In this video we will talk about how to correctly measure the water flow rate for our irrigation system.
I'm Federico from www.tuttoirrigazione.it/ and I want to explain how to make the correct measurement of the flow rate for your irrigation system in a simple way.
One of the simplest systems that we recommend is to use elements that are easily found such as a 5, 10, 15 liter graduated bucket, a stopwatch or timer and a pressure gauge.
You can find a simple kit already made at this link if you need it www.my4garden.com/it/kit-asso...
You will then have to connect everything together with a valve (if you don't have the measurement kit)
With this kit you can take measurements to establish the correct flow rate for our irrigation system project.
This flow rate is a dynamic and not static flow rate and in simple words we simulate the operation of our system at a certain pressure.
How to proceed ?
You take the kit and connect it to the point closest to the water source, to make the reading as realistic as possible, avoiding unnecessary load (pressure) losses.
Once our kit is connected, we will open the main tap completely, waiting for the flow of water to regulate (usually 30 seconds is enough) and we will notice that when fully open, the pressure on the pressure gauge will be "0".
Once these 30 seconds have passed I will begin to close the tap on our kit and we will notice the increase in pressure bringing it to the operating pressure.
If we work with an irrigation system
- with aqueduct (except in particular cases) the test pressure will be around between 2 and 2.5
- when we start to have a pump from 1 to 1.5 (HP) horsepower, if I have static sprinklers or ½" mini turbines we will detect from 2.5 to 3 bars while if the area requires the use of dynamic sprinklers larger ones like ¾" we should go up with the pressure reaching even 4 bar.
I will have to repeat these tests at different pressures to get a general view of my water source so it would be a good idea to take the readings at 2; 2.5; 3 and 4 bar if it arrives (in the case of a pump) and I will use the data with the best flow rate/pressure ratio.
Returning to our first example of an aqueduct, we will bring the pressure gauge to 2 bar by slowly closing our tap, we will wait a few moments to ensure that the water output flow rate stabilizes and, once stabilized, with the chronometer and the bucket we will the measurement.
As ?
We will take our bucket, put them under the tap and at the same time we will also start our stopwatch until they are completely filled.
Once we have filled (example) 10 liters we will stop the measurement, check the time and do the math.
In planning we normally use liters per minute so if it took us 30 seconds to fill 10 liters and a minute is made up of 60 seconds it will only be enough to do 30 seconds x 2 = 60 seconds which will be 1 minute
Having 10 liters in 30 seconds it will be enough to do x 2 = 20 liters in 60 seconds and therefore in 1 minute
This information is fundamental and will be used to correctly design the irrigation system.
Consult our design service www.tuttoirrigazione.it/proge...
Visit our consultancy service www.tuttoirrigazione.it/consu...
Starting correctly with this data is a professional attitude, you don't risk finding strange surprises at the end of everything which will not be the fault of the materials but yours for not starting off on the right foot straight away.
With a small investment you can start in the right way and if you have any other questions don't hesitate to write them here in the comments.
26 сен 2023
