Selectors are normally used in combustion control systems to prevent unsafe situations from occurring. Figure E. shows
Question:
Selectors are normally used in combustion control systems to prevent unsafe situations from occurring. Figure E. shows the typical configuration for high and low selectors are applied to air and fuel flow rates. The energy demand signal comes from the steam pressure controller. Discuss how the selectors operate in this control scheme when the furnace temperature dropssuddenly.
FC FT FC FT Fire! flow Air flow rate rate PT Furnace Steam Water
Step by Step Answer:
The amounts of air and fuel are changed in response to the s...View the full answer
Process Dynamics And Control
ISBN: 978-0471000778
2nd Edition
Authors: Dale E. Seborg, Thomas F. Edgar, Duncan A. Mellich
Related Video
In this video, the concept of pressure has been explained. The bottle is filled up with water, remove the pipe, and now you can see the clear flow of water from the holes due to liquid pressure.You can see that the second layer is holding the weight of the first layer and the third layer holding the weight of both upper layers, that’s why liquid flows out wider from the third as compared to the first two.At the first hole, water doesn’t roll along the walls; it flows out at an angle.At the second hole, you’ll see that the water flows out at a wider angle as compared to the first hole.At the third hole, we can see that the flow of water is much wider/greater than the other holes.This proves that the pressure at the bottom of the bottle is much more than the pressure at the top layers. P = ????gh
Students also viewed these Chemical Engineering questions
-
Tides the table at the right shows the times for high tide and low tide of one day. The markings on the side of the local pier showed a high tide of 7ft and a low tide of 4ft on the previous day....
-
Refer to the data set for high and low temperatures for 20 cities in exercise 46. In exercise 46 a. Develop a scatter diagram to show the relationship between the two variables, high temperature and...
-
Figure 20-10 shows a temperature profile for a furnace atomic absorption experiment. Explain the purpose of each different part of the heating profile.
-
An abc-sequence balanced three-phase wye-connected source supplies power to a balanced wye-connected load. The line impedance per phase is 1 + j10, and the load impedance per phase is 20 + j20. If...
-
Recalculate Dynamic Mattress's 2017 financing plan (Table 19.6), assuming that the firm wishes to maintain a minimum cash balance of $30 million instead of $25 million. Assume the firm can convince...
-
Yancey Productions is a film studio that uses a job-order costing system. The company's direct materials consist of items such as costumes and props. Its direct labor includes each film's actors,...
-
Calculate \(r\) for the air velocities and evaporation coefficients of Example 2. Also, assuming that the necessary assumptions can be met, test the null hypothesis \(ho=0\) against the alternative...
-
At December 31, 2010, the trial balance of Worcester Company contained the following amounts before adjustment. Instructions (a) Based on the information given, which method of accounting for bad...
-
Solve by factoring. 5x2-16x+12=0
-
Create a payroll program named CalcPay that allows the user to enter two double value sand a string namely hours worked, hourly rate and name. After the user enters the rate, hours, and name the...
-
The pressure of a reactor vessel can be adjusted by changing either the inlet or outlet gaseous flow rate. The outlet flow is kept fixed as long as the tank pressure remains between 100 and 120 psi,...
-
Buckley et al. (l985) discuss using a selector to control condensate temperature at 100oC in a reflux drum, where the manipulated variable is the cooling water flow rate. If the condensate...
-
What product factors affect the rate of adoption of innovations?
-
A manager who is reactive and works hard to address problems after they occur is known as a ____________. (a) problem seeker (b) problem avoider (c) problem solver (d) problem manager
-
The main purpose of organizing as a management function is to ____________. (a) make sure that results match plans (b) arrange people and resources to accomplish work (c) create enthusiasm for the...
-
Which type of plan is used to guide resource allocations for long term advancement of the organizations mission or purpose? (a) Tactical (b) Operational (c) Strategic (d) Functional
-
A good performance objective is written in such a way that it __________. (a) has no precise timetable (b) is general and not too specific (c) is almost impossible to accomplish (d) can be easily...
-
The assigning of probabilities for action alternatives and their consequences indicates the presence of ____________ in the decision environment. (a) certainty (b) optimizing (c) risk (d) satisficing
-
A rod is bent in the middle by angle \(\alpha\). The bottom portion is kept vertical and the top portion is therefore oriented at angle \(\alpha\) to the vertical. A bead of mass \(m\) is slipped...
-
A container holds 2.0 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of an 8.0 10-3-kg bullet with a speed of 770 m/s. What is the...
-
On the Internet, access the website of a major battery company, such as Rayovac, Duracell, or Eveready (Energizer). Search the site for a battery type not covered in this chapter. Find out all you...
-
Poissons ratio is a material property and is the ratio of the lateral strain and the longitudinal strain for a member in tension. For a homogeneous, isotropic material, the modulus of rigidity G is...
-
A specimen of medium-carbon steel having an initial diameter of 0.503 in was tested in tension using a gauge length of 2 in. The following data were obtained for the elastic and plastic states: Note...
-
Compute the true stress and the logarithmic strain using the data of Prob. 29 and plot the results on log-log paper. Then find the plastic strength coefficient 0 and the strain-strengthening exponent...
-
You obtained job-related information about the HR assistant position from O*Net. Answer the following sections based on that information. QUESTIONS: The following is the list of questions included in...
-
Marcia Stanton is the new manager of the materials storeroom for Taylor Manufacturing. Marcia has been asked to estimate future monthly purchase costs for part #696, used in two of Taylor's products....
-
Miller Company's contribution format income statement for the most recent month is shown below: Sales (37,000 units) Variable expenses Contribution margin Fixed expenses Net operating income...
Study smarter with the SolutionInn App