[Dsg-rich] [EXTERNAL] Re: RICH compressor after maintenance

[Tyler Lemon]

Hi Bob, Calvin, and Marco,

RICH compressor 2 worked fine over night so we switched back to compressor 1 this morning.

We saw that the pressure wasn’t being maintained in the buffer tank with compressor 1.

Aaron, Pablo, and I went down to shut off all compressors as requested , but before doing so, wanted to do one last test to see if the compressor could get just the buffer tank (with flow to RICH stopped) up to the pressure where the compressor shuts itself off.

When the compressor got up to ~106 psi according to its display screen, we heard a squealing sound come from inside the compressor so we hit its emergency stop button to shut it off.

Compressor 1’s inability to keep pressure in the buffer tank combined with that squealing sound to me definitely points to something wrong with the compressor.

We’re not sure where to go from here with Compressor 1, if there is something we can do at JLab or if we’d have to call Atlas Copco.

Best regards,
Tyler



________________________________
From: Dsg-rich <dsg-rich-bounces at jlab.org> on behalf of Tyler Lemon <tlemon at jlab.org>
Sent: Thursday, October 10, 2019 12:52:00 PM
To: Marco Mirazita <Marco.Mirazita at lnf.infn.it>
Cc: dsg-rich <dsg-rich at jlab.org>
Subject: Re: [Dsg-rich] [EXTERNAL] Re: RICH compressor after maintenance

Hello,

It seems like there are still issues with Compressor 1. It is not behaving the same as Compressor 2 (see attached plot).

When we go turn it off shortly, we'll see if there is anything obvious (like another leak) causing the pressure to not be maintained.

Best regards,
Tyler
________________________________
From: Dsg-rich <dsg-rich-bounces at jlab.org> on behalf of Tyler Lemon <tlemon at jlab.org>
Sent: Thursday, October 10, 2019 10:39 AM
To: Marco Mirazita <Marco.Mirazita at lnf.infn.it>
Cc: dsg-rich <dsg-rich at jlab.org>
Subject: Re: [Dsg-rich] [EXTERNAL] Re: RICH compressor after maintenance

Hi Marco,

We've swapped to Compressor 1 now and we'll let it run for a few hours and then turn it off to prevent humidity from rising further.

Tyler
________________________________
From: Marco Mirazita <Marco.Mirazita at lnf.infn.it>
Sent: Thursday, October 10, 2019 9:38 AM
To: Tyler Lemon <tlemon at jlab.org>
Cc: dsg-rich <dsg-rich at jlab.org>
Subject: Re: [EXTERNAL] Re: [Dsg-rich] RICH compressor after maintenance

Perfect, thank you.
Marco


Il 2019-10-10 15:18 Tyler Lemon ha scritto:
> Hi Marco Mirazita,
>
>  We'll plan to go swap power to the compressors again this morning to
> see how Compressor 1 behaves.
>
>  If everything looks good, we'll then plan to turn off the cooling
> system this afternoon to avoid any further increase in humidity.
>
>  Also, Monday October 14 at 9:00 AM would be good for a bluejeans
> meeting with us.
>
>  Best regards,
>  Tyler
>
> -------------------------
>
> FROM: Marco Mirazita <Marco.Mirazita at lnf.infn.it>
>  SENT: Thursday, October 10, 2019 5:57 AM
>  TO: Tyler Lemon <tlemon at jlab.org>
>  CC: dsg-rich <dsg-rich at jlab.org>
>  SUBJECT: [EXTERNAL] Re: [Dsg-rich] RICH compressor after maintenance
>
> Hi Tyler,
>  I would like to have a meeting with you and the DSG to start planning
>
>  the tests to optimize the cooling system parameters.
>  I suggest we meet next Monday, October 14, at 9 am JLab time. Please
> let
>  me know if this is ok for you, then I will set up the bluejeans
>  connection.
>  Best regards,
>  Marco
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