Cryogenic Pump Cooling Jacket Heat Rejection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Operating pumps within closed cryogenic storage vessels poses challenges due to the need for effective heat management and lubrication in cryogenic environments, as existing solutions often rely on the cryogenic fluid for cooling and lubrication, which can lead to inefficient heat rejection and potential temperature control issues.
Innovation Solution
A cryogenic fluid system with a submerged pumping system featuring a cooling jacket around the electric drive, allowing for heat exchange with the cryogenic fluid, which transitions the fluid from the storage vessel to a machine, thereby managing heat rejection efficiently without the need for additional temperature or pressure control mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a submerged pump is used in a closed cryogenic storage vessel, then the pump can convey cryogenic liquid fuel from the storage vessel, but heat management and lubrication become challenging due to the cryogenic environment
Solution Approach 1:
The pump is divided into functionally independent segments: the drive section (with motor and cooling jacket) and the pumping section (with pump chamber and discharge port). This segmentation allows the drive section to be cooled separately by circulating cryogenic fuel through the cooling jacket, while the pumping section handles fuel conveyance, thereby resolving the heat management challenge in the submerged cryogenic environment
Solution Approach 2:
A cooling jacket is introduced as an intermediary thermal management system between the drive section and the cryogenic fuel. The cooling jacket circulates cryogenic fuel to absorb heat from the motor, acting as a heat transfer medium that enables effective cooling of the drive section without direct thermal contact between the motor and the bulk cryogenic fuel
2Ease of operation
If cryogenic fluid is used for cooling and lubrication, then the pump can operate in the cryogenic environment, but heat rejection becomes inefficient and temperature control issues arise
Solution Approach 1:
The system changes the thermal parameters of the cryogenic fuel by circulating it through the cooling jacket, where it absorbs heat from the motor and increases in temperature. This parameter change (temperature increase) allows the fuel to effectively absorb and reject heat, improving heat rejection efficiency while maintaining operation in the cryogenic environment
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 effectively transitions cryogenic fluid while managing heat rejection within the cryogenic environment, reducing the risk of temperature increases and operational issues, and allowing for reliable operation of the pumping system without additional venting or temperature control requirements.
Implementation Method 1
a cooling jacket forming a heat exchange cavity about the electric drive for conveying the fluid in heat transference contact with the electric drive
Data Source
AI summary
A cryogenic fluid system includes a vessel and a pumping system positioned for submerging within cryogenic fluid within the vessel. The pumping system includes an electric drive structured to move a pumping element within a pumping chamber to pump cryogenic fluid out of the vessel. A cooling jacket forms a heat exchange cavity about the electric drive such that heat is rejected externally of the storage vessel.