Compressor doesn't calculate Discharge Temperature correctly [Bug] #638
Comments
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@CKapp-slrconsulting what thermo model are you using? can you zip the file and attach it here? |
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Is this what you need, Dan?
Christean Kapp
Principal Engineer -
Air Quality
M
+1 346-749 0356
E
***@***.***
SLR International Corporation
Houston,
TX,
United States
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From: Daniel Wagner ***@***.***>
Sent: Wednesday, May 8, 2024 2:38 PM
To: DanWBR/dwsim ***@***.***>
Cc: Christean Kapp ***@***.***>; Mention ***@***.***>
Subject: Re: [DanWBR/dwsim] Compressor doesn't calculate Discharge Temperature correctly [Bug] (Issue #638)
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@CKapp-slrconsulting<https://github.com/CKapp-slrconsulting> what thermo model are you using? can you zip the file and attach it here?
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Reply to this email directly, view it on GitHub<#638 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BGVGCX6KKDXQQ2JCXQX2ALDZBJ5KDAVCNFSM6AAAAABHNRYRTCVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDCMBRGI4TMMRXGU>.
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@CKapp-slrconsulting please attach the zipped flowsheet file, and do not reply directly from the email, please come to github website to attach the file. |
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The github site did not allow me to attach the flowsheet file with that extension
Christean Kapp
Principal Engineer -
Air Quality
M
+1 346-749 0356
E
***@***.***
SLR International Corporation
Houston,
TX,
United States
Confidentiality Notice and Disclaimer
This communication and any attachment(s) contain information which is confidential and may also be legally privileged. It is intended for the exclusive use of the recipient(s) to whom it is addressed. If you have received this communication in error, please e-mail us by return e-mail and then delete the e-mail from your system together with any copies of it. Any views or opinions are solely those of the author and do not represent those of SLR International Corporation, or any of its subsidiaries, unless specifically stated.
From: Daniel Wagner ***@***.***>
Sent: Monday, June 24, 2024 6:59 AM
To: DanWBR/dwsim ***@***.***>
Cc: Christean Kapp ***@***.***>; Mention ***@***.***>
Subject: Re: [DanWBR/dwsim] Compressor doesn't calculate Discharge Temperature correctly [Bug] (Issue #638)
You don't often get email from ***@***.*** Learn why this is important<https://aka.ms/LearnAboutSenderIdentification>
@CKapp-slrconsulting<https://github.com/CKapp-slrconsulting> please attach the zipped flowsheet file, and do not reply directly from the email, please come to github website to attach the file.
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Reply to this email directly, view it on GitHub<#638 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BGVGCXYYGIXJA5KYD36TOBLZJACXTAVCNFSM6AAAAABHNRYRTCVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDCOBWGQYDMMZVGQ>.
You are receiving this because you were mentioned.Message ID: ***@***.***>
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@CKapp-slrconsulting you need to zip the simulation file |
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Chiller.zip |
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@CKapp-slrconsulting the attached flowsheet doesn't have a compressor named C-NGL |
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@CKapp-slrconsulting the suction state is all liquid, and the energy stream is negative in the compressor. Something is wrong. However if you change the equation of state to pure Peng-Robinson the results look sane. I don't know why Lee-Kessler causes problems in the compressor calc (which effectively should be equal to a pump calc for liquid fluid). |
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@DanWBR check-out the attached file. It shows the problem with discharge temperature for liquid propane for PR/LK vs PR |
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Many Thanks Dan for your detective work |
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**Describe the bug
I am calculating a simple propane (100%) compressor going from -38F 13 PSIG to 146 PSIG and the discharge temperature wants to be lower than the suction temperature, the E3 horsepower surprisingly seems right, the power numbers for suction and discharge seem to be wrong or misleading. see attachment-
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To Reproduce
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