Irrigation Conduit Turbine Loading for Variable Flow Power Output
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Solution Overview
Problem
Existing irrigation systems face challenges in efficiently generating power across varying fluid flow rates, leading to poor performance at low and high speeds due to fixed loading, which results in inconsistent power output and potential component failure.
Innovation Solution
Implementing a variable load impedance system that adjusts based on fluid flow characteristics, such as frequency of the electrical power signal, to optimize power generation across multiple flow rates, and incorporating electrical braking mechanisms to manage high flow conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed loading is used in the hydro-power generator, then the system structure is simple, but power generation performance is poor at low and high flow rates
Solution Approach 1:
The patent applies dynamics by transitioning from fixed loading to variable loading. The system uses a variable resistor with multiple discrete resistance values that can be switched based on flow rate conditions. This allows the electrical load to dynamically adapt to changing water flow conditions, optimizing power generation across different flow rates while maintaining system reliability.
Solution Approach 2:
The patent implements parameter changes by varying the electrical load resistance based on flow rate. The control system monitors flow conditions and switches between different resistance values (R1, R2, R3, etc.) to optimize the electrical parameters. This parameter adjustment ensures consistent power output across varying flow conditions without requiring complex structural changes.
2Device complexity
If fixed loading is used, then the device complexity is low, but power generation efficiency varies significantly across different flow rates
Solution Approach 1:
The system uses dynamic loading control where the electrical resistance is adjusted in real-time based on flow rate conditions. The control circuit monitors flow characteristics and switches between predefined resistance values to optimize power extraction efficiency across the entire operating range, from low to high flow rates.
Solution Approach 2:
The patent employs periodic action through pulse-width modulation (PWM) control. The switching circuit periodically adjusts the electrical load in discrete steps based on flow rate thresholds. This periodic adjustment of loading parameters allows the system to maintain optimal efficiency across varying flow conditions without continuous complex control.
3Device complexity
If no electrical braking is provided, then the system is simpler, but excessive rotational speeds can occur during high flow conditions causing component failure
Solution Approach 1:
The patent converts the harmful effect of excessive kinetic energy during high flow conditions into useful electrical energy through electrical braking. When flow rate exceeds safe operating limits, the system activates braking resistance that converts the turbine's excessive rotational energy into electrical heat, protecting components while potentially harvesting additional energy from the high-flow condition.
Solution Approach 2:
The system implements preliminary anti-action by detecting high flow conditions before they cause damage. The control circuit monitors flow rate and preemptively activates electrical braking when thresholds are approached, preventing excessive speeds and potential component failure before they occur.
4Reliability
If variable load impedance is implemented, then power output consistency improves, but the device complexity increases
Solution Approach 1:
The system achieves variable loading through a switching network that connects different fixed resistance values based on control signals. Rather than using continuously variable components, the patent employs discrete resistance steps switched by transistors or relays, maintaining simplicity while achieving the necessary dynamic adjustment for consistent power output.
Solution Approach 2:
The patent segments the variable loading function into discrete resistance steps (R1, R2, R3, etc.). Each resistance value corresponds to a specific flow rate range. The control system selects the appropriate segment based on monitored conditions, achieving variable loading效果 through simple switching between predefined values rather than continuous adjustment.
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
Enhances power generation efficiency and extends component life by ensuring consistent power output across varying flow rates and preventing excessive rotational speeds.
Implementation Method 1
a turbine of a generator activated through a fluid flow in a conduit of an irrigation system
Implementation Method 2
the generator configured to output an electrical power signal in response to the activation of the turbine
Data Source
AI summary
Some embodiments provide hydro-power generation systems for irrigation systems. In some embodiments, a system comprises a generator comprising a turbine at least partially inserted into a fluid flow path of a conduit of the irrigation system and to be activated by a fluid flow in the conduit, wherein the generator is to output an electrical power signal; a control circuit to: determine a characteristic of the electrical power signal; determine, based on the characteristic, a load impedance selected from a plurality of load impedances; and output a control signal to select the load impedance. The system also comprises a variable load circuit to: receive the control signal; and provide the load impedance, where an impedance of the variable load circuit is based on the characteristic to provide power generation over various flow rates of fluid in the fluid flow path.