Oil Separator Sizing and Distribution for Micro Booster Refrigeration
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Solution Overview
Problem
In micro booster supermarket refrigeration systems, excessive oil flow can interfere with the efficient operation of refrigeration systems, leading to the need for effective oil management to prevent oil accumulation and ensure adequate lubrication of compressors.
Innovation Solution
The system incorporates oil separators with specific configurations and critical charging to separate and manage oil effectively, ensuring both compressors receive adequate oil supplies by sizing the oil separators to hold between 100% to 250% of the initial oil charge and using oil lines with valves to balance oil distribution between compressors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If oil separators are used to remove oil from refrigerant, then oil accumulation in the refrigeration system is prevented, but the complexity of the system increases
Solution Approach 1:
The patent combines multiple oil separators into a single integrated oil separation system that serves both the low temperature and medium temperature compressors. This merging approach maintains effective oil removal from the refrigerant stream while reducing the number of separate components and simplifying the overall system architecture.
Solution Approach 2:
The oil separator system is designed to perform multiple functions: separating oil from refrigerant for both compressors, storing oil for distribution, and providing a centralized oil management system. This multi-functionality reduces the need for separate oil management systems for each compressor, thereby reducing overall system complexity.
2Reliability
If oil is circulated to lubricate compressors, then compressor operation is maintained, but excessive oil flow interferes with efficient refrigeration system operation
Solution Approach 1:
The system employs a feedback mechanism where oil separators continuously monitor and separate oil from the refrigerant stream, and the oil storage system regulates oil distribution to compressors based on their actual lubrication needs. This closed-loop control ensures adequate compressor lubrication while preventing excessive oil from entering the refrigeration cycle and interfering with system efficiency.
Solution Approach 2:
The oil separator system changes the oil concentration parameter in the refrigerant stream by separating and removing excess oil. The oil storage system then controls the rate and amount of oil returned to compressors, maintaining optimal lubrication parameters while preventing oil accumulation that would harm refrigeration efficiency.
3Reliability
If oil separators are sized to hold 100% to 250% of initial oil charge, then adequate oil supply for both compressors is ensured, but the volume and space requirements increase
Solution Approach 1:
Instead of providing separate oil storage capacity for each compressor, the patent merges the oil storage function into a single centralized oil separator system. This combined system accumulates oil from both compressors and provides a unified oil supply, achieving the required 100%-250% oil charge capacity in one unit rather than duplicating storage capacity across multiple components.
Solution Approach 2:
The oversized oil separator (100%-250% of initial oil charge) serves multiple purposes: it acts as an oil separator, an oil storage reservoir for both compressors, and an oil distribution system. This multi-functional design ensures adequate oil supply reliability while avoiding the need for separate storage tanks, thereby optimizing space utilization.
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 ensures efficient operation by preventing oil accumulation and maintaining adequate lubrication, reducing maintenance and energy losses while minimizing equipment costs and environmental impact through optimized oil management.
Implementation Method 1
The first oil separator is adapted to receive refrigerant and oil from the at least one first compressor through the first inlet. The first oil separator is further adapted to separate at least a portion of the oil from the refrigerant.
Data Source
AI summary
A refrigeration system includes first and second compressors and an oil separator. The oil separator includes an inlet for receiving refrigerant and oil from the first compressor, a refrigerant outlet, and an oil outlet. The oil separator separates the oil from the refrigerant. A portion of the oil separator below a horizontal plane intersecting the refrigerant outlet collects separated oil and has a volume equal to a first compressor oil supply. The first compressor oil supply is greater than or equal to 100% and less than or equal to 250% of a first compressor initial oil charge. The first compressor receives oil from the oil outlet when an amount of oil in the portion is less than or equal to the first compressor oil supply. The second compressor receives oil from the refrigerant outlet when the amount of oil in the portion is greater than the first compressor oil supply.