Low-Yield Well Pump Control via Pressure Feedback
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Solution Overview
Problem
Low-yield water wells often fail to meet peak usage demands, leading to over-pumping, sediment intrusion, and pump damage due to insufficient water refill rates, which can result in well drying and decreased production over time.
Innovation Solution
An engineered control and monitoring system that optimizes water production from low-yield wells by using pressure transducers to manage water levels in storage tanks, regulating pump operation, and maintaining proper pressure, preventing over-pumping and sediment entry, allowing for efficient distribution of water during peak usage without substantial well modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the pump operates continuously to meet peak usage demands, then water supply availability is improved, but the well dries up and pump damage occurs
Solution Approach 1:
The system performs preliminary action by filling storage tanks during off-peak hours when the well has sufficient refill rate, before peak usage demands occur. This allows the pump to operate from stored water during peak times without continuously extracting from the well, preventing well drying and pump damage while ensuring water availability when needed.
Solution Approach 2:
Storage tanks serve as an intermediary between the well and the water distribution system. They decouple the pump operation from continuous well extraction, allowing the pump to run intermittently from stored water during peak usage without directly depleting the well, thus protecting both the well and pump while maintaining supply availability.
2Productivity
If the pump operates at high rate to meet demand, then water supply availability is improved, but sediment enters the shaft and water production deteriorates
Solution Approach 1:
The system implements periodic action by operating the pump in intermittent cycles rather than continuously. The controller monitors well conditions and cycles the pump on and off, allowing refill periods between extraction periods. This periodic operation prevents continual over-pumping that causes sediment intrusion and production deterioration, while still meeting overall water demands through accumulated storage.
3Quantity of substance
If the well is pumped to meet peak usage, then water supply availability is improved, but the water level drops and well dries up
Solution Approach 1:
The system uses feedback by implementing a controller that continuously monitors well conditions (water level, pressure, flow rate) and adjusts pump operation accordingly. When the water level drops or refill rate becomes insufficient, the controller automatically reduces or stops pumping, allowing the well to recover. This feedback control ensures water availability is maintained while preventing well drying by responding to real-time well conditions.
Solution Approach 2:
The system performs preliminary action by accumulating water in storage tanks during periods when the well refill rate is sufficient, before the well becomes depleted. This advance preparation allows the system to meet peak demands from storage rather than continuously pumping from the well, preventing the water level from dropping to dangerous levels.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively increases water supply availability, prevents well drying, maintains pump and well integrity, and ensures consistent water pressure to users, enabling continued functionality of low-yield wells without the need for new drilling.
Implementation Method 1
The use of pressure transducers gives an ability to change input levels and data to our program
Implementation Method 2
The controller then activates the well pump(s), the water then flows up a pipe
Implementation Method 3
through a regulator and into the storage tank(s)
Implementation Method 4
the water then flows up a pipe past a pressure transducer showing the back pressure
Data Source
AI summary
A system and method for operating a low-yield well. The method starts with a pressure transducer telling a control box that a storage tank is low on water. The controller then activates the well pump, the water then flows up a pipe past a pressure transducer showing the back pressure, through a regulator and into the storage tank. The controller is constantly monitoring the tank level and the back-pressure level to indicate when to turn off the well to either stop from over filling the storage tank, or over pumping the well. The controller makes adjustments dependent on the back pressure (which indicates the level of water left in the well) and determines how long to withdraw water and how long to wait until the water can be withdrawn again. The system prevents pumping the well dry, and keeps the pump and well in good operating condition.