Mixed-Capacity Compressor Configuration for Part-Load Efficiency
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Solution Overview
Problem
Existing chiller systems with multiple compressors often operate at suboptimal efficiency due to balanced load distribution across identical compressor models, which limits overall system performance and efficiency.
Innovation Solution
A chiller system with a compressor section comprising compressors of different capacities, where a controller selectively operates these compressors to achieve the most efficient performance by adjusting their speeds and operational states based on system demands, allowing for mixed model configurations and economizer switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If balanced load distribution is used across identical compressor models, then operation simplicity is improved, but total system efficiency deteriorates
Solution Approach 1:
The patent applies asymmetry by using compressors of different models and capacities within the same compressor section. Instead of identical compressors with balanced load distribution, the system employs asymmetric configurations where each compressor model is selected to operate optimally at different load conditions, thereby improving total system efficiency while maintaining operational simplicity through automated controller management.
2Loss of energy
If compressors of different capacities are used, then system efficiency is improved, but device complexity increases
Solution Approach 1:
The patent employs feedback control through an automated controller that monitors system conditions and selectively operates different compressor models based on real-time demands. This feedback mechanism manages the complexity of having multiple compressor models by automatically determining optimal operation, thereby improving system efficiency without requiring complex manual intervention or coordination.
Solution Approach 2:
The controller serves multiple functions by managing different compressor models, selecting which compressors to operate, and optimizing their performance. This multi-functionality consolidates the complexity management into a single control system, allowing the use of diverse compressor capacities while maintaining manageable overall system complexity.
3Productivity
If selective operation of different compressor models is implemented, then full-load and part-load efficiency are improved, but control complexity increases
Solution Approach 1:
The controller autonomously manages the selective operation of different compressor models without requiring external intervention or complex programming. Each compressor model operates independently based on system demands, and the controller automatically determines optimal combinations, allowing the system to self-optimize efficiency across different load conditions while keeping control complexity manageable.
Data Source
AI summary
A chiller system according to an exemplary aspect of the present disclosure includes a compressor section and a controller. The compressor section has a first refrigerant compressor having a first cooling capacity and a second refrigerant compressor having a second cooling capacity different from the first cooling capacity. The controller is configured to selectively operate the first and second refrigerant compressors.