Magnetic suspension ORC unit and control method

The magnetic levitation ORC unit, supported by magnetic bearings and intelligently controlled, solves the problems of mechanical friction and insufficient control system, and achieves efficient and reliable power generation.

CN122106703APending Publication Date: 2026-05-29BEIJING HUAHANG SHENGSHI ENERGY TECH
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Patent Information

Application Number
CN202610401198.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-30
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing organic Rankine cycle generator sets suffer from high mechanical friction power consumption, strong maintenance dependence, poor dynamic adaptability, and lack of coordinated optimization in the control system, resulting in low system efficiency and insufficient reliability.

Method used

A magnetic levitation motor supported by a magnetic levitation bearing is directly connected to the turbine. Combined with a PLC controller and a four-quadrant frequency converter, intelligent adjustment of speed and working fluid flow is achieved through turbine performance curve and superheat closed-loop control, thus constructing a closed organic Rankine cycle loop.

Benefits of technology

It eliminates mechanical friction losses, improves system efficiency, adapts to heat source fluctuations, ensures safe and efficient turbine operation, and enhances power generation efficiency and grid connection stability.

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Abstract

The invention discloses a magnetic suspension ORC unit and a control method, and relates to the technical field of low-temperature waste heat power generation. The unit comprises a magnetic suspension motor, a turbine, an evaporator, a preheater, a condenser, a liquid storage tank, a working medium pump and a control system, the magnetic suspension motor is coaxially and directly connected with the turbine to form an oil-free integrated closed structure; the control system comprises a PLC, a four-quadrant frequency converter, a turbine inlet adjusting valve, a hot gas bypass valve and a sensor assembly. A turbine performance curve and a working medium physical property model are preset in the PLC, and the PLC is configured to calculate the turbine inlet and outlet pressure ratio in real time, inquire the performance curve to determine the optimal rotating speed target value, and control the rotating speed of the magnetic suspension motor to track the target value by adjusting the turbine inlet adjusting valve. The problems that an existing ORC unit is large in mechanical friction loss, high in maintenance cost and low in variable working condition efficiency are solved, and efficient and stable operation of the unit under the wide working condition is achieved through the cooperative control strategy.
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