Variable Economizer Injection Position for Compressor Load Adaptation
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Solution Overview
Problem
In refrigeration and HVAC systems, the economizer's benefits are not fully utilized when the compressor is unloaded, as the fixed economizer injection position becomes ineffective, leading to reduced efficiency due to changing pressure ratios during compression.
Innovation Solution
A compressor with a variable economizer injection position that adjusts along the compression path as the compressor unloads, ensuring the economizer benefits are maintained by selecting suitable injection ports or moving the injection port within the compression chamber, matching the economizer pressure with the compression chamber pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the economizer injection position is fixed, then the economizer benefits are fully utilized when the compressor is at full load, but the economizer becomes ineffective when the compressor is unloaded
Solution Approach 1:
The economizer injection position is made variable rather than fixed. The injection port can move along the compression chamber or select from multiple positions to match the changing pressure conditions when the compressor transitions between full load and unloaded states, maintaining economizer effectiveness across all operating conditions
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 allows the economizer to maintain efficiency even when the compressor is unloaded, optimizing energy use and system performance by adapting the injection position based on working conditions.
Implementation Method 1
The economizer may perform a heat exchanging process with the working fluid from the condenser or other components in the fluid circuit
Implementation Method 2
The economizer circuit injects subcooled vapor into this pocket, incrementally increasing the capacity output of that pocket
Data Source
AI summary
A compressor includes a bore, a rotor disposed within the bore, a compressor inlet, a compressor outlet and a compression chamber defined between the bore and the rotor. A volume of the compression chamber gradually reduces from the compressor inlet to the compressor outlet. An economizer is configured to fluidically connect to the compression chamber. The economizer is configured to inject a working fluid into the compression chamber at an injection position. The injection position is changeable according to a working condition of the compressor.