Systems and methods for compressor design
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Solution Overview
Problem
HVAC systems face inefficiencies due to compressor losses, which are influenced by the fixed volume ratio of compressors, leading to suboptimal performance and increased operational costs.
Innovation Solution
The method involves determining the optimal compressor volume ratio based on weighted environmental operating conditions and refrigerant properties to minimize compressor losses and maximize system efficiency, using a multi-stage compressor design that adjusts volume ratios for heating and cooling operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed volume ratio compressor is used, then the compressor structure is simple, but the compressor efficiency is suboptimal due to compression losses
Solution Approach 1:
The patent applies the dynamics principle by transitioning from a fixed volume ratio compressor to a variable volume ratio compressor. The compressor now adjusts its volume ratio dynamically based on operating conditions (heating vs. cooling mode, environmental temperature, refrigerant properties), allowing optimal compression efficiency across different scenarios while maintaining a fundamentally simple compressor structure.
2Loss of energy
If the compressor volume ratio is optimized for specific conditions, then the compressor efficiency increases, but the device complexity increases due to multi-stage design
Solution Approach 1:
The patent applies parameter changes by optimizing the volume ratio parameter based on specific operating conditions. Different volume ratios are selected for heating mode versus cooling mode, and further adjustments are made based on environmental temperature and refrigerant properties. This allows the compressor to achieve optimal efficiency for each condition without requiring completely different hardware designs.
3Device complexity
If a single volume ratio is used for all operations, then the device complexity is low, but the adaptability to different environmental conditions is poor
Solution Approach 1:
The patent implements feedback by continuously monitoring operating conditions (heating/cooling mode, environmental temperature, refrigerant state) and adjusting the compressor volume ratio accordingly. This feedback mechanism enables the compressor to adapt to varying environmental conditions and operational requirements, achieving high versatility without requiring complex manual intervention or multiple dedicated systems.
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 approach optimizes compressor efficiency and reduces energy losses, enhancing the overall performance and reducing operational costs of HVAC systems by calculating the ideal volume ratio for various environmental conditions.
Implementation Method 1
a compressor used to compress and discharge gas-phase refrigerant
Implementation Method 2
a fluid transitioning from gas to liquid releases heat
Implementation Method 3
the refrigerant to cycle between the liquid and gas phases
Implementation Method 4
a fluid transitioning from liquid to gas absorbs heat
Implementation Method 5
the refrigerant to cycle between the liquid and gas phases
Implementation Method 6
heat exchangers, which are part of the closed loop and designed to transfer heat between the circulating refrigerant and flowing ambient air
Data Source
AI summary
A method for designing a compressor operable to compress a refrigerant. The method may include determining operating conditions for the compressor. The method may also include weighting the operating conditions. The method further include determining a compressor volume ratio based on the refrigerant and the weighted operating conditions.