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ABNORMAL EFFECTS OF VACUUM INSULATED CRYOGENIC TANKS IN PRESTARTING OPERATION.

Author(s) : IVANOV B. A., MELYOHIN D. P., ARKHIPOVA E. V.

Summary

DETECTED ABNORMAL EFFECTS ARE ANALYZED IN HEAT-INSULATION CAVITIES OF CRYOGENIC TANKS IN PRESTARTING OPERATIONS. THE PRESENCE OF MOISTURE IN HEAT INSULATIONBEFORE EVACUATION MAY SIGNIFICANTLY INCREASE THE TIME OF CREATING A STABILIZED VACUUM IN IT. IT IS FOUND THAT THE ACCELERATION OF THE PROCESS OF CREATING STABILIZED RAREFACTION IN THE INSULATED SPACE DOES NOT NECESSARILY REQUIRE INCREASING THE POWER OF VACUUM CREATING MEANS OR VACUUM LINE CARRYING CAPACITY. ON THE CONTRARY, TO ACCELERATE THE CREATION OF STABILIZED VACUUM IN UNHEATED THERMOINSULATING CAVITIES, IT IS SOMETIMES NECESSARY TO BRING DOWN THESE CHARACTERISTICS. THIS IS CAUSED BY THE FACT THAT THERE ARE TWO OPTIMUM RATE VALUES OF CREATING STABLE VACUUM IN EVACUATED CHAMBERS WITH DROP MOISTURE. THE DURATION OF CREATING THE STABLE OPERATING RAREFACTION IN MOISTURED HEAT INSULATION OF A 3.2 M3 CRYOGENIC TANK DECREASES BY 8 TO 10 DAYS AT A LOWERED RATE OF EXHAUST.

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Details

  • Original title: ABNORMAL EFFECTS OF VACUUM INSULATED CRYOGENIC TANKS IN PRESTARTING OPERATION.
  • Record ID : 1992-1506
  • Languages: English
  • Source: New challenges in refrigeration. Proceedings of the XVIIIth International Congress of Refrigeration, August 10-17, 1991, Montreal, Quebec, Canada.
  • Publication date: 1991/08/10
  • Document available for consultation in the library of the IIR headquarters only.

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