Systems and methods for confirming pump operation
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Solution Overview
Problem
Improper installation of pumps in cooling systems, such as those used in data centers, often results in inefficiency and damage to system components due to incorrect plumbing or wiring, leading to increased energy consumption and downtime.
Innovation Solution
A method involving fluidic coupling of a pump between heat exchangers, monitoring differential pressure, and using a controller to confirm proper pump operation by adjusting expansion valve positions and compressor states to ensure correct installation and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pump installation is not verified, then system complexity remains low, but system reliability deteriorates due to improper operation
Solution Approach 1:
The system performs self-verification by automatically monitoring differential pressure across the pump and comparing it against expected thresholds. The controller executes a verification sequence using existing system components (pump, expansion valve, compressor, pressure sensor) to confirm proper pump installation and operation without requiring external verification equipment or manual intervention.
Solution Approach 2:
The system continuously monitors differential pressure feedback from the pump and uses this information to determine whether the pump is operating correctly. The controller adjusts the expansion valve and compressor based on pressure feedback, and compares actual pressure readings against expected ranges to confirm proper installation and operation.
2Measurement precision
If differential pressure monitoring is implemented, then measurement precision improves, but device complexity increases
Solution Approach 1:
The existing pressure sensor in the cooling system is made multi-functional by using it both for normal system operation monitoring and for pump verification. The same sensor that monitors system pressure during operation is also used to measure differential pressure across the pump during the verification sequence, eliminating the need for separate verification measurement equipment.
Solution Approach 2:
The system performs preliminary actions by closing the expansion valve and stopping the compressor before starting the pump, creating the necessary conditions for accurate differential pressure measurement. This preliminary setup ensures that the pressure reading reflects only pump performance without interference from other system components.
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
Enhances efficiency, prevents system failures, and reduces downtime by ensuring proper pump installation and operation without additional hardware.
Implementation Method 1
a pump, which provides an economizer mode of operation
Implementation Method 2
an expansion valve, which regulates flow between high and low pressure sides
Implementation Method 3
a compressor, which compresses refrigerant gas
Implementation Method 4
two heat exchangers: a condenser, which releases heat from refrigerant to its surroundings, and an evaporator, which absorbs heat from its surroundings to cool the refrigerant
Data Source
AI summary
A method can include fluidically coupling a pump between at least two heat exchangers, confirming that an expansion valve is at least partially open, starting a compressor, beginning a first preselected time period, starting the pump, stopping the compressor once the first preselected time period ends, at least partially closing the expansion valve, beginning a second preselected time period, monitoring a differential pressure across a first point downstream of the pump and a second point upstream of the pump, indicating improper pump installation if the differential pressure does not exceed a first threshold before the second preselected time period has ended, stopping the pump, or any combination thereof. The expansion valve can be fluidically coupled between the pump and one of the heat exchangers. The compressor can be fluidically coupled between the two heat exchangers.