Transcription of Trane Engineers Newsletter, vol 31-4
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Trane Engineers Newsletter, vol 31-4
Engineers newsletter providing insights for today's hvac system designer the saga continues . Variable-Primary-Flow Systems Revisited from the editor Perhaps this explains the increased pressure drops and efficiency of the Obtaining reliable, cost-effective HVAC interest in chilled water systems A VPF design displaces the performance remains a priority for with variable primary flow (VPF). small, inefficient, low-head primary building owners, facility managers, and VPF designs use fewer pumps and pumps used in primary secondary system designers alike. A 1999 fewer piping connections than primary systems. The pressure drops Engineers newsletter (volume 23, secondary systems, which means previously satisfied by the primary number 3) discussed one avenue for fewer electrical lines and a smaller pumps are instead satisfied by the achieving that goal in a chilled water footprint for the plant.
4 Trane Engineers Newsletter — Vol. 31, No. 4 2 percent per minute and would need 30 minutes to adapt to a flow-rate reduction of 50 percent. Fluctuations of
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