Supercritical carbon dioxide compressor experiment circulating system

Abstract

The invention provides a supercritical carbon dioxide compressor experiment circulating system which is mainly applied to experiment test of a supercritical carbon dioxide compressor. The system is characterized in that a closed circulating condition is supplied through a compressor testing unit; ladders, served to a compressor main engine shaft end of the compressor testing unit, of an injectingrecovering unit are sealed in a tooth staggering manner, so that gas leaked from the tail end of a mechanical seal can be subjected to single-stage / two-stage injecting and then is recovered into maincurrent circulation; an SCO2 modulating unit is used for supplying a gas source to a circulating system, pressurizing and heating low-temperature liquid carbon dioxide and preparing a supercritical carbon dioxide working medium as a compressor experiment test working medium; a lubricating unit is used for supplying lubricating oil with proper parameters to a compressor main engine and related supporting devices in order to ensure that the compressor and a gear box bearing run normally; and a cooling unit is used for keeping heat balance of the whole circulating system in running. The system is applicable to supercritical working medium type high-pressure closed circulating experiment platform.

Description

technical field [0001] The present invention proposes a supercritical carbon dioxide compressor experimental circulation system, which is mainly used in the experimental testing of supercritical carbon dioxide compressors, including but not limited to axial flow and centrifugal compressors, and can also be extended to supercritical / subcritical A fluid compressor belongs to the field of compressor machinery. Background technique [0002] The compressor (Compressor) is one of the core components of the thermodynamic cycle system. It provides energy for the fluid working medium in the cycle and converts kinetic energy into the pressure energy of the fluid working medium. It is the "heart" of various cycle systems. Its operating efficiency and Stability is the key to the circulatory system. In recent years, supercritical / transcritical carbon dioxide compressors, as the core components of specific chemical cycles, refrigeration cycles, and power cycles, have become a research ho...

AI Technical Summary

Problems solved by technology

In the field of energy and power, most compressors use air as the compressed working fluid, and the corresponding experimental platforms are also mainly open cycle, which is characterized by the fact that the inlet / port of the compressor is directly connected to the atmospheric environment. Compared with the closed cycle, there is no need to design an independent Working medium system, the construction and operation of the test bench are far less difficult than the closed cycle; in the chemical industry, the compressed working medium is mostly chemical products, which requires a closed cycle operating environment, but the inlet pressure of the compressor is relatively low, and the operating state is far away from the critical point , so that the technical challenges it faces in compressor start-up and operation control cannot be compared with the supercritical carbon dioxide compressor experimental platform

[0004] To sum up, the technology of the existing compressor / air compressor test platform cannot meet the technical requirements of the supercritical carbon dioxide compressor test platform, and it is necessary to develop a high-pressure, closed-cycle test platform suitable for supercritical working fluid

Images