I am working on a small project where I, from a relatively confined space in a well that has a diameter of 30 cm, will need to transport the water upwards about 2 meters.
I have been looking at ram pumps but cant really see a way to utilise that as i dont have a "higher" water source. I have also been looking at electric pumps on Alibaba and it seems that i'll land at around 2W, which seems like a lot for an iot device - i really dont want to have to recharge the device every week, esp. since there is little energy to harvest nearby.
The requirements are:
- Ability to pump water upwards 2 meters
- Flow of around 12 liters per hour would be enough
- Ideally 12V or lower
What are the best options? :) I know that product recommendations are not allowed, but what techniques should I look at overall? Is there a resource somewhere that compares the efficiency of different pumping methods?
[EDIT] RE comments: In terms of effeciency, I mean as low wattage as possible. I wont have easy access to recharging (solar and wind are out, but potentially the energy of the water flowing down into the well could produce a minor charge for the battery). If we can get to a point where the battery only needs to be changed once a month, that would be perfect.