Structure and method for achieving low-temperature pipeline system pressure oscillation regulation and control
A pipeline system, low temperature technology, applied in the direction of pipe elements, pipes/pipe joints/pipe fittings, mechanical equipment, etc., can solve the problems of increasing the leakage heat loss, harmfulness, liquid level and pressure measurement interference of low temperature pipeline systems, etc. Pressure oscillation, easy to implement, fast control effect
Active Publication Date: 2020-07-17
XI AN JIAOTONG UNIV
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Problems solved by technology
Taconis oscillations in low temperature systems are mostly harmful. On the one hand, Taconis oscillations will greatly increase the heat leakage loss in low temperature piping systems; on the other hand, Taconis oscillations will interfere with processes such as liquid level and pressure measurement in low temperature environments
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[0041] Open the oscillation control module 3, measure and record the average pressure and pressure oscillation in the low-temperature pipeline 2 system; after using different modes of control elements, the control results of the pressure oscillation in the low-temperature pipeline system are as follows: Figure 4 , where the dotted line is the steady state of zero oscillation. The high and low temperature temperature ratio of the low temperature pipeline is 66.7, the inner diameter of the pipeline is 2.85m, the length of the pipeline is 1m, and the temperature gradient is located in the middle of the low temperature pipeline. Choose a different inner diameter ratio (r / r 0 =0.18,0.35,0.53,0.70,0.88,1.23,1.40,1.75,2.11,2.46,2.81,3.16,3.51), the r / r of expansion regulatory element 3.1 0 >1, r / r of shrinkage control element 3.2 0 Figure 5 (a) is the pressure ratio diagram under different inner diameter conditions when the position of the control element is x=0m, Figure 5 (b-e)...
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The invention discloses a structure and method for achieving low-temperature pipeline system pressure oscillation regulation and control. The structure comprises a low-temperature liquid storage tankinternally provided with a low-temperature liquid, a low-temperature pipeline with the open end connected with the low-temperature liquid storage tank and the other end closed is arranged in the low-temperature liquid storage tank, an oscillation regulation and control module for regulating system internal pressure oscillation is installed on the low-temperature pipeline, the low-temperature pipeline is located in a normal-temperature environment, and the low-temperature pipeline and the open end placed at the low-temperature liquid storage tank jointly form temperature gradient distribution in the axial direction of the pipeline, so that pressure oscillation inside the system is induced. According to the structure, the low-temperature pipeline with the open end connected with the low-temperature liquid storage tank and the other end closed is arranged in the low-temperature liquid storage tank, and the oscillation regulation and control module for regulating the system internal pressure oscillation is installed on the low-temperature pipeline so that on one hand, adverse pressure oscillation in a low-temperature pipeline system can be effectively inhibited by regulating the position of the oscillation regulation and control module, on the other hand, the structure is simple, implementation is easy, the requirements of different regulation and control effects can be met, the regulation and control speed is high, and performance is reliable.
Description
technical field [0001] The invention relates to a pipeline pressure regulation structure and method, in particular to a structure and method for realizing pressure oscillation regulation of a low-temperature pipeline system. Background technique [0002] The Taconis oscillator system is the simplest thermal-acoustic oscillator, which consists of a cryogenic liquid tank and a cryogenic piping system. When the open section of the semi-closed piping system is in a low temperature environment and the closed section maintains the ambient temperature, a temperature distribution between the hot and cold ends is formed, and oscillations may occur in the pipe. The driving force for Taconis oscillations is provided by the temperature gradient in the direction of the wall. Taconis oscillations widely exist in cryogenic engineering measurements and cryogenic liquid storage systems. Taconis oscillations in low temperature systems are mostly harmful. On the one hand, Taconis oscillation...
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IPC IPC(8): F16L55/045
CPCF16L55/045
Inventor 胡露露陈慧亓新刘迎文
Owner XI AN JIAOTONG UNIV
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