CO2 Refrigeration Pressure Control With Bypass Valve and Parallel Compressor
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Solution Overview
Problem
Traditional pressure control mechanisms in CO2 refrigeration systems are inefficient, leading to wasted energy and suboptimal performance, as they struggle to effectively manage pressure within the system.
Innovation Solution
A system incorporating a pressure sensor, a gas bypass valve, and a parallel compressor, controlled by a controller that adjusts the pressure within a receiving tank based on measured pressure and refrigerant flow rate or temperature, using both the gas bypass valve and parallel compressor to regulate pressure efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional pressure control mechanisms are used, then the system structure is simple, but energy efficiency deteriorates and system performance becomes suboptimal
Solution Approach 1:
The pressure control function is segmented into multiple independent components: a gas bypass valve for pressure regulation and a parallel compressor for active pressure management. This segmentation allows each component to perform its specific function efficiently, improving overall energy efficiency while maintaining manageable system complexity through modular design.
Solution Approach 2:
The parallel compressor serves multiple functions: it acts as both a backup compressor and an active pressure control device. By integrating pressure control functionality into the compressor system, the invention eliminates the need for separate pressure control equipment, thereby improving energy efficiency without proportionally increasing system complexity.
2Productivity
If pressure control is not optimized, then the system operation is simple, but energy consumption increases and performance deteriorates
Solution Approach 1:
The system implements feedback control by continuously monitoring pressure conditions and dynamically adjusting the operation of the gas bypass valve and parallel compressor. This feedback mechanism ensures optimal pressure control, improving system performance while minimizing energy consumption through responsive, condition-based operation rather than continuous full-power operation.
Solution Approach 2:
The pressure control system operates dynamically by adjusting the opening degree of the gas bypass valve and the operation status of the parallel compressor based on real-time pressure conditions. This dynamic operation allows the system to maintain high performance while reducing energy consumption by adapting to varying operational demands rather than operating at fixed settings.
3Use of energy by moving object
If a parallel compressor and gas bypass valve are used for pressure control, then energy efficiency improves, but device complexity increases
Solution Approach 1:
The parallel compressor is designed to serve dual purposes: as a backup compressor for system redundancy and as an active pressure control device. This multi-functionality justifies the addition of components by eliminating the need for separate pressure control equipment, thereby improving energy efficiency without proportionally increasing overall system complexity.
Solution Approach 2:
The invention merges the pressure control function with the existing compressor system by introducing a parallel compressor and gas bypass valve configuration. This merging approach integrates pressure regulation into the refrigeration cycle itself, allowing the new components to work synergistically with existing system elements rather than adding independent, isolated 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 solution enhances the energy efficiency and performance of the CO2 refrigeration system by precisely controlling pressure, reducing energy consumption and improving overall system operation.
Implementation Method 1
The pressure sensor is configured to measure a pressure within a receiving tank of the CO2 refrigeration system
Implementation Method 2
The gas bypass valve is fluidly connected with an outlet of the receiving tank and arranged in series with a compressor
Implementation Method 3
The parallel compressor is fluidly connected with the outlet of the receiving tank and arranged in parallel with both the gas bypass valve and the compressor
Implementation Method 4
evaporated to provide cooling by absorbing heat into the refrigerant
Implementation Method 5
cooled/condensed to a lower temperature state (e.g., in a gas cooler or condenser which absorbs heat from the refrigerant)
Data Source
AI summary
Systems and methods for controlling pressure in a CO2 refrigeration system are provided. The pressure control system includes a pressure sensor, a gas bypass valve, a parallel compressor, and a controller. The pressure sensor is configured to measure a pressure within a receiving tank of the CO2 refrigeration system. The gas bypass valve is fluidly connected with an outlet of the receiving tank and arranged in series with a compressor of the CO2 refrigeration system. The parallel compressor is fluidly connected with the outlet of the receiving tank and arranged in parallel with both the gas bypass valve and the compressor of the CO2 refrigeration system. The controller is configured to receive a pressure measurement from the pressure sensor and operate both the gas bypass valve and the parallel compressor, in response to the pressure measurement, to control the pressure within the receiving tank.