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VARIABLE FLOW CHILLED WATER SYSTEMS.

Author(s) : KIRSHENBAUM M.

Type of article: Article

Summary

THE AUTHOR ILLUSTRATES THE BAD CONTROL CHARACTERISTICS WHEN CONSTANT SPEED PUMPS DELIVER THROUGH A SYSTEM IN WHICH LOAD CONTROL IS BY 2-PORT THROTTLING VALVESAND WITH A BYPASS FROM CHILLER OUTLET TO PUMP INLET CONTROLLED BY A DIFFERENTIAL PRESSURE VALVE. THIS SYSTEM INHERENTLY LEADS TO LACK OF STABLE CONTROL RANGE. TWO ALTERNATIVE SYSTEMS ARE SHOWN AND EXPLAINED, THE PREFERRED SYSTEM HAVING PRIMARY/SECONDARY PUMPING AND A BYPASS CONTROL AT THE FAR END OF THE MAINS. D.W.H.

Details

  • Original title: VARIABLE FLOW CHILLED WATER SYSTEMS.
  • Record ID : 1988-1150
  • Languages: English
  • Source: ASHRAE Journal - vol. 29 - n. 8
  • Publication date: 1987
  • Document available for consultation in the library of the IIR headquarters only.

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