Booster Refrigeration Circuit With Desuperheating for Stable Control
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Solution Overview
Problem
Conventional vapor compression refrigerating systems with booster configurations are highly sensitive to operating condition changes, leading to inefficiencies and increased control efforts.
Innovation Solution
A refrigeration system with a first compressor unit having three compressors connected in parallel, an intermediate expansion device, a condenser/gas cooler, a collecting container, and a desuperheating device, which reduces the sensitivity to operating condition changes by using a cooling branch bypass conduit and expansion devices to control the refrigerant temperature effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a booster system with separate compressors for normal refrigeration and freezing portions is used, then the system can provide both refrigeration and freezing functions, but the system becomes highly sensitive to operating condition changes requiring substantial control efforts
Solution Approach 1:
The patent combines the normal refrigeration compressor and freezing compressor into a single integrated compressor unit that handles both refrigeration circuits. This merger eliminates the need for separate compressor controls and reduces sensitivity to operating condition changes, thereby decreasing control complexity while maintaining both refrigeration and freezing functions.
Solution Approach 2:
The single compressor unit is designed to serve multiple functions by compressing refrigerant for both the normal refrigeration circuit and the freezing circuit. This multi-functional design allows the system to adapt to different operating conditions without requiring separate specialized compressors, reducing control efforts while providing versatile cooling capabilities.
2Adaptability or versatility
If a booster system with separate compressors is used, then both refrigeration portions can be served, but system inefficiencies arise due to sensitivity to operating condition changes
Solution Approach 1:
By merging the two compressor functions into a single unit, the system eliminates energy losses associated with coordinating separate compressors and reduces inefficiencies caused by sensitivity to operating condition changes. The integrated design optimizes refrigerant compression across both circuits, improving overall system energy efficiency.
3Temperature
If conventional booster systems are used, then refrigeration and freezing portions can be cooled, but substantial control efforts are necessary due to sensitivity to operating condition changes
Solution Approach 1:
The integration of both refrigeration circuits into a single compressor system simplifies temperature control by eliminating the need for coordinated control of separate compressors. The unified system responds more predictably to operating condition changes, reducing control complexity while maintaining both refrigeration and freezing temperatures.
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 decreases sensitivity to operating condition changes and enhances efficiency by allowing for robust control with reduced energy investment, achieving stable operation and effective cooling performance across varying conditions.
Implementation Method 1
The heat exchanger 20 establishes a heat exchange relationship between the cooling branch bypass conduit 16 and the cooling branch supply conduit 18, i.e. between the refrigerant in the cooling branch bypass conduit 16 and the refrigerant in the cooling branch supply conduit 18
Implementation Method 2
a gaseous refrigerant expansion device (12) and to the liquid refrigerant portion (10) via a liquid refrigerant expansion device (14)
Implementation Method 3
a first compressor unit 4 having three compressors connected in parallel
Data Source
Figure 1
AI summary
A refrigerating system (2) according to exemplary embodiments of the invention comprises a refrigerant circuit having the following elements: a first compressor unit (4), a condenser/gas cooler (6), and a collecting container (10); a normal refrigeration branch coupled between the collecting container (10) and a suction side of the first compressor unit (4), the normal refrigeration branch comprising a first expansion device (22) and a first evaporator (24); and a freezing branch coupled between the collecting container (10) and the suction side of the first compressor unit (4), the freezing branch comprising a second expansion device (26), a second evaporator (28), a second compressor unit (30) and a desuperheating device (32). The refrigerant circuit further comprises refrigerant conduits for connecting said elements and for circulating a refrigerant therethrough.