A starch heater is used to heat a solution of starch in a paper mill. The...
A starch heater is used to heat a solution of starch in a paper mill. The temperature is to be kept at 70 C while the inlet temperature is 35 C.
-
If the time constant of the heater is 12 min and the process gain is 1, determine the transfer function for the heating process, with respect to change in load (inlet temperature).
-
An electrical heater is being used in this case. It was determined that 2.34 kW of energy input are necessary to change the outlet temperature by 1 C. Determine the transfer function with respect to change in heater input (kW).
-
A thermocouple with a time constant of 0.5 min and a gain of 1 is being used for measurement. Draw a feedback control loop to control the starch temperature and determine the closed loop transfer functions for the servo and regulatory cases.
It is not necessary to solve the transfer functions for responses.
Homework Answers
Request Answer!
We need at least 10 more requests to produce the answer.
0 / 10 have requested this problem solution
The more requests, the faster the answer.
Add Answer to:
A starch heater is used to heat a solution of starch in a paper
mill. The...
Question 2 a) The following diagram show a liquid-level storage tank with q, and qi is...
Question 2 a) The following diagram show a liquid-level storage tank with q, and qi is the inlet and outlet volumetric flow rate of the tank. Ri is the resistance valve whereas Hi is the liquid level of the tank. Find the transfer function relating change in level, Qi', to the changes in flow rate into the tank, Q' (State your assumption) (10 marks) b) An electrically heated process is known to exhibit second order dynamics. The heater input change...
Question 2 2.1 Consider a stirred tank heater which is characterised by the following equation: z4 pCpE The tank ha...
Question 2 2.1 Consider a stirred tank heater which is characterised by the following equation: z4 pCpE The tank has a constant liquid volume V, 50 litres and a constant volumetric flow rate of F 10 litres/minute. For liquid water, the other parameters are pCp 1 kcal/ litre.°C. Determine the process gain and time constant of the system. 2.1.1 2.1.2 Write down the transfer function of the process. (9) 2.1.3 Determine the time-domain output of this process to a step...
Question 4 Liquid water enters a feedwater heater at inlet 1 with inlet conditions 15 MPa,...
Question 4 Liquid water enters a feedwater heater at inlet 1 with inlet conditions 15 MPa, 40°C at 60 kg/s. Another stream of water in saturated mixture enters the heater at inlet 2 at temperature of 175 °C. The heater operates at steady state and heat transfer to surrounding can be neglected. At exit 3, saturated liquid flows out at 275 kPa. Select two (2) different values of mixture quality at inlet 2 between 0.5 and 0.8, and subsequently plot...
The room shown in Figure 1 has a heater with heat flow rate input of q0. The thermal capacitances of the heater and the...
The room shown in Figure 1 has a heater with heat flow rate
input of q0. The thermal capacitances of the heater and the room
air are C1 and C2, respectively. The thermal resistances of the
heater–air interface and the room wall–ambient air interface are R1
and R2, respectively. The temperatures of the heater and the room
air are T1 and T2, respectively. The temperature outside the room
is T0, which is assumed to be constant.
a. Draw the circuit...
Heat transfer 1 Normal 1 No Spac.. Heading 1 Heading2 Title Subt Paragraph Styles Heat Transfer...
Heat transfer
1 Normal 1 No Spac.. Heading 1 Heading2 Title Subt Paragraph Styles Heat Transfer - Assignment 1 An ideal gas is heated from 50 C to 80 C, (a) at constant volume and (b) at constant pressure. For which case do you think the energy required will be greater? Why? 1. 2. Consider a house with a floor space of 200 m2 and an average height of 3 m at sea level essure is 101.3 kPa. Initially the...
Question A1 A single tank process has first order dynamics. When the inlet flow rate is...
Question A1 A single tank process has first order dynamics. When the inlet flow rate is chosen as the input and the level as the output, the transfer function is as follows. 5 G(s) - H(s) 2. (S) S +1 91(t) h(t) *7 q:(0) q2(t) Fig. Q.Al schematic of the liquid level process (a) Determine the system constant t and steady state gain K. [6 marks] (b) For a unit step input q, (t) = 1(1), determine the time response...
Design a heat exchanger for a gas turbine exhaust A paper mill has just purchased a...
Design a heat exchanger for a gas turbine exhaust A paper mill has just purchased a 5.7 MW gas turbine for electrical power generation. To increase the overall plant efficiency and reduce the payback time it has been decided to use the exhaust gases to heat water in a heat exchanger. The company requires 12.7 tonnes/hr of steam at a pressure of 18.9 Bar and at a temperature of 315oC. The temperature and pressure at inlet to the heat exchanger...
2. In the constant volume, stirred-tank heater shown in the figure below, the flow rates and...
2. In the constant volume, stirred-tank heater shown in the figure below, the flow rates and material properties are held constant. The tank contains a heating element, which is initially off and the tank is the same temperature as the inlet stream. When t=0, the heater is turned on to a constant heating rate Q. For this material, assume C = C = Cp = Cy. m,Ti P,V,C, T(t) ń, r(t) o a. Write a transient thermal energy balance to...
1)(Hint: Cp=1.005 kJ/kg-K, Cv=0.718 kJ/kg-K, R=0.287 kJ/kg-K). An air-tight room contains 80 kg of air, and...
1)(Hint: Cp=1.005 kJ/kg-K, Cv=0.718 kJ/kg-K, R=0.287 kJ/kg-K). An air-tight room contains 80 kg of air, and a 2-kW baseboard electric resistance heater in the room is turned on and kept on for 15 min. The temperature rise of air at the end of 15 min is 2)An example of when it is appropriate to model a substance as an ideal gas is when a. The pressure and temperature are close to the critcal point b. The pressure and temperature are...
(LMTD method) A 2 shell, 4 tube pass heat exchanger is beingused to heat 40...
(LMTD method) A 2 shell, 4 tube pass heat exchanger is being
used to heat 40 kg/s of a process fluid in the tubes from an inlet
temperature of 15°C to a target temperature of 70°C using
condensing steam at 150°C. The overall heat transfer coefficient
for a clean heat exchanger was Uo=1500W/m2.°C, however, the design
engineer neglected to take into account fouling of the heat
exchanger. After 5 years of use, fouling has occurred with fouling
factors of 0.0005m2.°C/W...
Question 2 a) The following diagram show a liquid-level storage tank with q, and qi is the inlet and outlet volumetric flow rate of the tank. Ri is the resistance valve whereas Hi is the liquid level of the tank. Find the transfer function relating change in level, Qi', to the changes in flow rate into the tank, Q' (State your assumption) (10 marks) b) An electrically heated process is known to exhibit second order dynamics. The heater input change...
Question 2 2.1 Consider a stirred tank heater which is characterised by the following equation: z4 pCpE The tank has a constant liquid volume V, 50 litres and a constant volumetric flow rate of F 10 litres/minute. For liquid water, the other parameters are pCp 1 kcal/ litre.°C. Determine the process gain and time constant of the system. 2.1.1 2.1.2 Write down the transfer function of the process. (9) 2.1.3 Determine the time-domain output of this process to a step...
Question 4 Liquid water enters a feedwater heater at inlet 1 with inlet conditions 15 MPa, 40°C at 60 kg/s. Another stream of water in saturated mixture enters the heater at inlet 2 at temperature of 175 °C. The heater operates at steady state and heat transfer to surrounding can be neglected. At exit 3, saturated liquid flows out at 275 kPa. Select two (2) different values of mixture quality at inlet 2 between 0.5 and 0.8, and subsequently plot...
The room shown in Figure 1 has a heater with heat flow rate
input of q0. The thermal capacitances of the heater and the room
air are C1 and C2, respectively. The thermal resistances of the
heater–air interface and the room wall–ambient air interface are R1
and R2, respectively. The temperatures of the heater and the room
air are T1 and T2, respectively. The temperature outside the room
is T0, which is assumed to be constant.
a. Draw the circuit...
Heat transfer
1 Normal 1 No Spac.. Heading 1 Heading2 Title Subt Paragraph Styles Heat Transfer - Assignment 1 An ideal gas is heated from 50 C to 80 C, (a) at constant volume and (b) at constant pressure. For which case do you think the energy required will be greater? Why? 1. 2. Consider a house with a floor space of 200 m2 and an average height of 3 m at sea level essure is 101.3 kPa. Initially the...
Question A1 A single tank process has first order dynamics. When the inlet flow rate is chosen as the input and the level as the output, the transfer function is as follows. 5 G(s) - H(s) 2. (S) S +1 91(t) h(t) *7 q:(0) q2(t) Fig. Q.Al schematic of the liquid level process (a) Determine the system constant t and steady state gain K. [6 marks] (b) For a unit step input q, (t) = 1(1), determine the time response...
2. In the constant volume, stirred-tank heater shown in the figure below, the flow rates and material properties are held constant. The tank contains a heating element, which is initially off and the tank is the same temperature as the inlet stream. When t=0, the heater is turned on to a constant heating rate Q. For this material, assume C = C = Cp = Cy. m,Ti P,V,C, T(t) ń, r(t) o a. Write a transient thermal energy balance to...
(LMTD method) A 2 shell, 4 tube pass heat exchanger is being
used to heat 40 kg/s of a process fluid in the tubes from an inlet
temperature of 15°C to a target temperature of 70°C using
condensing steam at 150°C. The overall heat transfer coefficient
for a clean heat exchanger was Uo=1500W/m2.°C, however, the design
engineer neglected to take into account fouling of the heat
exchanger. After 5 years of use, fouling has occurred with fouling
factors of 0.0005m2.°C/W...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago