4 replies to this topic

[peter317]

Hello all,

 

I'm a Junior Process Engineer facing some difficulties modeling an upstream facility, I would really appreciate it if you helped me out in the following questions:

 

1- For heating value calculation of the gas, I use GPSA tables and using excel and mole fractions of the gas, I get the heating value. Here are two questions:

     A)The data aquired from GPSA are for ideal gas and my gas is at elevated T and P, how can I correct for that?

      each time I want to calculate heating value, I go to Excel sheet since HYSYS give me "empty" for LHV and HHV, Could you explain how to link excel with HYSYS?

 

2- How can I use the gas in fueling a heater in the flowsheet (convert a material stream to energy one)?

 

Thaaaaaaaaaaanks a million in advance

 

 

[Bobby Strain]

Are you sure you looked closely at HYSYS for calculating heating values?

 

Bobby

[peter317]

Yes sir, I did. Kindly find a screenshot attached...

Attached Files

•  sc sh.jpg   103.19KB   5 downloads

[shan]

The stream HHV/LHV values disappearance problem is because there is (are) hypothetical component(s) in your considered stream.  If you define a stream the same as the considered stream and specified all the hypothetical compositions as 0, you will have the HHV/LHV values back.

[peter317]

Dear Mr. Shan,

 

Your comment is very helpful, the hypo components are almost negligible in my stream and I can just ignore them without much of a worry. I defined another stream and I got the heating value just as you advised. 

 

I used cut/blend in oil characterization to get those hypo components, why HYSYS can't get their HV? also, could you please answer the second question?

 

Thanks, your entry really helped me...