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How to raise chilled water temperature differentials.

Author(s) : FIORINO D. P.

Summary

This article recommends practical methods for achieving high, i.e. 8.3 °C or greater, chilled water temperature differentials (delta-Ts) in new and existing variable flow hydronic cooling systems. Once high chilled water delta-Ts are realized, more Btu's of cooling will be accomplished per litre of chilled water distributed. Pressure losses and pumping energy will decline considerably in existing hydronic cooling systems, and smaller pumps and piping may be installed in new hydronic cooling systems. Also, water chillers will no longer be limited to maximum evaporator flow rates, and chilled water storage tanks will store many more ton-h of cooling. This fundamental approach provides significant, enduring improvements in the performance of variable-flow hydronic cooling systems.

Details

  • Original title: How to raise chilled water temperature differentials.
  • Record ID : 2003-1513
  • Languages: English
  • Source: ASHRAE Transactions. 2002 Winter Meeting, Atlantic City, New Jersey. Volume 108, part 1 + CD-ROM.
  • Publication date: 2002/01/12
  • Document available for consultation in the library of the IIR headquarters only.

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