specific volumes at inlet and…arrow_forwardFill in the blanks pertinent to 1 kg R22 Item Unknown phase P h SBL SPH %x %y u L/kg kl/kg kJ/kg K kl/kg КРа 1609.6 1.76713 2 1354.8 1.74463 3 548.06 300 4 1460.1 35 5 48 260.497 6 -5 403.496arrow_forwardyo 9:1V i %A LO äbä 20 A ladder 13 ft long is leaning against a wall. The bottom of the ladder is being pulled away from the wall at the constant rate of 6 ft/min. How fast is the top of the ladder moving down the wall when the bottom of the * ?ladder is5 ft from the wall 13 y 6 ft/min 2.5 3.5arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning
Principles of Heat Transfer (Activate Learning wi...
Mechanical Engineering
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Cengage Learning
Correlation Vs Regression: Difference Between them with definition & Comparison Chart; Author: Key Differences;https://www.youtube.com/watch?v=Ou2QGSJVd0U;License: Standard YouTube License, CC-BY
Correlation and Regression: Concepts with Illustrative examples; Author: LEARN & APPLY : Lean and Six Sigma;https://www.youtube.com/watch?v=xTpHD5WLuoA;License: Standard YouTube License, CC-BY