Hysys Tutorial 4n5r15
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66 Process Simulation using HYSYS
Section II: Tutorials
Solution: Follow the step-by-step instructions to solve the problem. 1- Open a new case.
Tutorial 1 Physical Properties
2- Add a new component list Problem 1: Physical Properties of Water Calculate the properties of a stream of water at 25 ºC and 1 atm with mass flow rate of 125 kg/hr.
Tutorial 1 Physical Properties 67
68 Process Simulation using HYSYS
3- Select water from the Components list and then close the active window by clicking on cross button.
5- Select the Fluid Package (Make sure selecting Component List -1in the component list).
4- The cross button is not seen on the figure and you could move the active window to see the cross button in order to close it.
6- Add a new Fluid Package
`
Tutorial 1 Physical Properties 69
7- Select the Peng Robinson or SRK equation of state from Property Package.
8- Close the Fluid Package by clicking on cross button. After this step, it is also possible to import /export the Fluid Package. Enter to Simulation Environment.
70 Process Simulation using HYSYS
9- Drag a material stream to the PFD. (Choose the stream from the Object Palette by pressing F4 or by F11). Rename the stream if needed.
10- Save the simulation work (e.g., problem-1).
Tutorial 1 Physical Properties 71
72 Process Simulation using HYSYS
11- For the N components stream, N+2 parameters are needed. Enter 2 out of 3 (temperature, pressure and vapor fraction) and mass flowrate in the Worksheet/Conditions page:
13- The stream properties can now be calculated (seen in the Worksheet/Properties page). Items in blue and black indicate -defined and calculated properties, respectively.
12- Enter 1 for mole fraction of water in the Worksheet/Composition page.
14- By putting the curser on the stream, the Fly-By window appears showing the main properties of the stream.
Tutorial 1 Physical Properties 73
Problem 2: T-xy diagram Plot the T-xy diagram for the binary mixture of 1-butanol and water.
74 Process Simulation using HYSYS
Solution: Follow the step-by-step instructions to solve the problem. 1- Open a new case.
2- Add a new component list
Tutorial 1 Physical Properties 75
3- Select 1-butanol and water from components list then close the active window by clicking on cross button.
4- The cross button is not seen on the figure and you could move the active window to see the cross button in order to close it.
76 Process Simulation using HYSYS
5- Select the Fluid Package (Make sure selecting Component List -1in the component list).
6- Add a new Fluid Package.
Tutorial 1 Physical Properties 77
78 Process Simulation using HYSYS
7- Select the UNIQUAC activity model from Property Package.
9- Drag a material stream to the PFD. (Choose the stream from the Object Palette by pressing F4 or by F11). Rename the stream to H2O.
8- Close the Fluid Package by clicking on cross button. After this step, it is possible to import/export the Fluid Package. You may now enter to Simulation Environment.
10- Save the simulation work (e.g., problem-2).
Tutorial 1 Physical Properties 79
80 Process Simulation using HYSYS
11- Select another material stream for 1-butanol. Define both streams (100 °C and 1 atm) as outlined in the previous problem.
13- Use the set function from the Object Palette to keep the total molar flow of these streams equal to 1. In this way, independent mole fraction variables could be defined for mixture.
12- Enter the molar flow rate for water stream (e.g., 0.7 kmole/hr) and its composition (mole fraction=1) in order to fully define this stream. Enter the composition of 1-butanol stream (mole fraction=1).
14- Double click on the set icon to define the target variable (1-butanol molar flow).
Tutorial 1 Physical Properties 81
15- Choose H2O as a source stream.
16- Click on the parameters section to define the multiplier and offset in order to keep the total molar flow rate of these streams equal to 1. The molar flow rate of the second stream is adjusted so that the total molar flow rates of these two streams remain constant.
82 Process Simulation using HYSYS
17- There are different ways to keep the total molar flow rate of these streams constant instead of using set. For example, use a mixer (from the object pallet) and set the molar flow rate of outlet stream to 1 kmole/hr. The flow rate of 1-butanol stream is adjusted accordingly.
18- Connect the inlet and outlet streams by double clicking on the Mixer. (The stream properties can now be calculated).
Tutorial 1 Physical Properties 83
19- In order to plot the T-xy diagram, the bubble and dew point should be calculated for the water stream flowrate varying from 0 to 1. A Heater and a Cooler are added to the flow sheet for this purpose.
20- Assume no pressure drop in the Heater and the Cooler (Constant pressure for T-xy).
84 Process Simulation using HYSYS
21- To calculate the bubble and dew point for a given flowrate of water stream (0.7 kmole/hr), set the vapor fraction at the exit of the Heater and Cooler equal to zero and one, respectively.
22- To plot the figure, press Ctrl+D to open Databook.
Tutorial 1 Physical Properties 85
23- Click on insert button in order to sample the variables from the flowsheet.
24- Sample the variables from the flowsheet (temperature for S-bubble stream, S-dew stream and flowrate of water stream).
86 Process Simulation using HYSYS
25- Go to case studies and add a new case.
26- Choose the molar flow as an independent variable (to represent x in T-xy) and the temperatures as dependent variables (to represent T in T-xy) and then press view.
Tutorial 1 Physical Properties 87
27- Specify the low, high bound and step size values of independent variable and press start.
28- After the completion of simulation, press Results button to view the T-xy diagram.
. Different thermodynamic models may be selected to generate T-xy diagram and to compare the simulation data with the experimental data to figure out the proper physical property models to be employed in simulation.
88 Process Simulation using HYSYS
Problem 3 Flash Calculations Consider a stream of gas (T=40 ºC and P=30 kg/cm2) containing methane, ethane, propane, n-butane and n-pentane with molar flow rates of 60, 25, 15, 10 and 10 kmole/hr, respectively. Calculate: a) Pressure of dew point at 40 ºC. b) Pressure of bubble point at 40 ºC. c) Temperature of dew point at 30 kg/cm2. d) Temperature of bubble point at 30 kg/cm2. e) Stream enters to a separator. Calculate properties of outlet streams. f) Plot outlet molar flow rate of ethane in the gas stream as a function of the operating temperature (sensitivity analysis). g) Adjust the drum temperature to reach 50% liquid.
Tutorial 1 Physical Properties 89
Solution:
90 Process Simulation using HYSYS
3- Select components from components list, then close the active window.
Follow the step-by-step instructions to solve the problem. 1- Open a new case.
4- The cross button is not seen on the figure and you could move the active window to see the cross button in order to close it. 2- Add a new component list
Tutorial 1 Physical Properties 91
5- Select the Fluid Package (Make sure selecting Component List -1in the component list).
6- Add a new Fluid Package.
92 Process Simulation using HYSYS
7- Select the Peng Robinson equation of state from Property Package.
8- Close the Fluid Package by clicking on cross button. After this step, it is possible to import/export the Fluid Package. You may now enter to Simulation Environment.
Tutorial 1 Physical Properties 93
9- Drag a material stream to the PFD and enter two out of three properties (temperature, pressure and vapor fraction) in the Worksheet/Conditions page.
10- Save the simulation work (e.g., problem-3).
94 Process Simulation using HYSYS
11- Enter molar flow rate of components in the Worksheet/Composition page.
8- By pressing OK button, the properties of stream will be calculated.
Tutorial 1 Physical Properties 95
96 Process Simulation using HYSYS
a) For calculating the dew point pressure at 40 ºC, first erase the pressure of the stream. Then enter 1 in vapor/phase fraction of stream. (Pressure of dew point is 1105.5 kPa).
c) For calculating the temperature of dew point, erase the temperature, and then enter 30 kg/cm2 for pressure and 1 for vapor fraction. The dew point temperature is 68.092 ºC.
b) For calculating the bubble point pressure at 40 ºC, enter 0 in vapor/phase fraction of stream. Pressure of bubble point is 10775 kPa.
d) For calculating the temperature of bubble point at 30 kg/cm2, enter 0 for vapor/phase fraction of stream. Temperature of bubble point is calculated to be -73.314 ºC.
Tutorial 1 Physical Properties 97
98 Process Simulation using HYSYS
e) Return the stream conditions (temperature and pressure) to initial conditions (40 ºC and 30 kg/cm2). Then put a separator on the PFD from the Object Palette (F4).
The properties of streams are seen in the Worksheet/Conditions page.
Double click on the separator to open it. Enter inlet and outlet vapor and liquid streams on the Design/Connections page. The calculation is performed for an adiabatic separator immediately.
f) To complete a sensitivity analysis, go to Tools/Databook or press Ctrl+D.
Tutorial 1 Physical Properties 99
100 Process Simulation using HYSYS
At the first page of Databook, variables appear, use insert to sample variables from flowsheet.
Select molar flow rate of ethane from the vapor outlet stream (stream vap).
From the variable navigator, select the object and variable, e.g., choose 1 as object and its temperature as variable, press add button to select another variable.
Then go to the Case Studies page and add a new case study by clicking on the Add button.
Tutorial 1 Physical Properties 101
Specify temperature as an independent and molar flow rate of ethane as a dependent variable.
Click on the view button and enter low, high bonds and step size values for the independent variable. Number of states will be calculated by HYSYS.
102 Process Simulation using HYSYS
Press Start button and then go to the Results page to see the plot or table. The results may be exported to any spreadsheet software for further processing.
g) In order to adjust the drum temperature to reach the 50% liquid, the duty should be specified for drum to be able to run it isothermally.
Tutorial 1 Physical Properties 103
At this stage, the specifications for the drum are incomplete. The drum temperature (vap stream temperature) is now specified to run it.
Close the active window. The drum temperature is now initiated. It could be changed by the Adjust function to control the bottom flow rate. Drag the adjust function from the object pallet to the PFD.
104 Process Simulation using HYSYS
Use the spreadsheet to define the new variable being the ratio of liquid stream to feed stream.
Double click on spreadsheet and import the flowrate variables from the flowsheet.
Tutorial 1 Physical Properties 105
Click on the spreadsheet button and create a new variable (liquid_to_feed_ratio) and calculate its value (the formula used in cell B4 is the ratio).
Close the active window and double click on Adjust. Specify the drum temperature (vap stream) as the adjusted variable and the value calculated in spreadsheet as the target value. Then click on start.
106 Process Simulation using HYSYS
The calculation is now completed.
Click on the Monitor button to view the Adjusted temperature.
Tutorial 1 Physical Properties 107
Problem 4: Plot the physical and thermodynamic properties Plot vapor pressure and surface tension of dimethylsulphide as a function of temperature in a desired range.
108 Process Simulation using HYSYS
Solution: Follow the step-by-step instructions to solve the problem. 1- Open a new case.
2- Add a new component list.
Tutorial 1 Physical Properties 109
110 Process Simulation using HYSYS
3- Select components from components list.
5- Select the Fluid Package (Make sure selecting Component List -1in the component list).
4- The cross button is not seen on the figure and you could move the active window to see the cross button in order to close it.
6- Add a new Fluid Package.
Tutorial 1 Physical Properties 111
7- Select Peng Robinson equation of state from Property Package.
8- Close the Fluid Package by clicking on cross button. Enter to Simulation Environment.
112 Process Simulation using HYSYS
9- Drag a material stream to the PFD and Rename it to “Feed”. Enter temperature, pressure and molar flow in the Worksheet/Conditions page.
10- In Worksheet Compositions page, enter mole fraction of the components. The stream is now calculated for a base case.
Tutorial 1 Physical Properties 113
11- Save the simulation work (e.g., problem-4).
12- To plot the surface tension of dimethylsulfide vs. temperature, go to Tools/Databook or press Ctrl-D.
114 Process Simulation using HYSYS
13- The first page of the Databook is variables.
14- Click on Insert button to sample and add the variables from the flowsheet. Herein, temperature of feed stream is sampled from the variable navigator.
Tutorial 1 Physical Properties 115
15- Also, insert the surface tension of the Feed stream.
16- Go to case studies page and add a new case study. Select the temperature as an independent variable and the surface tension as the dependent variable.
116 Process Simulation using HYSYS
17- Go to the view page and enter low, high bounds and step size values for independent variables (e.g., -250, 50 and 20).
18- Click on start button. Then go to the Results page to view the results. The results are shown both in the graph and table format.
Tutorial 1 Physical Properties 117
19- To plot the vapor pressure of dimethylsulfide vs. temperature, drag the spreadsheet function to PFD.
118 Process Simulation using HYSYS
21- Use the Antoine vapor pressure expression where 6 coefficients from a-f are needed as extracted from the scope navigator (Basis).
22- The coefficients are now imported to the spreadsheet. Press spreadsheet button in order to enter the equations.
20- Click on spreadsheet, press add import button to import the vapor pressure equation coefficients (10 coefficients) from the navigator scope Basis.
Tutorial 1 Physical Properties 119
120 Process Simulation using HYSYS
23- Enter the equations in the spreadsheet to complete the calculation. In cell B9, the temperature is calculated in K.
25- Go to Tools/databook or press Ctrl-D.
24- By clicking on the Formula button, all equations used in the spreadsheet are shown.
26- The first page of Databook is variables.
Tutorial 1 Physical Properties 121
27- Click on Insert button to sample and add the variables. Herein, the vapor pressure of methylsulfide is sampled from the Spreadsheet object.
122 Process Simulation using HYSYS
29- Go to Case Studies page and add a new case study. Select the temperature as an independent variable and the vapor pressure as the dependent variable.
30- Go to the view page and enter low, high bounds and step size values for independent variables (e.g., 0, 250 and 12.5). 28- Press OK. The variable is now added to the Databook. Click on Case Studies.
Tutorial 1 Physical Properties 123
31- Click on the Start button. After the completion of simulation, go to the Results page to view the results. The results are shown both in the Graph and Table format.
124 Process Simulation using HYSYS
Section II: Tutorials
Solution: Follow the step-by-step instructions to solve the problem. 1- Open a new case.
Tutorial 1 Physical Properties
2- Add a new component list Problem 1: Physical Properties of Water Calculate the properties of a stream of water at 25 ºC and 1 atm with mass flow rate of 125 kg/hr.
Tutorial 1 Physical Properties 67
68 Process Simulation using HYSYS
3- Select water from the Components list and then close the active window by clicking on cross button.
5- Select the Fluid Package (Make sure selecting Component List -1in the component list).
4- The cross button is not seen on the figure and you could move the active window to see the cross button in order to close it.
6- Add a new Fluid Package
`
Tutorial 1 Physical Properties 69
7- Select the Peng Robinson or SRK equation of state from Property Package.
8- Close the Fluid Package by clicking on cross button. After this step, it is also possible to import /export the Fluid Package. Enter to Simulation Environment.
70 Process Simulation using HYSYS
9- Drag a material stream to the PFD. (Choose the stream from the Object Palette by pressing F4 or by F11). Rename the stream if needed.
10- Save the simulation work (e.g., problem-1).
Tutorial 1 Physical Properties 71
72 Process Simulation using HYSYS
11- For the N components stream, N+2 parameters are needed. Enter 2 out of 3 (temperature, pressure and vapor fraction) and mass flowrate in the Worksheet/Conditions page:
13- The stream properties can now be calculated (seen in the Worksheet/Properties page). Items in blue and black indicate -defined and calculated properties, respectively.
12- Enter 1 for mole fraction of water in the Worksheet/Composition page.
14- By putting the curser on the stream, the Fly-By window appears showing the main properties of the stream.
Tutorial 1 Physical Properties 73
Problem 2: T-xy diagram Plot the T-xy diagram for the binary mixture of 1-butanol and water.
74 Process Simulation using HYSYS
Solution: Follow the step-by-step instructions to solve the problem. 1- Open a new case.
2- Add a new component list
Tutorial 1 Physical Properties 75
3- Select 1-butanol and water from components list then close the active window by clicking on cross button.
4- The cross button is not seen on the figure and you could move the active window to see the cross button in order to close it.
76 Process Simulation using HYSYS
5- Select the Fluid Package (Make sure selecting Component List -1in the component list).
6- Add a new Fluid Package.
Tutorial 1 Physical Properties 77
78 Process Simulation using HYSYS
7- Select the UNIQUAC activity model from Property Package.
9- Drag a material stream to the PFD. (Choose the stream from the Object Palette by pressing F4 or by F11). Rename the stream to H2O.
8- Close the Fluid Package by clicking on cross button. After this step, it is possible to import/export the Fluid Package. You may now enter to Simulation Environment.
10- Save the simulation work (e.g., problem-2).
Tutorial 1 Physical Properties 79
80 Process Simulation using HYSYS
11- Select another material stream for 1-butanol. Define both streams (100 °C and 1 atm) as outlined in the previous problem.
13- Use the set function from the Object Palette to keep the total molar flow of these streams equal to 1. In this way, independent mole fraction variables could be defined for mixture.
12- Enter the molar flow rate for water stream (e.g., 0.7 kmole/hr) and its composition (mole fraction=1) in order to fully define this stream. Enter the composition of 1-butanol stream (mole fraction=1).
14- Double click on the set icon to define the target variable (1-butanol molar flow).
Tutorial 1 Physical Properties 81
15- Choose H2O as a source stream.
16- Click on the parameters section to define the multiplier and offset in order to keep the total molar flow rate of these streams equal to 1. The molar flow rate of the second stream is adjusted so that the total molar flow rates of these two streams remain constant.
82 Process Simulation using HYSYS
17- There are different ways to keep the total molar flow rate of these streams constant instead of using set. For example, use a mixer (from the object pallet) and set the molar flow rate of outlet stream to 1 kmole/hr. The flow rate of 1-butanol stream is adjusted accordingly.
18- Connect the inlet and outlet streams by double clicking on the Mixer. (The stream properties can now be calculated).
Tutorial 1 Physical Properties 83
19- In order to plot the T-xy diagram, the bubble and dew point should be calculated for the water stream flowrate varying from 0 to 1. A Heater and a Cooler are added to the flow sheet for this purpose.
20- Assume no pressure drop in the Heater and the Cooler (Constant pressure for T-xy).
84 Process Simulation using HYSYS
21- To calculate the bubble and dew point for a given flowrate of water stream (0.7 kmole/hr), set the vapor fraction at the exit of the Heater and Cooler equal to zero and one, respectively.
22- To plot the figure, press Ctrl+D to open Databook.
Tutorial 1 Physical Properties 85
23- Click on insert button in order to sample the variables from the flowsheet.
24- Sample the variables from the flowsheet (temperature for S-bubble stream, S-dew stream and flowrate of water stream).
86 Process Simulation using HYSYS
25- Go to case studies and add a new case.
26- Choose the molar flow as an independent variable (to represent x in T-xy) and the temperatures as dependent variables (to represent T in T-xy) and then press view.
Tutorial 1 Physical Properties 87
27- Specify the low, high bound and step size values of independent variable and press start.
28- After the completion of simulation, press Results button to view the T-xy diagram.
. Different thermodynamic models may be selected to generate T-xy diagram and to compare the simulation data with the experimental data to figure out the proper physical property models to be employed in simulation.
88 Process Simulation using HYSYS
Problem 3 Flash Calculations Consider a stream of gas (T=40 ºC and P=30 kg/cm2) containing methane, ethane, propane, n-butane and n-pentane with molar flow rates of 60, 25, 15, 10 and 10 kmole/hr, respectively. Calculate: a) Pressure of dew point at 40 ºC. b) Pressure of bubble point at 40 ºC. c) Temperature of dew point at 30 kg/cm2. d) Temperature of bubble point at 30 kg/cm2. e) Stream enters to a separator. Calculate properties of outlet streams. f) Plot outlet molar flow rate of ethane in the gas stream as a function of the operating temperature (sensitivity analysis). g) Adjust the drum temperature to reach 50% liquid.
Tutorial 1 Physical Properties 89
Solution:
90 Process Simulation using HYSYS
3- Select components from components list, then close the active window.
Follow the step-by-step instructions to solve the problem. 1- Open a new case.
4- The cross button is not seen on the figure and you could move the active window to see the cross button in order to close it. 2- Add a new component list
Tutorial 1 Physical Properties 91
5- Select the Fluid Package (Make sure selecting Component List -1in the component list).
6- Add a new Fluid Package.
92 Process Simulation using HYSYS
7- Select the Peng Robinson equation of state from Property Package.
8- Close the Fluid Package by clicking on cross button. After this step, it is possible to import/export the Fluid Package. You may now enter to Simulation Environment.
Tutorial 1 Physical Properties 93
9- Drag a material stream to the PFD and enter two out of three properties (temperature, pressure and vapor fraction) in the Worksheet/Conditions page.
10- Save the simulation work (e.g., problem-3).
94 Process Simulation using HYSYS
11- Enter molar flow rate of components in the Worksheet/Composition page.
8- By pressing OK button, the properties of stream will be calculated.
Tutorial 1 Physical Properties 95
96 Process Simulation using HYSYS
a) For calculating the dew point pressure at 40 ºC, first erase the pressure of the stream. Then enter 1 in vapor/phase fraction of stream. (Pressure of dew point is 1105.5 kPa).
c) For calculating the temperature of dew point, erase the temperature, and then enter 30 kg/cm2 for pressure and 1 for vapor fraction. The dew point temperature is 68.092 ºC.
b) For calculating the bubble point pressure at 40 ºC, enter 0 in vapor/phase fraction of stream. Pressure of bubble point is 10775 kPa.
d) For calculating the temperature of bubble point at 30 kg/cm2, enter 0 for vapor/phase fraction of stream. Temperature of bubble point is calculated to be -73.314 ºC.
Tutorial 1 Physical Properties 97
98 Process Simulation using HYSYS
e) Return the stream conditions (temperature and pressure) to initial conditions (40 ºC and 30 kg/cm2). Then put a separator on the PFD from the Object Palette (F4).
The properties of streams are seen in the Worksheet/Conditions page.
Double click on the separator to open it. Enter inlet and outlet vapor and liquid streams on the Design/Connections page. The calculation is performed for an adiabatic separator immediately.
f) To complete a sensitivity analysis, go to Tools/Databook or press Ctrl+D.
Tutorial 1 Physical Properties 99
100 Process Simulation using HYSYS
At the first page of Databook, variables appear, use insert to sample variables from flowsheet.
Select molar flow rate of ethane from the vapor outlet stream (stream vap).
From the variable navigator, select the object and variable, e.g., choose 1 as object and its temperature as variable, press add button to select another variable.
Then go to the Case Studies page and add a new case study by clicking on the Add button.
Tutorial 1 Physical Properties 101
Specify temperature as an independent and molar flow rate of ethane as a dependent variable.
Click on the view button and enter low, high bonds and step size values for the independent variable. Number of states will be calculated by HYSYS.
102 Process Simulation using HYSYS
Press Start button and then go to the Results page to see the plot or table. The results may be exported to any spreadsheet software for further processing.
g) In order to adjust the drum temperature to reach the 50% liquid, the duty should be specified for drum to be able to run it isothermally.
Tutorial 1 Physical Properties 103
At this stage, the specifications for the drum are incomplete. The drum temperature (vap stream temperature) is now specified to run it.
Close the active window. The drum temperature is now initiated. It could be changed by the Adjust function to control the bottom flow rate. Drag the adjust function from the object pallet to the PFD.
104 Process Simulation using HYSYS
Use the spreadsheet to define the new variable being the ratio of liquid stream to feed stream.
Double click on spreadsheet and import the flowrate variables from the flowsheet.
Tutorial 1 Physical Properties 105
Click on the spreadsheet button and create a new variable (liquid_to_feed_ratio) and calculate its value (the formula used in cell B4 is the ratio).
Close the active window and double click on Adjust. Specify the drum temperature (vap stream) as the adjusted variable and the value calculated in spreadsheet as the target value. Then click on start.
106 Process Simulation using HYSYS
The calculation is now completed.
Click on the Monitor button to view the Adjusted temperature.
Tutorial 1 Physical Properties 107
Problem 4: Plot the physical and thermodynamic properties Plot vapor pressure and surface tension of dimethylsulphide as a function of temperature in a desired range.
108 Process Simulation using HYSYS
Solution: Follow the step-by-step instructions to solve the problem. 1- Open a new case.
2- Add a new component list.
Tutorial 1 Physical Properties 109
110 Process Simulation using HYSYS
3- Select components from components list.
5- Select the Fluid Package (Make sure selecting Component List -1in the component list).
4- The cross button is not seen on the figure and you could move the active window to see the cross button in order to close it.
6- Add a new Fluid Package.
Tutorial 1 Physical Properties 111
7- Select Peng Robinson equation of state from Property Package.
8- Close the Fluid Package by clicking on cross button. Enter to Simulation Environment.
112 Process Simulation using HYSYS
9- Drag a material stream to the PFD and Rename it to “Feed”. Enter temperature, pressure and molar flow in the Worksheet/Conditions page.
10- In Worksheet Compositions page, enter mole fraction of the components. The stream is now calculated for a base case.
Tutorial 1 Physical Properties 113
11- Save the simulation work (e.g., problem-4).
12- To plot the surface tension of dimethylsulfide vs. temperature, go to Tools/Databook or press Ctrl-D.
114 Process Simulation using HYSYS
13- The first page of the Databook is variables.
14- Click on Insert button to sample and add the variables from the flowsheet. Herein, temperature of feed stream is sampled from the variable navigator.
Tutorial 1 Physical Properties 115
15- Also, insert the surface tension of the Feed stream.
16- Go to case studies page and add a new case study. Select the temperature as an independent variable and the surface tension as the dependent variable.
116 Process Simulation using HYSYS
17- Go to the view page and enter low, high bounds and step size values for independent variables (e.g., -250, 50 and 20).
18- Click on start button. Then go to the Results page to view the results. The results are shown both in the graph and table format.
Tutorial 1 Physical Properties 117
19- To plot the vapor pressure of dimethylsulfide vs. temperature, drag the spreadsheet function to PFD.
118 Process Simulation using HYSYS
21- Use the Antoine vapor pressure expression where 6 coefficients from a-f are needed as extracted from the scope navigator (Basis).
22- The coefficients are now imported to the spreadsheet. Press spreadsheet button in order to enter the equations.
20- Click on spreadsheet, press add import button to import the vapor pressure equation coefficients (10 coefficients) from the navigator scope Basis.
Tutorial 1 Physical Properties 119
120 Process Simulation using HYSYS
23- Enter the equations in the spreadsheet to complete the calculation. In cell B9, the temperature is calculated in K.
25- Go to Tools/databook or press Ctrl-D.
24- By clicking on the Formula button, all equations used in the spreadsheet are shown.
26- The first page of Databook is variables.
Tutorial 1 Physical Properties 121
27- Click on Insert button to sample and add the variables. Herein, the vapor pressure of methylsulfide is sampled from the Spreadsheet object.
122 Process Simulation using HYSYS
29- Go to Case Studies page and add a new case study. Select the temperature as an independent variable and the vapor pressure as the dependent variable.
30- Go to the view page and enter low, high bounds and step size values for independent variables (e.g., 0, 250 and 12.5). 28- Press OK. The variable is now added to the Databook. Click on Case Studies.
Tutorial 1 Physical Properties 123
31- Click on the Start button. After the completion of simulation, go to the Results page to view the results. The results are shown both in the Graph and Table format.
124 Process Simulation using HYSYS
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