Selection of Cold Compressors for the Fermilab Tevatron

Fuerst, J. D.

doi:10.1007/978-1-4615-2522-6_104

Cited by 8 publications

(2 citation statements)

References 2 publications

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“…The operational experience of twenty-four compressors in the Tevatron showed that the average compressor adiabatic efficiency was lower than the prototype machine [6]. This was suspected to be due to pressure drop across the compressor's inlet bayonet.…”

Section: Test Resultsmentioning

confidence: 99%

Pressure Field Study of the Tevatron Cold Compressors

Klebaner¹,

Martinez²,

Soyars³

et al. 2004

AIP Conference Proceedings

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The Fermilab Tevatron cryogenic system utilizes high-speed centrifugal cold compressors, manufactured by Ishikawajima-Harima Heavy Industries Co. Ltd. (IHI), for high-energy operations [1]. The compressor is designed to pump 60 g/sec of 3.6 K saturated helium vapor at a pressure ratio of 2.8, with an off-design range of 40 to 70 g/sec. Operating speeds are between 40 and 95 krpm, with a speed of 80 krpm at the design point. Different heat loads and magnet quench performance of each of the twenty-four satellite refrigerators dictates different process pressure and flow rates of the cold compressors. Reducing the process flow rate can cause the centrifugal cold compressor to stop pumping and subsequently surge. Tests have been conducted at the Cryogenic Test Facility at Fermilab to map the pressure field and appropriate efficiency of the IHI hydrodynamic cold compressor. The information allows tuning of each of the twenty-four Tevatron satellite refrigerators to avoid cold compressor operation near the surge and choke lines. A new impeller has also been tested. The Tevatron cold compressor pressure field and efficiency data with the new impeller are presented in this paper.

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Section: Test Resultsmentioning

confidence: 99%

Pressure Field Study of the Tevatron Cold Compressors

Klebaner¹,

Martinez²,

Soyars³

et al. 2004

AIP Conference Proceedings

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show abstract

“…Early systems that operated without cold compressors were limited in low temperature capacity by this pressure drop. The cold compressors shown in Figure 7 are assumed to be about 65 percent efficient, large size cold compressors may be somewhat more efficient [5]. The use of cold compressors does not significantly improve the overall efficiency of the cycle, but they do reduce the capital cost of the cold box and warm compressor system.…”

Section: The 19 K Helium Cold Box Warm Compressors and Cold Compresmentioning

confidence: 99%

The refrigeration and cryogenic distribution system for the shortpulse x-ray source

Green¹,

Corlett²

2002

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The Refrigeration and Cryogenic Distribution SystemThis report describes the essential elements of the cryogenic system. The cryogenic distribution system starts at the level of the linac superconducting RF cavities [1] and moves out through the cryogenic piping to the liquid helium refrigeration plant that will be used to cool the RF cavities and the undulator magnets. For this report, the cryogenic distribution system and cryogenic refrigerator includes the following elements:1) The piping within the linac cryogenic modules will influence the heat transfer through the super-fluid helium from the outer surface of the TESLA niobium cavity and the liquid to gas interface within the horizontal header pipe where the superfluid helium boils. This piping determines the final design of the linac cryogenic module.2) The acceptable pressure drops determine the supply and return piping dimensions.3) The helium distribution system is determined by the need to cool down and warm up the various elements in the light source.4) The size of the cryogenic plant is determined by the heat loads and the probable margin of error on those heat loads. Since the final heat loads are determined by the acceleration gradient in the cavities, a linac with five cryogenic modules will be compared to a linac with only four cryogenic modules.The design assumes that all cryogenic elements in the facility will be cooled using a common cryogenic plant. To minimize vibration effects on the beam lines, this plant is assumed to be located some distance from the synchrotron light beam lines. All of the cryogenic elements in the facility will be attached to the helium refrigeration system through cryogenic transfer lines. The largest single cryogenic load is the main linac, which consists of four or five cryogenic modules depending on the design gradient for the cavities in the linac section. The second largest heat load comes from the cryogenic

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Experience with Small Turbomachinery in a 400 Watt Refrigerator

Fuerst

1996

A Cryogenic Engineering Conference Publication

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Selection of Cold Compressors for the Fermilab Tevatron

Cited by 8 publications

References 2 publications

Pressure Field Study of the Tevatron Cold Compressors

Pressure Field Study of the Tevatron Cold Compressors

The refrigeration and cryogenic distribution system for the shortpulse x-ray source

Experience with Small Turbomachinery in a 400 Watt Refrigerator

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