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  1. jddj

    Equivalent R- Value calculation of metal/insulation wall

    Thanks for the response, I will review my inputs and see if anything else looks off.
  2. jddj

    Equivalent R- Value calculation of metal/insulation wall

    Hello, I have a spreadsheet that calculates the equivalent R-value for parallel heat flow through wall studs and insulation. I have always used this spread sheet on typical wall sections with wood studs and batt insulation and seem to have got reasonable numbers. The equation in the spreadsheet...
  3. jddj

    Pump power calculation for non water application

    1503-44, yes that is clear thank you for the reply!
  4. jddj

    Pump power calculation for non water application

    TugboatEng & Littleinch, thanks for the reply's. maybe I miss quoted the "because the SG of 1.2 value accounts for the reduced efficiency, " but basically they were saying I do not need to use a different efficiency. So when you say " Just multiply the y-axis (head) by 1.2. The chart should...
  5. jddj

    Pump power calculation for non water application

    Hello, I'm trying to determine the power required to operate the pump at the indicated point on the pump curve. This pump is operated by a VFD. The curve shown is based off of water, the fluid I am working with has a SG of 1.2. I am using the equation Brake HP =...

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