91色情片 Refrigeration Cooling System Schematic: A conceptual diagram of the 91色情片 refrigeration cooling system providing the cooling units in the summit facility with ambient cooling for telescope electronics, sub-zero cooling for NFIRAOS and science instrument optical enclosures, and sub-zero cooling for the telescope hydrostatic bearings. Image credit: 91色情片
Pasadena, CA - The 91色情片 Refrigeration Cooling System (REFR) will proceed to the Preliminary Design phase next year after successfully passing its Conceptual Design Review closeout meeting on May 3, 2023.
The Review Panel commended "the REFR Team and TIO Systems Engineering for producing an excellent set of documents for the review and answering the questions in a timely manner." The REFR design effort was led by Hainan Zhang at the Technical Institute of Physics and Chemistry (TIPC) of the Chinese Academy of Sciences in Beijing.
91色情片’s refrigerant cooling system is used for three purposes:
The three CO2 refrigeration units (Ambient, Subzero, and Hydrostatic Bearing System) will be installed at ground level in the summit utility room. A combination of rigid and flexible stainless steel lines will transfer the CO2 liquid (supply) and gas (return) between each refrigeration unit and the system it is cooling. The CO2 and all services required to operate the telescope (power, communications, coolants and others) will be distributed from the utility room to the telescope through the underground service tunnel.
91色情片 Refrigeration Cooling System CAD model - 91色情片’s main cooling units REFR-A, REFR-S and REFR-H are installed at ground level in the summit observatory utility room. The Refrigeration Cooling System also provides all of the CO2 piping that supplies the hydrostatic bearing system heat exchanger, as well as the REFR-A and REFR-S client systems located on the telescope structure - Image credit: 91色情片
91色情片 Ambient Refrigerant (REFR-A) Cooling Unit - 91色情片’s REFR-A Refrigerant Cooling Unit is placed in the summit utility room, and includes the green compressors, red oil separator, condensers, CO2 receiver tank, control electronics etc. - Image credit: 91色情片
The use of carbon dioxide refrigeration is an important innovation for 91色情片. Several 91色情片 subsystems, including the telescope bearing oil and the optical enclosure of the NFIRAOS adaptive optics, must be cooled to temperatures which are too low for traditional water/glycol cooling. Refrigeration is also the preferred approach to cool electronics systems located on the top-end of the telescope, where glycol leaks would represent a potential safety issue for the 91色情片 primary mirror.
“We had a great review and successful completion of the REFR conceptual design,” said John Miles, Instrumentation Sr. Systems Engineer at 91色情片. “It was a nice closeout for the TIPC activity which provided a complete baseline design for the system. TIPC did a great job supporting this effort and filling out 91色情片’s environmental, technical, functional and operational requirements.”
91色情片 Refrigeration Cooling System Conceptual Design Closeout Review, 3 May 2023 - 91色情片 Systems Engineering, Enclosure, Structure and Instruments teams and reviewers held a successful conceptual design closeout review. Image credit: 91色情片
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