A closed-loop compression characteristic experimental device and method for supercritical carbon dioxide

Abstract

The invention discloses a device and a method applied to experiment of supercritical carbon dioxide closed cycle compression characteristic. The experiment device comprises a data acquisition control system and a supercritical carbon dioxide closed cycle system, wherein the supercritical carbon dioxide circulation system is characterized in that carbon dioxide gas is provided by a carbon dioxide gas storage tank, enters a carbon dioxide circulation pipeline by virtue of a carbon dioxide flow control valve, respectively flows through data measuring instruments such as a pressure gauge, a thermometer, and a carbon dioxide texture analyzer, and flows through a reduced pressure control device and a heat exchanger to complete a supercritical carbon dioxide closed cycle. The heat exchanger is connected with a water circulating pump and a cooling water storage tank by virtue of a cooling water circulating pipeline; a blowing valve is arranged on the front of an inlet of a compressor; an overpressure safety valve is arranged on the back of the pressure gauge behind the compressor; the data acquisition control system is capable of intensively controlling the carbon dioxide flow control valve, the blowing valve, a compressor motor, the water circulating pump, the carbon dioxide texture analyzer and the reduced pressure control device. The experiment device is safe and efficient, and is high in operability and reliable in experiment data.

Description

technical field [0001] The invention relates to an experimental device and method, in particular to an analytical experimental device and method for experimental research on the compression characteristics of a supercritical carbon dioxide closed cycle. Background technique [0002] Pure substances will change states such as liquid, gas, and solid according to the temperature and pressure. When the temperature is higher than a certain value, any large pressure cannot make the pure substance change from the gas phase to the liquid phase, and the temperature at this time is called the critical temperature; and at the critical temperature, the gas can be liquefied at the lowest The pressure is called critical pressure. A liquid whose temperature and pressure are above the critical point is called a supercritical fluid. The physical properties of supercritical fluid have both liquid properties and gas properties. It is basically a gaseous state, but it is different from ordina...

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Problems solved by technology

However, due to the high pressure and temperature of supercritical fluid, most experts and scholars mainly use theoretical analysis and numerical simulation to analyze and study the physical properties of supercritical carbon dioxide closed cycle, and there are no relevant experiments that can be used for teaching and research in colleges and universities. Therefore, there is an urgent need for an analytical experimental device that can be used for experimental research on the compression characteristics of supercritical carbon dioxide closed loop

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