Hai Sir... I am working in RADFRAC distillation column in aspen plus, while using dynamic mode to transfer flowsheet to aspen dynamics I am getting this error in the update pressure driven driven option, So If anyone could please help me to come out of this error, It helps a-lot to me. Thank you so much I Am getting this error: TRANSLATING BLOCK RECT of TYPE RADFRAC: WARNING: The pressure difference between feed stream 2 and stage 24 exceeds 10% of the total column pressure drop. Please check upstream valve specifications.
The specified pressure drops in the column are smaller than the liquid head on the stages listed below. Please adjust the pressure profile on the Pressure sheet of the Setup form. A typical total pressure drop across a stage is twice the pressure drop due to liquid head. Alternatively, modify the weir heights or column diameter on these stages. If you are modelling a packed column, select the Simple Packing option on the Hydraulics sheet of the Dynamics form. If you are using tray-rating or packing-rating, ensure your input parameters are consistent.
P_dropL = Pressure drop due to liquid head on stage (Bar). P_drop = Total pressure drop on stage (Bar).
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Thanks for sharing,that’s helpful
Glad it was helpful!
Can you send post link to completed aspen plus and aspen dynamic file please. I follow tutorial perfectly but I still don't get same result as you.
Hai Sir...
I am working in RADFRAC distillation column in aspen plus, while using dynamic mode to transfer flowsheet to aspen dynamics I am getting this error in the update pressure driven driven option, So If anyone could please help me to come out of this error, It helps a-lot to me.
Thank you so much
I Am getting this error:
TRANSLATING BLOCK RECT of TYPE RADFRAC:
WARNING: The pressure difference between feed stream 2 and stage 24 exceeds 10% of the total column pressure drop. Please check upstream valve specifications.
The specified pressure drops in the column are smaller than the liquid head on the stages listed below. Please adjust the pressure profile on the Pressure sheet of the Setup form. A typical total pressure drop across a stage is twice the pressure drop due to liquid head. Alternatively, modify the weir heights or column diameter on these stages. If you are modelling a packed column, select the Simple Packing option on the Hydraulics sheet of the Dynamics form. If you are using tray-rating or packing-rating, ensure your input parameters are consistent.
P_dropL = Pressure drop due to liquid head on stage (Bar).
P_drop = Total pressure drop on stage (Bar).
Stage P_dropL (Bar) P_drop (Bar)
2 8.426222326029e-003 1.099999999976e-006
3 8.426222184703e-003 1.099999999976e-006
4 8.426222043377e-003 1.099999999976e-006
5 8.426221964840e-003 1.099999999976e-006
6 8.426221885595e-003 1.099999999976e-006
7 8.426221896386e-003 1.099999999976e-006
8 8.426222046000e-003 1.099999999976e-006
9 8.426222687129e-003 1.099999999976e-006
10 8.426224437877e-003 1.100000000420e-006
11 8.426228925565e-003 1.099999999976e-006
12 8.426239939555e-003 1.099999999976e-006
13 8.426266794368e-003 1.099999999976e-006
14 8.426332020108e-003 1.099999999976e-006
15 8.426490209445e-003 1.099999999976e-006
16 8.426873439801e-003 1.099999999976e-006
17 8.427800556412e-003 1.099999999976e-006
18 8.430036252006e-003 1.099999999976e-006
19 8.435378214562e-003 1.099999999976e-006
20 8.447849268630e-003 1.099999999976e-006
21 8.475377395461e-003 1.099999999976e-006
22 8.528903170547e-003 1.099999999976e-006
23 8.608684514377e-003 1.099999999976e-006
Hello dear, change the value of the weir height.