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Behavior of cellular glass insulation on a district heating and cooling pipe subjected to underground water attack.

Author(s) : CHYU M. C., ZENG X., YE L.

Summary

Cellular glass pipe insulation was tested unjacketed under flooded conditions to simulate underground water attacking an underground pipe in a district heating and cooling system. The pipe's fluid temperature was tested from 2 to 216 deg C. The surrounding water was maintained from 8 to 40 deg C to simulate the possible conduit water temperatures when the system fails. Cellular glass pipe insulation of 2-, 3- and 4-inch thicknesses was tested. The insulation demonstrated excellent moisture resistant performance when the pipe temperature was lower than the surrounding water temperature. Cracks developed in the insulation when the pipe temperature was higher than the water temperature, causing a deterioration in insulating performance.

Details

  • Original title: Behavior of cellular glass insulation on a district heating and cooling pipe subjected to underground water attack.
  • Record ID : 1999-3456
  • Languages: English
  • Source: ASHRAE Transactions. 1998 annual Meeting, Toronto, Ontario + CD-ROM.
  • Publication date: 1998
  • Document available for consultation in the library of the IIR headquarters only.

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