Method and system for improving refrigeration system efficiency
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Solution Overview
Problem
Traditional commercial refrigeration systems are inefficient due to fixed compressor and expansion valve settings, leading to excessive power consumption, especially in varying ambient temperatures, as they fail to adapt to changes in environmental conditions.
Innovation Solution
An electronically controlled refrigeration system that monitors system fluid temperatures and pressures to adjust expansion valves, compressor motors, and condenser fans, allowing for dynamic optimization of pressure differentials and compressor work to maintain desired cooling conditions while minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If traditional fixed settings for compressors and expansion valves are used, then the system operates reliably in standard conditions, but power consumption increases excessively when ambient temperatures vary
Solution Approach 1:
The patent implements electronic expansion valves with variable opening degrees and variable speed compressors that dynamically adjust their operating parameters based on real-time ambient temperature detection. The controller modifies the expansion valve opening degree and compressor speed in response to detected ambient conditions, transforming fixed-component operation into dynamic adaptation, thereby reducing power consumption while maintaining cooling effectiveness across varying environmental conditions
Solution Approach 2:
The system changes operational parameters (expansion valve opening degree, compressor speed) based on detected ambient temperature parameters. When ambient temperature is low, the controller reduces the expansion valve opening degree and compressor speed; when ambient temperature is high, it increases these parameters. This parameter adaptation allows the system to optimize power consumption while maintaining reliable operation across different ambient conditions
2Adaptability or versatility
If pre-determined compressor and expansion valve settings are used, then the system structure remains simple, but the system fails to accommodate environmental changes and consumes excessive power
Solution Approach 1:
The patent implements a feedback control system where an ambient temperature detector continuously monitors environmental conditions and sends signals to the controller. The controller processes this feedback information and automatically adjusts the expansion valve opening degree and compressor speed accordingly. This closed-loop feedback mechanism enables the system to adapt to environmental changes without requiring complex manual intervention or system redesign
Solution Approach 2:
The system performs self-adjustment through automated electronic control. The controller automatically modifies expansion valve and compressor operations based on ambient temperature detection without requiring external intervention. This self-service capability allows the system to accommodate environmental changes while maintaining relatively simple overall structure, as the automation eliminates the need for complex mechanical adjustment mechanisms
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 reduces overall power consumption, extends component longevity, and adapts to varying ambient conditions, providing efficient and economical cooling in refrigerated areas.
Implementation Method 1
the one or more expansion valves configured to convert the liquid to a liquid-vapor mix at a pressure of the liquid-vapor mix that is lower than a pressure of the liquid
Implementation Method 2
the evaporator configured to convert the liquid-vapor mix to a second vapor
Implementation Method 3
the evaporator configured to convert the liquid-vapor mix to a second vapor, a pressure of the second vapor being lower than a pressure of the first vapor
Implementation Method 4
the one or more compressors configured to receive the second vapor, compress the second vapor, and discharge the first vapor at the pressure of the first vapor that is greater than the pressure of the second vapor
Implementation Method 5
a condenser configured to receive a first vapor and discharge a liquid
Data Source
AI summary
A method and system for improving energy efficiency of a refrigeration system include system components such as a condenser, one or more expansion valves, an evaporator, one or more compressors, and a system controller electrically coupled to the one or more of the system components, according to one embodiment. The system controller is configured to selectively actuate, directly or indirectly, the one or more expansion valves, the condenser, and/or the one or more compressors, at least partially based on temperatures and/or pressures of the system fluid at various points of the system, to control a temperature of a refrigerated area.