A test method for the characteristics of a closed cycle centrifugal compressor

A centrifugal compressor and closed-loop technology, applied in the field of compressors, can solve the problems of inability to model the characteristics of the compressor to replace the working medium, and achieve the effects of easy large-scale promotion and utilization, energy saving, and reduction of complexity.

Active Publication Date: 2022-02-15
BEIJING POWER MACHINERY INST
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Problems solved by technology

Obviously, when the turbomachine uses an alternative working fluid, the adiabatic index of the working fluid will change accordingly, and the traditional modeling criterion of the turbomachine will no longer be applicable, so the substitute working fluid cannot be obtained by modeling the experimental data of the turbine characteristics of the air working fluid Compressor Characteristics

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  • A test method for the characteristics of a closed cycle centrifugal compressor
  • A test method for the characteristics of a closed cycle centrifugal compressor

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Embodiment Construction

[0029] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] refer to figure 1 As shown, the closed cycle centrifugal compressor characteristic test device of this embodiment includes: a closed cycle loop formed by being connected to the compressor tester, and an open loop loop connected to the compressor tester; wherein, the closed cycle loop Including an inert mixed gas storage tank, a surge tank, a flow meter, a pressure reducing valve, a heat exchanger, and a gas composition analyzer; an inert mixed gas storage tank, which provides an inert mixed gas working medium, and the inert mixed gas working medium passes through the The pressure regulator box and the flow meter are connected to the air inlet of the compressor tester; the gas after the test is discharged from the...

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Abstract

The invention discloses a method for testing the characteristics of a closed cycle centrifugal compressor. The process is as follows: inject an inert mixed gas into the closed cycle loop, drive a centripetal turbine through the air supplied by an air source, and drive the centripetal turbine coaxially with it. The compressor tester rotates; according to the set working conditions, adjust the speed of the centripetal turbine, so that the open loop enters the speed closed-loop control state; when the airflow parameters at the inlet and outlet of the compressor tester are stable, measure the thermodynamic parameters of the inlet and outlet; By adjusting the rotational speed of the centripetal turbine in the open circulation loop, the compressor tester is simultaneously adjusted to other rotational speeds to be tested, and the measurement and recording of all characteristic line data points are completed in sequence. The invention can realize the matching change of the equivalent flow rate and the equivalent rotational speed of the compressor tester, meet the requirement of variable working conditions in the performance test of the centrifugal compressor, and greatly reduce the adjustment and control difficulty of the performance test of the centrifugal compressor components.

Description

technical field [0001] The invention belongs to the technical field of compressors, and relates to a characteristic test method of a closed-cycle centrifugal compressor using an inert mixed gas as a working medium. Background technique [0002] Currently, including helium, supercritical CO 2 Many gases, such as working fluids, have been used in closed and semi-closed Brayton cycles as substitutes for air or gas. The similarity theory shows that for an ideal gas, the aerodynamic characteristics of the turbine are dimensionless functions of the reduced velocity parameter, the reduced flow parameter, the Reynolds number and the adiabatic exponent. Obviously, when the turbomachine uses alternative working fluid, the adiabatic index of the working fluid will change accordingly, and the traditional modeling criterion of the turbomachine will no longer be applicable, so the substitute working fluid cannot be obtained by modeling the experimental data of the turbine characteristics...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D27/00
CPCF04D27/001
Inventor 秦勇王大磊张希郑振江王正肖尧
Owner BEIJING POWER MACHINERY INST
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