Refrigerant Receiver Monitoring for Early Leak Detection
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Solution Overview
Problem
Existing cooling systems in data centers lack the ability to detect refrigerant leaks, which can lead to inefficient operation and potential equipment damage due to undetected refrigerant loss.
Innovation Solution
A method and system that establish a baseline measurement of refrigerant mass using sensors and continuously monitor the mass over time, triggering an alarm when a loss is detected, allowing for timely intervention and maintaining system efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If refrigerant loss is not detected, then the cooling system continues to operate, but equipment damage occurs and system efficiency deteriorates
Solution Approach 1:
The patent implements a feedback mechanism by continuously monitoring refrigerant mass in the receiver and comparing it to a baseline value. When the monitored mass falls below the baseline by a threshold amount, an alarm is triggered. This closed-loop feedback system enables automatic detection of refrigerant leaks without requiring complex manual inspection procedures, thus improving reliability while maintaining acceptable system complexity.
Solution Approach 2:
The cooling system performs self-diagnosis by using its own existing sensor to monitor refrigerant mass. The system compares current refrigerant mass against a pre-established baseline and automatically generates an alarm when loss is detected. This self-service approach eliminates the need for external detection equipment or manual checks, protecting equipment while adding minimal system complexity.
2Difficulty of detecting and measuring
If a sensor is added to detect refrigerant mass, then refrigerant leaks can be detected, but the system complexity increases
Solution Approach 1:
The system utilizes the refrigerant receiver's existing level sensor to perform dual functions: both level indication and refrigerant mass detection. By repurposing the existing sensor capability, the system achieves refrigerant mass monitoring without adding dedicated detection hardware, thereby reducing the increase in system complexity while improving detection capability.
Solution Approach 2:
The sensor in the refrigerant receiver is made multi-functional, serving both as a level indicator and as a refrigerant mass detector. This universal application of the existing sensor eliminates the need for separate detection equipment, reducing system complexity while enabling effective refrigerant loss monitoring and detection.
3Reliability
If continuous monitoring is implemented, then early leak detection is achieved, but energy consumption and system complexity increase
Solution Approach 1:
Instead of truly continuous monitoring, the system implements periodic sampling of refrigerant mass at predetermined time intervals. The controller compares periodically obtained sensor readings against the baseline value. This periodic approach maintains reliable leak detection capability while significantly reducing energy consumption compared to continuous real-time monitoring, as the sensor and processing are activated only at intervals.
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
Enables early detection of refrigerant leaks, preventing equipment damage and ensuring optimal cooling system performance by alerting operators to refrigerant loss, thereby extending the system's operational lifespan and reducing maintenance costs.
Implementation Method 1
a sensor configured to detect a level of refrigerant within the receiver
Data Source
AI summary
A method of detecting loss of refrigerant within a cooling system of the type having a condenser, a refrigerant receiver in fluid communication with the condenser, a sensor configured to detect a level of refrigerant within the receiver, an evaporator in fluid communication with the receiver, and a pump or compressor in fluid communication with the evaporator and the condenser, includes establishing a baseline measurement of refrigerant mass contained in the receiver with the sensor during certain power loads applied to the cooling system, monitoring a mass of refrigerant in the receiver with the sensor at a certain power load applied to the cooling system, and identifying whether the monitored mass of refrigerant is less than the baseline measurement of refrigerant mass over a predetermined period of time. Systems for detecting loss of refrigerant are further disclosed.