Parallel Condensing Unit Control for Balanced Compressor Capacity
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Solution Overview
Problem
Conventional refrigeration systems with parallel condensing units operate independently, leading to inefficiencies such as compressors being activated or deactivated without considering the condenser capacity across the bank of units, resulting in uneven compressor usage.
Innovation Solution
A refrigeration system with a communication link between control modules of multiple condensing units, allowing for coordinated control of compressors and condenser fans based on operating parameters and set points, ensuring balanced compressor activation and deactivation across units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If condensing units operate independently according to local set points, then each unit can autonomously control its own compressors, but compressor capacity is not balanced across the bank of condensing units leading to inefficiency
Solution Approach 1:
The patent combines independent local control modules with a centralized communication network, allowing each condensing unit to maintain autonomous operation while simultaneously enabling system-wide coordination. The control modules exchange operational data through the communication link, facilitating balanced compressor capacity distribution across the bank without sacrificing individual unit independence.
2Device complexity
If compressors are activated and deactivated independently on each condensing unit, then local control is simplified, but uneven compressor usage occurs with some units at maximum capacity while others are at minimum capacity
Solution Approach 1:
The patent implements a feedback mechanism where control modules continuously monitor and exchange operational status information through the communication link. Each module receives feedback about the operational state of other units and adjusts its compressor activation/deactivation decisions accordingly, ensuring balanced capacity utilization and optimal energy efficiency across the entire bank.
Data Source
AI summary
A refrigeration system comprises a plurality of compressors and a plurality of condensing units comprising a first condensing unit having a first control module and at least one additional condensing unit having an additional control module. Each condensing unit has at least one compressor of the plurality of compressors. A communication link is connected to the first control module and at least one additional control module. The first control module controls the plurality of compressors based on communication with the at least one additional control module via the communication link.