Modular Helium Compressor Cooling with Separate Oil Circuits
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Solution Overview
Problem
Conventional cryogenic refrigeration systems inefficiently cool helium and oil due to collective cooling methods, where the oil consumes most of the cooling power, preventing helium from reaching optimal performance temperatures.
Innovation Solution
A modular architecture using separate heat exchangers for helium and oil, with chilled water and refrigerant systems, allowing independent and efficient cooling of each fluid to optimize performance, where helium is cooled below 20°C and oil between 45°C and 55°C.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If collective cooling method is used for both helium and oil, then the system structure is simple, but the cooling efficiency of helium deteriorates because oil consumes most of the cooling power
Solution Approach 1:
The patent divides the cooling system into separate cooling circuits for helium and oil. The helium cooling circuit includes a helium heat exchanger with chilled water flowing through it, while the oil cooling circuit includes an oil heat exchanger. This segmentation allows independent optimization of cooling for each fluid, preventing oil from consuming excessive cooling power and enabling helium to reach optimal temperatures below 20°C.
2Temperature
If separate heat exchangers are used for helium and oil, then the cooling efficiency of helium is improved, but the device complexity increases
Solution Approach 1:
The patent employs a modular architecture where a single chilled water source serves multiple cooling functions. The chilled water system can be configured to cool both the helium heat exchanger and the oil heat exchanger through separate circuits. This multi-functionality approach allows the system to achieve independent cooling optimization for both fluids while avoiding the need for completely separate cooling systems, thereby limiting the increase in overall system complexity.
3Temperature
If oil is cooled to high flow rate, then the oil temperature is maintained below 50°C, but the cooling power available for helium is reduced
Solution Approach 1:
The patent implements separate cooling circuits that allow independent control of cooling power allocation. The oil cooling circuit maintains oil temperature below 50°C through dedicated heat exchange, while the helium cooling circuit independently manages helium cooling. This segmentation enables the system to maintain high oil flow rates for adequate lubrication without compromising the cooling power available for helium, as each circuit operates independently with its own heat exchanger and flow control.
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 the performance of cryogenic refrigeration systems by optimizing the cooling of helium and oil independently, reducing power consumption, and extending the system's operational life by maintaining optimal fluid temperatures and flow rates.
Implementation Method 1
A first heat exchanger is configured such that cold chill water flows into an inlet in the first heat exchanger, and circulates within an interior volume of the first heat exchanger, before exiting as warm chill water out of an outlet of the first heat exchanger. Hot helium is introduced through a first conduit within the heat exchanger, and is cooled to yield cool helium flowing out of the first conduit.
Implementation Method 2
A second heat exchanger is configured with a second conduit extending therethrough for communicating oil from a hot oil inlet to a cool oil outlet. The warm chill water from the first heat exchanger is reused with the second heat exchanger for cooling the oil.
Data Source
AI summary
A modular architecture for helium compressors is described. In the modular architecture, oil is cooled independently from gas. In one aspect, the oil is cooled subsequent to the gas with a series of water-cooled heat exchangers. In another aspect, the oil is cooled using a water-cooled heat exchanger coupled to a radiator, and the gas is independently cooled using a refrigerant-cooled heat exchanger coupled to a condensing unit.