Variable Water Flow Pumping for Central Chilled Water Systems

[+] Author and Article Information
M. Liu

Architectural Engineering, University of Nebraska, 1110 South 67th Street, Omaha, NE 68182-0681e-mail: mliu2@unl.edu

J. Sol. Energy Eng 124(3), 300-304 (Aug 01, 2002) (5 pages) doi:10.1115/1.1488667 History: Received June 01, 2001; Revised March 01, 2002; Online August 01, 2002
Copyright © 2002 by ASME
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Schematic of the primary secondary chilled water pumping systems
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Schematic of variable water flow (VW) systems (Push through is recommended for new system designs. Draw through is recommended for existing system retrofits.)
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Simulated pump energy savings ratio versus the water flow ratio (Assuming three identical chiller systems)
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Simulated Reynolds Number and ratio of the in-tube convective heat transfer coefficient (Solid line is for the ratio of the convective heat transfer coefficient. The dash line is for Reynolds number)
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Simulated ratio of overall heat transfer coefficient for different design overall heat transfer coefficients
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Simulated ratio of the heat transfer temperature difference to its design value
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Simulated evaporative temperature under different approaching temperature difference (εd) (Dashed line is for the VW system. Solid line is for the PS systems.)




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