Heat Source Load Balancing Through Compressor Feedback Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In heat source systems with multiple independent refrigeration cycles in series, the existing method of equally dividing hot/chilled water temperature differences among heat source machines leads to compressor load bias, resulting in uneven compressor life due to varying compression ratios and loads.
Innovation Solution
A system that includes an information acquisition unit to monitor compressor operation frequencies, current consumption, power consumption, and torque, with a load distribution change unit adjusting the load distribution among heat source machines to equalize these values, and a temperature setting unit setting hot/chilled water outlet temperatures based on the adjusted load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hot/chilled water temperature difference is equally divided among heat source machines, then control simplicity is improved, but compressor load uniformity deteriorates
Solution Approach 1:
The control device acquires operation information (operation frequency, current consumption, power consumption, or torque) from each heat source machine's compressor and uses this feedback to adjust the hot/chilled water outlet temperature set values, thereby equalizing the loads among compressors
Solution Approach 2:
The system changes the outlet temperature parameter for each heat source machine based on acquired operation information, adjusting temperatures dynamically to balance compressor loads rather than using fixed equal division
2Ease of operation
If outlet temperature set values are assigned sequentially from first stage to subsequent stages, then temperature control is simplified, but compressor life uniformity deteriorates
Solution Approach 1:
The control device continuously monitors operation information from each compressor and adjusts outlet temperature set values accordingly, creating a closed-loop control system that equalizes compressor loads and extends their service lives uniformly
Solution Approach 2:
The system transitions from static equal temperature division to dynamic temperature adjustment, where outlet temperatures are continuously optimized based on real-time compressor operation conditions to maintain load balance
Data Source
AI summary
A heat source system that optimizes a load on compressors in multiple heat source machines with respective independent refrigeration cycles that are situated in series. This is accomplished by using an information acquisition unit that acquires measurement values of operation frequencies of compressors from the respective heat source machines, a load distribution change unit that changes a load distribution currently assigned to each of the heat source machines, and a temperature setting unit that sets the hot/chilled water outlet temperatures of respective heat source machines.