Deep sea power output system based on supercritical Rankine cycle

Abstract

The invention discloses a deep sea power output system based on a supercritical Rankine cycle, and belongs to the field of deep sea power output. A deep sea power output system based on a supercritical Rankine cycle comprises a submersible body. The turbine is connected into the submersible body, and an output shaft on the turbine penetrates through a shell of the submersible body and is connectedwith a driving impeller; the electric heating type supercritical pressure boiler is connected into the submersible body; the system utilizes electric energy to obtain a high-temperature heat source;deep sea cold water is used as a low-temperature heat source; meanwhile, the turbine is used for directly outputting shaft work to the outside; in the Rankine cycle, pure water or an organic working medium is used as a working fluid, and the inlet pressure of the turbine and the deep sea water pressure are balanced under the supercritical working condition, so that the shaft sealing problem of thepower output shaft of the turbine is solved, and the new technology provided by the invention avoids the application defects of the traditional deep sea power output device.

Description

technical field [0001] The invention relates to the technical field of deep-sea power output, in particular to a deep-sea power output system based on a supercritical Rankine cycle. Background technique [0002] Deep water detector is a kind of intelligent underwater equipment, which is generally deployed in the water within hundreds to thousands of meters through underwater submersibles. use. [0003] The deep-sea power output device currently used is mainly a deep-sea motor. In order to prevent high-pressure seawater from invading the motor, the deep-sea motor adopts an oil-immersed structure and is supplemented by a pressure feedback device. The inside of the motor and the pressure feedback device are filled with hydraulic oil. The inside of the motor and the pressure feedback When the pressure feedback device is connected with the deep-sea seawater pressure, the pressure feedback device will be deformed accordingly, and finally the internal and external pressure of the ...

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Problems solved by technology

[0004] However, there are insurmountable defects in the operation of deep-sea motors. Deep-sea motors are powered remotely by shore-based or offshore platforms. Since the transmission lines are usually long, high-voltage transmission is used to reduce energy consumption along the lines; in actual operation, High-voltage direct current and high-voltage alternating current are used for power transmission. During the power transmission process, the following defects will occur: On the one hand, deep-sea motors that use high-voltage direct current transmission need to be connected to a DC converter, which requires high costs, and the DC converter needs to be placed in the Underwater, the reliability is poor; on the other hand, the stability of deep-sea motors using high-voltage AC transmission is poor, and the starting current of the motor can usually reach 5-7 times the normal operating current. Waves can also cause voltage overload on transmission lines; these defects greatly limit the application of deep sea motors

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