1
Why is it a good idea to make a well where the groundwater level is as high as possible?
2
How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
3
By-pass control is an efficient way of performance regulating a pump but what is the downside of the process?
4
What could be the consequences of using an undersized pump in a well?
5
In which areas is there a bigger risk of pumping corrosive groundwater?
6
What should the minimum flow past the motor be to ensure sufficient motor cooling?
7
What can be done to the well if sand continues to enter a well after the well development has been carried out?
Test results
01.
Q: Why is it a good idea to make a well where the groundwater level is as high as possible?
A: The shorter the distance is to the water the less expensive it is to make the borehole and subsequently to pump the water to the surface
01.
Q: Why is it a good idea to make a well where the groundwater level is as high as possible?
A: The shorter the distance is from the surface to the ground water, the better the water quality is
01.
Q: Why is it a good idea to make a well where the groundwater level is as high as possible?
A: A higher level means lower water temperatures and better motor cooling
02.
Q: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
A: It increases speed and thereby the performance of the pump
02.
Q: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
A: It raises the motor temperature, reducing the lifetime
02.
Q: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
A: It reduces flow and pressure
03.
Q: By-pass control is an efficient way of performance regulating a pump but what is the downside of the process?
A: The by-passed water is wasted and cannot be used again
03.
Q: By-pass control is an efficient way of performance regulating a pump but what is the downside of the process?
A: The motor temperature rises and increases the risk of motor burn-out
03.
Q: By-pass control is an efficient way of performance regulating a pump but what is the downside of the process?
A: Energy is wasted as the pump continues to run at full speed
04.
Q: What could be the consequences of using an undersized pump in a well?
A: The pump will give too high pressure
04.
Q: What could be the consequences of using an undersized pump in a well?
A: The risk of cavitation is very high
04.
Q: What could be the consequences of using an undersized pump in a well?
A: The pump may not be able to deliver the required capacity
05.
Q: In which areas is there a bigger risk of pumping corrosive groundwater?
A: In forests with old trees
05.
Q: In which areas is there a bigger risk of pumping corrosive groundwater?
A: In coastal areas
05.
Q: In which areas is there a bigger risk of pumping corrosive groundwater?
A: In elevations above 1000 m
06.
Q: What should the minimum flow past the motor be to ensure sufficient motor cooling?
A: 0,5 m/s
06.
Q: What should the minimum flow past the motor be to ensure sufficient motor cooling?
A: 0,15 m/s
06.
Q: What should the minimum flow past the motor be to ensure sufficient motor cooling?
A: There are no specific requirements
07.
Q: What can be done to the well if sand continues to enter a well after the well development has been carried out?
A: The well driller can try to run the pump at its maximum capacity in short periods of time over a couple of days
07.
Q: What can be done to the well if sand continues to enter a well after the well development has been carried out?
A: The well driller can replace the casing with a new one with smaller slots
07.
Q: What can be done to the well if sand continues to enter a well after the well development has been carried out?
A: An additional filter can be installed inside the casing
08.
Q: What is well development?
A: The drilling of a hole in the ground to find groundwater
08.
Q: What is well development?
A: The installation of the well casing in the centre of the borehole
08.
Q: What is well development?
A: A process that ensures that the well’s sand filter has been improved so the well produces clean, sand-free water