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    coolpj Posts: 23, Reputation: 1
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    #1

    Jun 5, 2008, 08:50 AM
    Circulating Pumps - submersible pumps - low efficiency
    Hello people,

    Well I was selecting some hot water circulating pumps and submersible pumps, for a rather big project.

    I consulted GRUNDFOS (can't get bigger than that).

    For the hot water circulating pumps, Grundfos informed me that the best selection according to my (flow, head) requirements was a pump with a generally low efficiency curve:
    Efficiency at working point: 31.6 %
    Maximum effiency of the pump curve : 32.7%.

    Is this selection considered acceptable? Any thoughts?

    As for the submersible pumps, since my flow requirements is low (15.8 gpm at 6 meters head, 8.7 psi), the efficiency of the selected pump kept appearing flow on the software.
    Any thoughts?

    Thanks !

    Paul
    coolpj's Avatar
    coolpj Posts: 23, Reputation: 1
    New Member
    		  
    #2

    Jun 5, 2008, 08:52 AM
    Correction:
    As for the submersible pumps, since my flow requirements is low (15.8 gpm at 6 meters head, 8.7 psi), the efficiency of the selected pump kept appearing low on the software.
    Any thoughts?
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