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  • Users: hhjlep
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  1. hhjlep

    ASHRAE Duct Fitting Database download

    I'm desparate to get hold of the ASHRAE Duct Fitting Database. I live in South Africa, and do not have enough time to wait for the shipping and postal service. Is there anywhere on the internet where I can purchase / download / view this document in .PDF or similar? It is only available on CD...
  2. hhjlep

    Refrigerant piping length

    I am new to HVAC design and need help on the following issue: I have specified a number of house hold Split Units for an office complex. The split units are relatively small, most of them providing 3.2 kW of cooling. I need to run the piping for 25 - 30m, as the only available space for the...
  3. hhjlep

    centrifugal pump efficiency

    I need to estimate an efficiency of a centrifugal pump, but do not have any specifications. This is what I know: Single stage centrifugal pump Static head: 100m Motor power: 200 kW Water quality: Poor. Water is pumped from the bottom of a gold mine. It is not slurry, but it does...
  4. hhjlep

    centrifugal compressor efficiency

    I need to calculate the energy use of a large centrifugal compressor installation at a gold mine. I do not have any curves, nor can I make any measurements. I have the following specs: Inlet pressure: 85 kPa Outlet pressure: 550 kPa # of stages: 4 mass flow: 25 kg/s Inlet temp: 18 C...

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