9 replies to this topic

[MimoDec80s]

Hi
Is there any way to enter the gas Flow in hysys in Nm3/hr , normal condition ( 0°C, 1 atm ) !!

Edited by MimoDec80s, 15 May 2023 - 09:23 PM.

[Bobby Strain]

What are the conditions that are used in HYSYS SI? Check them first. If those are the conditions, you can probably enter them as such. Clone a new set of units if necessary.

 

Bobby

[Pilesar]

Nm3/hr is a molar flow rate so look under molar flow rate units.

[Nikolay_]

Hi,

 

Adding to Pilesar comment you need divide Nm3/hr to 22.4 to obtain molar flow kmol/h.

Edited by Nikolai T, 16 May 2023 - 07:12 PM.

[MimoDec80s]

Nm3/hr is a molar flow rate so look under molar flow rate units.

I am sure there is no Nm3/hr in the units available

[MimoDec80s]

Hi,

Adding to Pilesar comment you need divide Nm3/hr to 22.4 to obtain molar flow kmol/h.

I can already calculate it manually sure , but I thought there is a unit called Nm3/hr not to waste time

[SilverShaded]

 

Hi,

Adding to Pilesar comment you need divide Nm3/hr to 22.4 to obtain molar flow kmol/h.

I can already calculate it manually sure , but I thought there is a unit called Nm3/hr not to waste time

 

Pilesar is correct, you can define molar flow in Hysys to be Nm3/hr.  Either when you enter the value or by default by changing the unit set.

[Pilesar]

It is a common mistake to look for Nm3/hr when entering a volume flow rate because the units of measure look like they should be a volumetric flow rate. Enter the stream rate as molar flow and then look for Nm3/hr for the units of measure. You are not the first to have trouble with this! It is very common.

[Nikolay_]

Thank you. 

[Bobby Strain]

Pilesar,

      You assume we all know how to enter numeric values in units other than the default unit. I know, but there are probably few others.

 

Bobby