Condensing Unit Fluid Injection for Compressor Discharge Temperature Control
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Solution Overview
Problem
Existing climate control systems face inefficiencies in managing refrigerant flow and temperature regulation, particularly in compressors, which can lead to suboptimal performance and potential damage due to high discharge temperatures.
Innovation Solution
A climate control system with a fluid-injection system that includes a compressor, heat exchangers, and a controller to adjust the volume of fluid supplied based on discharge temperature and superheat temperatures, using a conduit and valve to optimize refrigerant flow and reduce discharge temperature through intermediate pressure injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If refrigerant is injected at intermediate pressure into the compressor inlet, then system capacity is enhanced, but discharge temperature may become excessively high
Solution Approach 1:
A third heat exchanger is introduced as an intermediary component between the first and second heat exchangers. This intermediate heat exchanger provides an additional heat transfer stage that cools the refrigerant more effectively before it enters the compressor, thereby mediating the temperature issue while maintaining the capacity-enhancing injection approach
Solution Approach 2:
The refrigerant cooling process is segmented into multiple stages using three separate heat exchangers arranged in series. This segmentation allows for progressive cooling of the refrigerant, with each heat exchanger handling a portion of the temperature reduction, preventing any single stage from becoming overwhelmed and maintaining effective discharge temperature control
2Temperature
If fluid injection volume is increased to reduce discharge temperature, then temperature control improves, but system complexity increases
Solution Approach 1:
The third heat exchanger serves multiple functions: it provides additional cooling for the refrigerant, acts as an intermediary between the first and second heat exchangers, and enables more precise temperature control without requiring separate dedicated components for each function, thereby reducing overall system complexity
Solution Approach 2:
The fluid injection system is merged with the existing heat exchanger network by integrating the third heat exchanger into the refrigerant flow path between the first and second heat exchangers. This combining approach allows temperature control functionality to be added without creating a completely separate, complex subsystem
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
The system enhances performance and efficiency by dynamically controlling refrigerant flow, reducing discharge temperatures, and optimizing compressor operation across various operating conditions, thereby improving overall system capacity and durability.
Implementation Method 1
a compressor (16)
Implementation Method 2
a first heat exchanger (22) in fluid communication with the discharge port, and a second heat exchanger (12) supported by the base and in fluid communication with the first heat exchanger and the compressor
Implementation Method 3
A conduit (62, 72) may be fluidly coupled to the third heat exchanger and the compressor and may selectively supply fluid to the compressor
Data Source
AI summary
A climate control system is provided and may include a compressor, a first heat exchanger in fluid communication with the compressor, a second heat exchanger in fluid communication with the compressor and the first heat exchanger, and a third heat exchanger disposed between the first heat exchanger and the second heat exchanger. A conduit may be fluidly coupled to the third heat exchanger and the compressor and may selectively supply fluid to the compressor. A valve may control a volume of fluid supplied to the compressor via the conduit and a controller may control the valve based on a discharge temperature of the compressor and a super heat temperature of the third heat exchanger.