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Overview: https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/rtds/PR-11.pdf
List of Travelers
Number | Title and Link | Author | Date Modified |
---|---|---|---|
ATLAS CO2-100 | ATLAS CO2-100 High Pressure Decay Test.docx | Brian Qiu | 8 July 2020 |
ATLAS CO2-101 | ATLAS CO2-101 Evacuation and CO2 Filling Procedure.docx | Brian Qiu | 3 June 2020 |
ATLAS CO2-102 | ATLAS CO2-102 operation of the Julabo chiller .docx | Brian Qiu | 8 July 2020 |
ATLAS CO2-103 | ATLAS CO2-103 Startup and Shut Down of the CO2 Plant 7-9.docx | Brian Qiu | 9 July 2020 |
ATLAS CO2-104 | Brian Qiu | 18 Nov 2021 | |
ATLAS CO2-105 | CO2 Operation harzard for CO2 Plant in B33 | Zhi Zheng | 18 Nov 2021 |
ATLAS CO2-106 | CO2 operation spreadsheet | Zhi Zheng | 18 Nov 2021 |
pressure system number of 1433 | 2014 |
Manual for VFD: https://www.hitachi.us/supportingdocs/forbus/inverters/Support/WJ200_Instruction_NT325X.pdf
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The harzard of CO2 are summarized in the table as well as in the ATLAS CO2-105:
Failures | comments | unmitigated consequence | mitigation |
pressurize the CO2 plant to over 1000 psig | A pressure of higher than 1000 psig exceeds the rated pressure of some components of the CO2 plant | Leaks and release of high-pressure gases | add a pressure limit device at the pressure source, such as a PRV |
valve of CO2 cylinder is not at fully close position after filling | Leaks and release of high-pressure CO2 | ||
when connected to a vacuum pump, the CO2 plant has not vented or the pressure gauge doesn't show zero gauge pressure | Damage to the vacuum pump can occur and personnel injure can happen if this step is not followed. | Check pressure gauge and make sure it shows zero, before connected to a vacuum pump | |
run the gear pump when there is no liquid CO2 in the system | Running the gear pump without liquid can damage the gear pump due to overheating. | Operation Training. make sure the system pressure is at 800 psi before turning on the pump | |
run the chiller with a setpoint at lower than -52C for CO2 cooling | CO2 has a triple point of -56.6 C and chiller will adjust the heat transfer fluid temperature around the setpoint, in this case CO2 might become dry ice | CO2 might become dry ice and block the pipe, might cause damage on the gear pump | Operator training. |
leakage from local support ( stave or ring ) at Room Temp with 800 psi | Energy for the stave with 800 psi at RoomT is around 3.5 J (with tube length ~200 mm) and for the ring, the energy is around 16 J, the energy is very smal | small broken pieces flashing out might cause some personnel injure | wear safety glasses |