Booster system
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Solution Overview
Problem
Existing booster systems face challenges in maintaining stable final discharge pressure during partial load operations due to interference between pressure and temperature control, leading to unstable density regulation and operational inefficiencies.
Innovation Solution
A booster system with a cooling temperature regulating unit that controls the flow rate of the cooling medium based on the pressure difference between the inlet and outlet pressures of the second compression unit, ensuring the pressure ratio remains within a predetermined range, and adjusts the flow rate only when the outlet pressure significantly deviates from a set value, thereby maintaining stable discharge pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the amount of cooling medium supplied into the cooling unit is regulated to control pump inlet temperature, then the pump inlet temperature can be regulated, but the pump inlet pressure also changes which interferes with the final discharge pressure control
Solution Approach 1:
The system implements feedback control by detecting the final discharge pressure with a pressure detection unit and using this information to regulate the cooling medium flow rate. The control unit adjusts the cooling medium supply based on the detected pressure deviation from target, creating a closed-loop system that maintains stable final discharge pressure while allowing pump inlet temperature regulation.
Solution Approach 2:
The cooling medium flow rate acts as an intermediary parameter that connects temperature control and pressure control functions. By regulating the cooling medium flow rate based on both temperature requirements and pressure feedback, the system coordinates both control objectives without direct interference between them.
2Temperature
If the flow rate of cooling medium is reduced to increase pump inlet temperature, then the pump inlet temperature increases, but the amount of intermediate supercritical fluid flowing toward the pump unit increases which increases pump inlet pressure and interferes with discharge pressure reduction
Solution Approach 1:
The pressure detection unit continuously monitors the final discharge pressure and provides feedback to the control unit. When pump inlet temperature adjustment causes unwanted pressure changes, the feedback mechanism detects the pressure deviation and compensates by adjusting the cooling medium flow rate, thereby maintaining the intended pressure control.
3Temperature
If the flow regulating valve opening degree is reduced to reduce cooling medium flow rate, then the pump inlet temperature increases, but this may prevent the originally intended density regulation of carbon dioxide
Solution Approach 1:
The system uses feedback from the pressure detection unit to monitor the effects of cooling medium flow rate adjustments on the final discharge conditions. The control unit processes this feedback to make precise adjustments that achieve the desired pump inlet temperature while compensating for any adverse effects on carbon dioxide density regulation.
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 configuration prevents interference between pressure and temperature controls, ensuring stable final discharge pressure even during partial load operations, reducing the need for high-pressure components and improving operational reliability and efficiency.
Implementation Method 1
a compression unit configured to compress carbon dioxide to intermediate pressure equal to and higher than critical pressure and lower than target pressure to generate an intermediate supercritical fluid
Implementation Method 2
a cooling unit configured to cool the intermediate supercritical fluid generated by the compression unit to around a critical temperature to generate an intermediate supercritical pressure liquid
Implementation Method 3
a pump unit configured to increase pressure of the intermediate supercritical pressure liquid generated by the cooling unit to target pressure or higher
Data Source
AI summary
A booster system includes: a cooling temperature regulating unit configured to regulate a temperature of an intermediate supercritical pressure liquid cooled and generated by a main cooling unit on upstream of a pump unit according to a flow rate of a supplied cooling medium; and a pressure detection unit configured to detect inlet pressure of the intermediate supercritical pressure liquid on an inlet side of the pump unit and detect outlet pressure of a target supercritical fluid on an outlet side of the pump unit. The cooling temperature regulating unit controls the flow rate of the cooling medium based on a pressure difference between the inlet pressure and the outlet pressure or a pressure ratio between the inlet pressure and the outlet pressure.