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  • Users: flamearrow
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  1. flamearrow

    Micro Irrigation Pump flow rate

    Hi I got a automatic micro irrigation system with different zones containing sprinkler, dripper and bubbler which are designed to operate at different time. How could I determine the flow rate of the pump? Thank you
  2. flamearrow

    Hi Gentlemen Could anybody provi

    Hi Gentlemen Could anybody provide me guidelines/procedure of testing and commissioning of MBR? at least the main components
  3. flamearrow

    Residential range hood-high rise building

    Hi Guys, We have 28 kitchens in a 7 storey apartment connected to 2 no of roof top exhaust fan. designed CFM for a kitchen is 80. when I checked with suppliers of range hood, I could not find hood having pressure loss data.most of the hoods are more than 200 CFM, which I think too high...
  4. flamearrow

    Calculating room pressure

    Hi Guys, Is there any method to calculate the room pressure from CFM and other available parameters without measuring from devices? thanks
  5. flamearrow

    Pressure gauge reading

    Hi any Savvy, Would anyone explain to me what the pressure gauge in the fluid pipe reads (either analog or digital), I mean static or total pressure? I found from some web sources that it reads only static and we need to add the velocity pressure. Thanks
  6. flamearrow

    Hi How to determine the return a

    Hi How to determine the return air flow rate and exhaust air flow rate of AHU? OA & supply air shall be calculated. all I know return has to be same as supply and OA shall be subtracted, but I found in other designs that return is taken 2-10% less the the supply rate ,can anyone please tell...
  7. flamearrow

    Hi CARRIER HAP load calculatio

    Hi CARRIER HAP load calculation shows different heat load for a same roof/wall with same U value but different thickness. Logically more the thickness greater the heat/cooling load but by the equation of heat transfer for wall/roofs it only depends on the area, U and temp.difference could...
  8. flamearrow

    Cavitation in suction lift centrifugal pumps

    Hi, To avoid cavitation in centrifugal pumps it has been stated that the static+dynamic head at suction to be greater than the vapor pressure, my question is, if the static reading is negative and the suction velocity head is too small then the total head is negative which is less than the...
  9. flamearrow

    Recirulation pump under performing

    Hi Gents, briefly, we got re circulation pump (D&S) (35 l/s 15.4m & SH-19m) for a tank capacity of 1500 cu.mtr with single suction & discharge (please find attached sketches. pump was giving 10 psi at discharge which was overlooked and modified the system to 8 suction &12 discharge as attached...
  10. flamearrow

    Circulation pump

    Hi everyone, We have a problem with our circulation pump of the firewater tank. the rated power on the plate shows 11 kw, while our reading given 4.7 kw (8.5 R-Y-B, V-L-L -396v) & (Pump 35 l/s & 15.4 m and suction lift of 1.6m, dH-0 m) we have enhanced the suction discharge lines as 8 nos of...

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