4 replies to this topic

[krishnnaa26]

Dear All

 

I am from metallurgy background. How to calculate the water dewpoint and hydrocarbon-condensate dew point of natural gas mixtures, from heat and mass balance of a natural gas processing plant that includes separation, gas sweetening, dehydration, compressor etc., units. 

 

Thanking you

Krishna

[Pilesar]

There are complicated equations to calculate dew points. The easiest way is to use a computer simulator such as Pro/II, AspenPlus, or Hysys.

[breizh]

Hi,

Try AI or your favorite search engine to get your answer.

I've added a spreadsheet I wrote years ago .

Breizh

Attached Files

•  Bubble & Dew points calculation.xlsx   17.29KB   10 downloads

[Pilesar]

From just the heat and mass balance, you can often determine the combined dewpoint at each separation stage. Where a mixed phase stream is split between vapor and liquid using a flash algorithm, the vapor is calculated to be at the dewpoint temperature at the stream pressure according to definition. For example, the top vapor stream of a distillation column is at the dew point at that pressure. There can be exceptions depending on how the simulation was configured. The result depends on the thermodynamic method used, so you may not match the official heat and material balance unless you use the same calculation method. It would be an easy exercise to add dewpoints to the heat and material balance output using the original computer simulation. If reasonable to do so, consider asking the engineer who developed the heat and material balance output to add the additional properties you want.

[Alpe]

you can solve heat and mass balance, separators, columns, hydrocarbon dew point, water dew point (flash with specified fraction and component) etc. in Excel, Python, Matlab, OpenOffice etc. with a thermo library as Prode Properties (see prode.com) ,

just my 2 cents