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Performance of a volumetric method for measuring state of charge for ice storage systems.

Author(s) : WEST J. D., BRAUN J. E.

Summary

The baseline for the evaluation was an energy balance method that is highly accurate but prohibitively expensive for commercial use. The volumetric method of determining state of charge tends to overestimate the "true" state of charge during discharge because it does not account for sensible heating of water trapped between the ice and heat transfer tubes. This sensible effect can lead to errors of up to 8% at the end of tank discharge when it is most important to have an accurate indication of state of charge. A correction factor was developed. The correction factor is particularly important for high discharge rates that may occur in conjunction with the use of real-time pricing of electricity.

Details

  • Original title: Performance of a volumetric method for measuring state of charge for ice storage systems.
  • Record ID : 2001-1981
  • Languages: English
  • Source: ASHRAE Transactions. 1999 Annual Meeting, Seattle, Washington + CD-ROM.
  • Publication date: 1999
  • Document available for consultation in the library of the IIR headquarters only.

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