I am designing a small automatic drip irrigation system. There will be about 10-15 drippers. Flow through the system will be about 1 l/minute, but this may change if expanding or reducing the system. The entire dripping irrigation system expects a pressure of around 1 Bar (precision is not needed). I only have a water reservoir and I planned to use a submersible pump (ideally a quiet one) to pressurize the fluid system.
This seems to be harder than I expected because all the pumps I see are designed for completely different conditions - especially much large flow - e.g. 15 l/minute. If there is one with a lower throughput, then it also has a smaller pressure than I need. It looks like moving a small amount of water at a higher pressure is harder than a larger amount.
- Can a water pump e.g. 12V, 1.5 Bar, 15 l/minute be used with a lower voltage to achieve 1.5 bar and 1/l minute? Could this be combined with pressure sensor and PID regulator?
- What about some water returning back to the reservoir to keep the water flow at 15 l/minute. Could a pressure valve returning water back to the reservoir be used for this?