Liquid Circulation Temperature Control With Heat-Load Flow Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing constant temperature liquid circulating devices face challenges in minimizing temperature variations of the circulating liquid due to heat load changes, leading to unstable performance and increased energy consumption, as they rely on constant flow rates which fail to effectively manage temperature fluctuations in external devices.
Innovation Solution
Incorporating a controller with flow amount and temperature sensors to dynamically adjust the flow rate and pressure of the circulating liquid based on heat load calculations, using a bypass flow channel and electric valves to manage flow, and varying the pump's rotation speed to maintain stable temperature differences between discharge and return temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the flow amount is increased to reduce return temperature variation, then discharge temperature control becomes less precise, requiring wider temperature adjustment range
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting multiple parameters including flow amount, pump rotation speed, and heat exchanger temperature based on detected heat load conditions. This multi-parameter adjustment strategy allows the system to maintain both return temperature stability and discharge temperature precision by optimizing the combination of parameters rather than relying on single-parameter control.
Solution Approach 2:
The system dynamically adjusts flow amount and pump rotation speed based on real-time heat load detection, enabling precise control of discharge temperature while simultaneously maintaining return temperature stability. The dynamic nature of the control allows the system to respond appropriately to different operating conditions.
2Device complexity
If constant flow rate is used, then system simplicity is maintained, but temperature stability in external devices deteriorates due to significant temperature variation with heat load changes
Solution Approach 1:
The patent introduces dynamic control elements including variable speed pumps and controllable flow valves that adjust flow rate based on heat load conditions. These dynamic components enable the system to maintain external device temperature stability by adapting flow characteristics to match actual thermal demands, while the overall system architecture remains relatively simple through centralized control logic.
Solution Approach 2:
The system employs feedback control by detecting return temperature, calculating heat load, and using this information to adjust flow amount and pump operation. This feedback mechanism enables the system to automatically compensate for heat load variations and maintain stable external device temperature without requiring complex manual intervention or overly complicated system design.
3Temperature
If heat exchanger compensates for return temperature changes, then discharge temperature can be maintained, but energy consumption increases due to excessive cooling/heating of all circulating liquid
Solution Approach 1:
The patent applies parameter changes by adjusting flow amount and pump rotation speed to match actual heat load requirements. By dynamically changing these parameters, the system avoids excessive cooling or heating of all circulating liquid, thereby reducing energy consumption in the heat exchanger while still maintaining discharge temperature at the desired level.
Solution Approach 2:
The system applies partial action by adjusting flow rate to match actual thermal needs rather than continuously cooling/heating the entire circulating liquid volume. This partial adjustment approach prevents energy waste by applying thermal processing only to the extent necessary to meet the actual heat load conditions.
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 reduces temperature variations in the circulating liquid and external devices, enhances temperature stability, and achieves energy savings by optimizing flow and pressure adjustments in response to heat load changes.
Implementation Method 1
a conduit 42 having a discharge port 42a and a return port 42b for allowing the temperature controlling liquid in the tank 41 and circulating liquid at a constant temperature, which is heat-exchanged via a heat exchanger 43, to pass through a piping 51
Data Source
AI summary
To reduce the width of variations in temperature of circulating liquid due to a variation in a heat load of an external device to a low level to stabilize the performance of the external device in a constant temperature liquid circulating device. In a constant temperature liquid circulating device that connects a piping of circulating liquid in an external device between a discharge port and a return port of a conduit for delivering the circulating liquid at a constant temperature by a pump, a flow amount sensor and temperature sensors for detecting discharge temperature (T1) of the circulating liquid from the conduit and the return temperature (T2) of the circulating liquid are provided in the conduit, so that the flow amount and the temperature of the circulating liquid is controlled by a controller according to the heat load of the external device obtained on the basis of the outputs from the temperature sensors. The control is such that when the difference between the discharge temperature and the return temperature is smaller than the preset value, the temperature of the circulating liquid is controlled corresponding to the heat load, and when the temperature difference is larger than the preset value, the temperature of the circulating liquid is controlled corresponding to the heat load by increasing the flow amount of the circulating liquid to the piping of the external device in addition to the temperature control described above.