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Thank you Doug, You have well understood the problem, and I well understood your answer, it is enough for me…

Sorry, as nobody answers me the post I wrote follow to Montemayor’s remark, I though that nobody understood it. I decided change to the compressors forum. I well noted your remark, and in the future in order to respect the forum order I won’t do dual posting anymore I apologize

In the referenced thread there is just one partial answer that not satisfies me completely for this reason I changed the forum reformulating the question, any problem?

Hello colleagues, I have a centrifugal compressors map performance: relating Polytrophic Head vs. Inlet Flow and representing the speed curves and efficiency curves. My question is: How from this curve can I obtain the curve representing this both identical compressors working in parallel...

I have a performance curve of one stage centrifugal compressor. On this curve it is represented the pressure against the volume flow rate with the different speeds and the different efficiencies. This curve is for one compressor, I can obtain the curve for both compressors working in parallel...

I am looking for calculating the overall polytropic efficiency for of two compressors in parallel. I have the performance map from the supplier for both compressors with the polytropic head depending on the flow rate; the speed and the efficiency are also represented. But for two different...

Dear colleagues, My customer ask me replace a pressure transmitter voting system 2 out of 3 for a single transmitter SIL 2, I do not agree because the ESD system will be more sensitive to the pipe problems, Do you have more reasons?, or do you agree with my customer?… Regards, Rafcu

Dear Sirs, Can anybody supply a web link, or send me a manual where I can find the following issues related to oil products storage tanks: Design philosophy Operating philosophy Safety philosophy Environmental philosophy Thanks,

Michael99, I have the same problem, but, too late, a vent pipe is already damaged, the pipe was in CS: design temperature -20°C. The customer does not accept the HYSYS results, as the effect consider for the FO blowdown is just JT, (isenthalpic), and there is lower temperatures as kinetic...

Thanks for your support, 25362, My fax number: +33 2 40 91 06 19 attentions to: Process Engineer Exactly my problem is that my customer wants estimate the lowest temperature downstream and upstream orifice flow, for depressurizing a natural gas line at 70 bar a till 7 bar a at the worst...

Dear Sirs, Thank you for your kind help; 25362, I found the theoretical answers in your quote, please, could you send me the complete article? Now, my concern is how calculate lowest temperature in the vena-contracta Regards

Dear Sirs, I wonder if the JT effect that occurs in the orifice plate to depressurize natural gas from a pressure of 70 bar a is enough to calculate the gas lowest temperature at downstream orifice flow. My concern come from the fact that the JT effect does not consider the kinematics energy...

Dear Sirs, We are currently working on the dynamic depressurization utility of Hysys, in detail we are simulating a natural gas pipe depressurization using the General (Choked Flow) valve equation, and specifying the Av coefficient, which is the orifice area (leak area) for simulating the...

Hi guys, Anybody know what is the process fundamental of the bacteriological water treatment? Please, could you sent any links about process description and process flow diagrams, regards

Hello Guys, I’m working on a new project where there are 6 equal turbo compressors in parallel to compress natural gas. My problem is that the customer wants install a sophisticate Load Sharing Control (LSC) to control individual inlet flow compressor via the driver operating limits and working...

Hello Guys, I’m working on a new project where there are 6 turbo compressors in parallel, my problem is that the customer wants install a sophisticate Load Sharing Control (LSC) controlling driving operating limits in cascade with the inlet for each compressor via the compressor speed, the...