Rooftop Water Tank Level Control for Overflow-Free Pumping
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Solution Overview
Problem
Rooftop water tank systems in Bangladesh often require manual operation of pumps, leading to undesirable water pressure loss during use, water wastage due to overflow, and potential structural damage from excessive water flow, as well as inefficiencies in refilling and shutting off the pump.
Innovation Solution
An automatic water supply system with water sensors and a controller that communicate wirelessly to activate and deactivate the pump based on water level thresholds, ensuring the tank is filled and refilled automatically, preventing overflow and maintaining consistent water pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual operation of pump is used to refill water tank, then device complexity is reduced, but water pressure stability deteriorates and water wastage increases
Solution Approach 1:
The system enables automatic self-service operation through float-activated mechanisms. The float automatically activates the pump when water level drops and deactivates it when water level rises, eliminating the need for manual intervention while maintaining reliable water pressure stability through consistent automatic refilling operations.
Solution Approach 2:
The float mechanism provides continuous feedback on water level conditions to the pump control system. When the float detects low water level, it sends a signal to activate the pump; when water level rises to the appropriate level, the float signals pump deactivation, creating a closed-loop feedback system that maintains stable water pressure without manual intervention.
2Reliability
If pump operates continuously to ensure water supply, then water pressure stability is improved, but water wastage due to overflow increases
Solution Approach 1:
The pump operates periodically rather than continuously, activated only when the float detects low water level and deactivated when the tank reaches appropriate water level. This periodic operation pattern ensures water pressure stability during active pumping while preventing water wastage by stopping the pump before overflow occurs.
Solution Approach 2:
The float provides real-time feedback on water level to control pump operation timing. The feedback mechanism ensures the pump stops at the optimal moment when water reaches the desired level, preventing both water wastage from overflow and pressure instability from incomplete refilling.
3Device complexity
If manual monitoring of water level is used, then device complexity is reduced, but loss of time in detecting water levels increases
Solution Approach 1:
The float mechanism provides continuous automatic monitoring of water level without requiring human intervention. The system constantly detects water level changes and immediately responds by activating or deactivating the pump, eliminating the time delay associated with manual monitoring while keeping the system simple and reliable.
4Device complexity
If pump is deactivated late after tank overflow, then water wastage increases, but device complexity remains low
Solution Approach 1:
The float mechanism takes preliminary action by continuously monitoring water level and activating the pump before the tank reaches capacity. The system proactively manages water levels to prevent overflow conditions from occurring in the first place, rather than reacting after overflow has already begun.
Solution Approach 2:
The float provides continuous feedback that enables timely pump deactivation exactly when water reaches the appropriate level. This feedback mechanism ensures the pump stops operation at the optimal moment, preventing water wastage from overflow while maintaining simple system operation.
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 ensures continuous water supply by automatically refilling the tank, reducing water wastage, and preventing structural damage, while maintaining consistent water pressure by using sensors to manage pump operation based on water levels.
Implementation Method 1
The first sensor is configured to determine that a water level in the water tank has fallen below a first level
Implementation Method 2
The second sensor is configured to determine that the water level in the water tank has risen to at least a second level
Implementation Method 3
a pump that is configured to deliver water to the water tank
Implementation Method 4
by placing a building's water supply above the piping that is used to deliver water from the tank to outlet locations within the building (e.g., faucets), water pressure may be established in the building by gravity
Data Source
AI summary
A system includes first and second sensors, and a controller. The first and second sensors are operable to attach to a water tank that supplies a building with water. The first sensor is configured to determine that a water level in the tank has fallen below a first level. The second sensor is configured to determine that the water level has risen to at least a second level. The controller includes a processor that is communicatively coupled to the sensors. The processor receives, from the first sensor, an indication that the water level has fallen below the first level. In response, the processor generates a signal to activate a pump that delivers water to the tank. The processor additionally receives, from the second sensor, an indication that the water level has risen to at least the second level. In response, the processor generates a signal to deactivate the pump.