Distributed Cooling System for Work Machines
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Solution Overview
Problem
Existing cooling systems for work machines, such as articulated dump trucks, require high-powered fans that consume significant energy and decrease efficiency, as they often run at maximum speed to cool both liquid coolant and powertrain oil simultaneously, even when only one is hot, leading to increased energy consumption and noise.
Innovation Solution
A distributed cooling system with separate radiators and fans for coolant and oil, along with a heat exchanger and controller to selectively control fan speeds based on temperature data from sensors, allowing for efficient cooling of both liquid coolant and powertrain oil independently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single radiator is used to cool both coolant and oil, then the cooling system structure is simplified, but high-powered fans are required that consume significant energy
Solution Approach 1:
The cooling system is divided into two independent radiators: a first radiator for cooling the coolant and a second radiator for cooling the oil. Each radiator has its own fan and temperature sensor, allowing independent operation. This segmentation enables the system to cool only the specific fluid that needs cooling at any given time, rather than running high-powered fans at maximum speed to cool both fluids simultaneously, thereby reducing energy consumption.
Solution Approach 2:
The system dynamically adjusts fan operation based on real-time temperature conditions. The controller receives temperature data from sensors and selectively activates fans based on which fluid (coolant or oil) exceeds its temperature threshold. This dynamic control allows the system to adapt to varying thermal conditions and operate fans at optimal power levels rather than continuously at maximum capacity.
2Reliability
If fans run at maximum speed to cool both coolant and oil simultaneously, then cooling capacity is sufficient, but energy consumption increases significantly
Solution Approach 1:
The system applies partial action by activating only the necessary fan(s) based on actual cooling needs. Instead of always running both fans at maximum speed, the controller selectively activates fans based on temperature thresholds. When only one fluid requires cooling, only its corresponding fan operates at the required speed, reducing overall energy consumption while maintaining sufficient cooling capacity for the specific condition.
Solution Approach 2:
Temperature sensors continuously monitor the coolant and oil temperatures, providing feedback to the controller. The controller uses this feedback to determine which fan(s) should be activated and at what speed. This closed-loop control ensures that cooling capacity is maintained when needed while avoiding unnecessary energy consumption when temperatures are within acceptable ranges.
3Device complexity
If a single radiator system is used, then the system is simpler, but fan noise increases due to high-powered fans running at maximum speed
Solution Approach 1:
By segmenting the cooling system into two independent radiators with separate fans, the system can operate fans at lower, quieter speeds when only one fluid requires cooling. This eliminates the need for high-powered fans to run at maximum speed continuously, thereby reducing noise pollution while maintaining effective cooling capability when needed.
Solution Approach 2:
The fans operate periodically based on temperature conditions rather than continuously at maximum speed. The controller activates fans only when temperature sensors detect that cooling is needed, and deactivates them when temperatures are within acceptable ranges. This periodic operation based on actual demand significantly reduces noise exposure while maintaining cooling reliability.
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
This approach enhances cooling capacity, reduces energy consumption, and decreases fan noise by optimizing fan operation based on temperature thresholds, enabling work machines to operate in hotter conditions with improved efficiency and operator comfort.
Implementation Method 1
a heat exchanger to cool the liquid coolant and/or the oil... to facilitate the liquid coolant cooling the oil and the oil cooling the liquid coolant
Implementation Method 2
a first radiator to circulate a liquid coolant through the first radiator to cool the liquid coolant, a first fan, connected to the first radiator, to facilitate cooling the liquid coolant
Data Source
AI summary
A distributed cooling system is disclosed. The system may include a first radiator to circulate a liquid coolant through the first radiator to cool the liquid coolant, a first fan, electrically connected to the first radiator, to facilitate cooling the liquid coolant, and a first temperature sensor to obtain first temperature data concerning the liquid coolant. The system may include a second radiator to circulate an oil through the second radiator to cool the oil, a second fan, electrically connected to the second radiator, to facilitate cooling the oil, and a second temperature sensor to obtain second temperature data concerning the oil. The system may include a heat exchanger to cool the liquid coolant and the oil and a controller, electrically connected to the first fan, the first temperature sensor, the second fan, and the second temperature sensor, to control the first fan and the second fan.