Supercritical carbon dioxide turbine device capable of adapting to large-range back pressure and flow

A carbon dioxide and turbine device technology, which is applied to steam engine devices, non-electric variable control, and simultaneous control of multiple variables. Efficiency, the effect of achieving adaptation

Active Publication Date: 2016-09-14
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In turbine installations, variable operating conditions (changes in flow and back pressure) will reduce the operating efficiency of the turbine, and may even lead to safety accidents

Method used

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  • Supercritical carbon dioxide turbine device capable of adapting to large-range back pressure and flow
  • Supercritical carbon dioxide turbine device capable of adapting to large-range back pressure and flow
  • Supercritical carbon dioxide turbine device capable of adapting to large-range back pressure and flow

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with accompanying drawing.

[0027] refer to figure 1 and image 3 , the present invention is a supercritical carbon dioxide turbine device that can adapt to a wide range of back pressure and flow, including an inlet guide volute 1, a flow test and flow control system 2, a nozzle ring 3, an impeller 4, and a back pressure test and diffuser Controller control system 5. Wherein, the inlet of the guide volute 1 is provided with a supercritical carbon dioxide working medium inlet. When the device is running, the working fluid passes through the flow sensor at the inlet of the guide volute, and the flow sensor measures the flow value of the supercritical carbon dioxide working medium and converts it into The electrical signal is transmitted to the data acquisition card, and the data acquisition card is connected to the computer flow control device for analysis and processing. The device can convert the fl...

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Abstract

The invention discloses a supercritical carbon dioxide turbine device capable of adapting to large-range back pressure and flow. A guiding volute inlet is provided with a flow testing and through-flow control system. High-temperature and high-pressure supercritical carbon dioxide working media pass through a guiding volute and then enter a nozzle ring to expand. The large head arc blade profile insensitive to the attack angle is adopted in the nozzle blade molded line, a device capable of adjusting the through-flow area is additionally arranged, the oblique angle of nozzle blades is adaptively adjusted through electric signals of a flow sensor, the through-flow area is changed, and therefore the supercritical carbon dioxide turbine device can adapt to the large-range flow work condition. When the working media enter an impeller, the internal energy and kinetic energy of the working media are converted into mechanical work to be output. An impeller outlet is provided with a back pressure testing and pressure expander control system. A variable geometric parameter self-adaption back pressure expander is adjusted through electric signals of a back pressure sensor, accordingly, the supercritical carbon dioxide turbine device adapts to large-range back pressure, and the turbine running efficiency is improved. The supercritical carbon dioxide turbine device has the beneficial effects that the supercritical carbon dioxide turbine device can adapt to the large-range back pressure and flow work conditions, the pneumatic efficiency is high, the self adaptability is high, the running cost is obviously reduced, and wide market prospects are achieved.

Description

Technical field: [0001] The invention relates to a centripetal turbine device, in particular to a supercritical carbon dioxide turbine device capable of adapting to a wide range of back pressure and flow. Background technique: [0002] In turbine installations, variable operating conditions (changes in flow rate and back pressure) will reduce the operating efficiency of the turbine, and may even lead to safety accidents. At present, domestic and foreign countries have begun to develop the elliptical large-head arc profile suitable for the leading edge of the centripetal turbine nozzle of the micro gas turbine. Both can reduce flow separation and maintain high efficiency. At the same time, the application of the adjustable flow area device to the centripetal turbine can change the flow area of ​​the nozzle in real time according to the flow condition, which not only avoids the blowing loss caused by part of the air intake, but also further improves the adaptability of the fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K7/32F01D9/02G05D27/02
CPCG05D27/02F01D9/02F01K7/32
Inventor 张荻王雨琦谢永慧
Owner XI AN JIAOTONG UNIV
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