[Dsg-htcc] HTCC gas flow rate for KPP

[Youri Sharabian]

Hi Brian,
Tomorrow first thing in the morning we will take a closer look at pressuredynamics at flows around 6.5 as George has recommended. Correspondinglywe will consider possibility of changing high pressure alarm set point.We can not do it today since the hall is closed.Thank you very much.Best regards,                        Youri
----- Original Message -----
From: Brian Eng <beng at jlab.org>
To: dsg-htcc <dsg-htcc at jlab.org>
Sent: Mon, 23 Jan 2017 16:43:18 -0500 (EST)
Subject: Re: [Dsg-htcc] HTCC gas flow rate for KPP

Nick called and requested Marc lower the flow rate to 2 slm, which as been done.

However, it will need to be raised at some point if the detector is to be ready in time for the KPP run.

> On Jan 23, 2017, at 4:33 PM, Brian Eng <beng at jlab.org> wrote:
> 
> Based on George's recommendation I had Marc set the flow to 6.5 slm remotely.
> 
>> On Jan 23, 2017, at 2:53 PM, George Jacobs <jacobsg at jlab.org> wrote:
>> 
>> Hi Youri,
>> 
>> I recommend you increase your CO2 flow rate. The current rate of 2 slm is too low. I recommend a flow of 6.5 slm until the KPP run is completed.
>> 
>> The calculated flow rates for the HTCC are as follows;
>> Purge Flow - 20 slm - 1.5 volume exchanges per day- the detector volume will be purged in 3.4 days
>> Running Flow - 6.5 slm - 0.5 volume exchanges per day 
>> Reduced Flow - 3.25 slm - 0.25 volume exchanges per day
>> 
>> George

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