TS Diagram for on-Line Monitoring of the RHIC Refrigerator
The Brookhaven National Laboratory RHIC (Relativistic Heavy Ion Collider) 25 kW helium refrigerator1 is now operating for the first time on the occasion of the first sextant test. A computer program, written in Visual Basic and running on a PC, has been developed as an on-line diagnosis tool. This piece of software overlays a theoretical and a live display of the refrigerator cycle on the Ts plane. The diagram is a graphical representation of the deviation from the theoretical state. This provides a visual feedback to refrigerator operators who can then make necessary adjustments. Any additional values of interest, such as work, efficiencies etc., are also available on the diagram or as a table summarizing performance.
KeywordsHeat Exchanger Process Point Expansion Valve Instrument Reading Visual Basic Program
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- 1.D. Brown, A. Schlafke, K. Wu, “Cycle Design for the ISABELLE Helium Refrij tor”, Advances in Cryogenic Engineering, Vol.27, Plenum Press, New York (1982).Google Scholar