Heat Pipe Calibration with External Chamber Pressure Limiting
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Solution Overview
Problem
Current heat transfer systems, such as heat pipes and thermo siphons, have limited temperature ranges and inefficient control over heat flow, leading to excessive energy transfer and potential damage to cooling units during high-temperature operations, as well as uncontrolled gas pressure at high temperatures.
Innovation Solution
Incorporating an external chamber connected to the heat pipe or thermo siphon to control thermal conductivity by condensing working fluid at a specific temperature, limiting energy transfer and gas pressure, and allowing for ambient or temperature-controlled operation to expand the temperature range and improve heat flow management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the cooling unit operates at high temperatures to expand the calibrator's temperature range, then the temperature range is extended, but the cooling unit's reliability deteriorates and pressure management becomes problematic
Solution Approach 1:
The patent introduces an external chamber as an intermediary component between the heat pipe and the cooling unit. This chamber contains a working fluid that condenses at a controlled temperature, acting as a mediator that limits the maximum temperature transmitted to the cooling unit. The external chamber thus protects the cooling unit from excessive temperatures while allowing the calibrator to operate at higher temperatures through the heat pipe.
Solution Approach 2:
The patent changes the temperature parameter at which the working fluid condenses by selecting appropriate fluids with different boiling points. This allows control over the temperature limit imposed on the cooling unit, enabling the system to operate reliably within optimized temperature ranges while still achieving extended temperature capability in the calibrator.
2Power
If the heat pipe transfers heat efficiently across a wide temperature range, then heat transfer efficiency is improved, but pressure control becomes difficult at high temperatures
Solution Approach 1:
The external chamber serves as a pressure-regulating intermediary. The working fluid in this chamber condenses at a predetermined temperature, creating a pressure barrier that limits the maximum pressure transmitted to the heat pipe. This mediator allows the heat pipe to operate efficiently at high temperatures while preventing excessive pressure buildup.
Solution Approach 2:
The patent utilizes the phase transition (condensation) of the working fluid in the external chamber to control pressure. When the temperature reaches the condensation point, the gas converts to liquid, dramatically reducing pressure and preventing runaway pressure increases in the heat pipe system.
3Productivity
If the cooling unit is maintained at low temperatures for efficient cooling, then cooling performance is improved, but the temperature range of the calibrator is restricted
Solution Approach 1:
The patent segments the thermal management system into distinct functional zones: the external chamber handles temperature limitation and pressure control, the heat pipe handles efficient heat transfer, and the cooling unit handles active cooling. This segmentation allows each component to operate optimally within its designated temperature range while the overall system achieves extended temperature capability.
Solution Approach 2:
The heat pipe acts as a thermal intermediary that decouples the temperature ranges of the cooling unit and the calibrator. It efficiently transfers heat from the high-temperature calibrator to the low-temperature cooling unit, allowing the cooling unit to remain at optimal low temperatures while the calibrator operates at extended high temperatures.
4Temperature
If the working fluid condenses at high temperatures to extend operating range, then temperature range is expanded, but the cooling unit must operate at higher temperatures reducing its efficiency
Solution Approach 1:
The external chamber with condensing working fluid serves as a thermal mediator that protects the cooling unit from high temperatures. This allows the cooling unit to operate efficiently at lower temperatures while the overall system achieves extended high-temperature capability through the heat pipe's ability to transfer heat across large temperature differences.
Solution Approach 2:
The patent changes the condensation temperature parameter of the working fluid in the external chamber to be lower than the maximum operating temperature of the calibrator. This parameter selection allows the cooling unit to operate at efficient lower temperatures while still enabling the calibrator to reach higher temperatures through controlled heat transfer.
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 solution extends the temperature range of the calibrator, enhances heat flow control, reduces energy transfer, and limits gas pressure, enabling faster cooling and heating rates while preventing damage to cooling units, ensuring efficient and precise temperature calibration.
Implementation Method 1
Heat is absorbed in the evaporator region by vaporizing the working fluid
Implementation Method 2
The vapour transports heat to the condenser region where the vapour condenses, releasing heat to the cooling medium
Implementation Method 3
When the temperature of the unit is higher than the temperature of the external chamber, the working fluid will condensate in the external chamber leaving only gas in the unit
Data Source
AI summary
The invention relates to a temperature calibrating system (1) comprising a thermo siphon, a heat pipe or an equivalent (2) connected between a cooling unit (4) and a temperature calibration unit (3), where the system (1) further comprises an external chamber (8) connected to the heat pipe/thermo siphon or equivalent (2) for controlling the thermal conductivity between the two units and where the temperature of the external chamber (8) is held at a certain temperature, for example ambient temperature or a temperature controlled by external means. The external chamber (8) can be connected to the heat pipe/thermo siphon (2) via a conduit (9) which connection point is placed above liquid level at a evaporating end of the heat pipe/thermo siphon (2) and in that the external chamber (8) is arranged below the connection between the conduit (9) and the heat pipe/thermo siphon (2).