Cooling system
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Solution Overview
Problem
In vapor ejection cooling systems, oil buildup occurs when all refrigerant from a load is directed to a flash tank, leading to oil cycling without separation, which can cause component degradation and failure.
Innovation Solution
An additional oil separator is placed in the system to separate oil from the refrigerant before it reaches the flash tank, ensuring the oil is returned to the compressor and preventing oil cycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all refrigerant from the load is directed to the flash tank to improve cooling efficiency, then the cooling efficiency is improved, but oil buildup occurs in the system
Solution Approach 1:
An oil separator is introduced as an intermediary component between the load and the flash tank. The oil separator intercepts the refrigerant-oil mixture before it enters the flash tank, separates the oil from the refrigerant, and directs the separated oil to the compressor. This mediator prevents oil from accumulating in the flash tank while maintaining the efficient refrigerant cycling path for cooling.
Solution Approach 2:
The oil separator extracts oil from the refrigerant stream before the refrigerant enters the flash tank. By removing the harmful oil component from the refrigerant flow, the system maintains efficient heat transfer in the flash tank and prevents oil buildup that would otherwise occur when all refrigerant is directed there.
2Reliability
If an oil separator is added to separate oil from refrigerant, then oil buildup is prevented, but the device complexity increases
Solution Approach 1:
The oil separator performs multiple functions: it separates oil from refrigerant, directs separated oil to the compressor, and allows refrigerant to proceed to the flash tank. By consolidating these functions into a single component, the system prevents oil buildup without requiring multiple separate devices, thereby limiting the increase in system complexity.
Solution Approach 2:
The oil separator serves as a strategic intermediary placed at a critical junction in the refrigerant cycle. This single well-placed component intercepts oil-laden refrigerant, performs separation, and routes both oil and refrigerant to their respective destinations, preventing oil accumulation without fundamentally redesigning the entire system architecture.
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 prevents oil buildup, enhancing the durability and lifespan of cooling system components by ensuring oil is properly separated and returned, thus maintaining system efficiency.
Implementation Method 1
the first oil separator separates an oil from the refrigerant from the first load and directs the refrigerant to an ejector
Implementation Method 2
separates an oil from the refrigerant from the first load and directs the refrigerant to an ejector
Implementation Method 3
The ejector directs the refrigerant from the high side heat exchanger and the refrigerant form the first oil separator to the flash tank
Implementation Method 4
The flash tank directs the refrigerant from the first oil separator to the first compressor
Implementation Method 5
The flash tank directs the refrigerant from the first oil separator to the first compressor
Implementation Method 6
The first compressor compresses the refrigerant from the flash tank
Implementation Method 7
The high side heat exchanger removes heat from a refrigerant
Implementation Method 8
The high side heat exchanger removes heat from a refrigerant
Implementation Method 9
The high side heat exchanger removes heat from a refrigerant
Implementation Method 10
The first load uses the refrigerant from the flash tank to cool a first space proximate the first load
Implementation Method 11
The first load uses the refrigerant from the flash tank to cool a first space proximate the first load
Data Source
AI summary
An apparatus includes a high side heat exchanger, a flash tank, a first load, a first oil separator, and a first compressor. The high side heat exchanger removes heat from a refrigerant. The flash tank stores the refrigerant. The first load uses the refrigerant to cool a first space proximate the first load. During a first mode of operation, the first oil separator separates an oil from the refrigerant from the first load and directs the refrigerant to an ejector. The ejector directs the refrigerant from the high side heat exchanger and the refrigerant form the first oil separator to the flash tank. The flash tank directs the refrigerant from the first oil separator to the first compressor. The first compressor compresses the refrigerant from the flash tank. During a second mode of operation, the first oil separator directs the oil separated from the refrigerant to the first compressor.