Supercritical Carbon Dioxide State Monitoring and Control System Based on Infrared Spectrum Characteristic Analysis

Patent metadata

Field	Value
Publication number	US-2022307973-A1
Application number	US-202117368044-A
Country	US
Kind code	A1
Filing date	Jul 6, 2021
Priority date	Mar 26, 2021
Publication date	Sep 29, 2022
Grant date	—

Abstract

A supercritical carbon dioxide state monitoring and control system based on infrared spectrum characteristic analysis. The system includes: a test section for carbon dioxide to pass through; an infrared light source emitting a detection beam to the carbon dioxide passing through the test section; an infrared spectrometer receiving and analyzing the detection beam passing through the carbon dioxide; and a pressure control module controlling pressure of the carbon dioxide at a set value. In addition, the system also includes a temperature control module capable of monitoring and adjusting temperature of the supercritical carbon dioxide. The supercritical carbon dioxide state monitoring and control system may monitor and control a state of the carbon dioxide at an inlet of an apparatus under an actual operation condition in a Brayton cycle system, which improves working performance of the apparatus in the Brayton cycle system, thereby improving overall efficiency of the Brayton cycle system.

First claim

What is claimed is:

1 . A supercritical carbon dioxide state monitoring and control system based on infrared spectrum characteristic analysis, which comprises:
a test section for carbon dioxide to pass through; an infrared light source emitting a detection beam to the carbon dioxide passing through the test section; an infrared spectrometer configured to receive and analyze the detection beam passing through the carbon dioxide; a pressure control module configured to control pressure of the carbon dioxide at a set value; and a temperature control module configured to adjust temperature of the carbon dioxide.

2 . The supercritical carbon dioxide state monitoring and control system based on the infrared spectrum characteristic analysis according to claim 1 , wherein the supercritical carbon dioxide state monitoring and control system is used in a supercritical carbon dioxide Brayton cycle system, and the structural arrangement of the supercritical carbon dioxide Brayton cycle system is selected from the group consisting of: a simple Brayton cycle, a recompression Brayton cycle, a recompression and partial cooling Brayton cycle, a recompression and reheat Brayton cycle, and a recompression and intermediate cooling Brayton cycle.

3 . The supercritical carbon dioxide state monitoring and control system based on the infrared spectrum characteristic analysis according to claim 2 , wherein the supercritical carbon dioxide Brayton cycle system comprises a compressor, the test section being arranged at an inlet of the compressor, and the carbon dioxide passing through the test section enters the compressor.

4 . The supercritical carbon dioxide state monitoring and control system based on the infrared spectrum characteristic analysis according to claim 3 , wherein the test section comprises a tubular component, and a lens monitoring window, which allows the detection beam from the infrared light source to pass through, is arranged on an outer peripheral surface.

5 . The supercritical carbon dioxide state monitoring and control system based on the infrared spectrum characteristic analysis according to claim 3 , further comprising a pressure sensor in communication connection with the pressure control module.

6 . The supercritical carbon dioxide state monitoring and control system based on the infrared spectrum characteristic analysis according to claim 3 , wherein a wavelength range of the detection beam is 1 μm-5 μm.

7 . The supercritical carbon dioxide state monitoring and control system based on the infrared spectrum characteristic analysis according to claim 3 , wherein the pressure control module is configured to control the pressure of the carbon dioxide at the set value by adjusting working pressure of a back pressure valve at an inlet section of the compressor.

8 . The supercritical carbon dioxide state monitoring and control system based on the infrared spectrum characteristic analysis according to claim 2 , wherein the supercritical carbon dioxide Brayton cycle system comprises a precooler, and the temperature control module is configured to adjust the temperature of the carbon dioxide by adjusting power of the precooler.

9 . The supercritical carbon dioxide state monitoring and control system based on the infrared spectrum characteristic analysis according to claim 1 , wherein the infrared spectrometer is configured to obtain actual transmittance by analysis by the infrared spectrometer, or after standardizing a pipeline size.

Assignees

• Univ Zhejiang

Inventors

• Xiao Gang
• Liu Yafei
• Ni Mingjiang
• Cen Kefa

Classifications

• G01N21/3504 Primary

  for analysing gases, e.g. multi-gas analysis · CPC title

• G05D27/02 Primary

  characterised by the use of electric means · CPC title

• G01N2021/3536

  using modulation of pressure or density · CPC title