Vortex permanent magnet expander and waste heat recovery power generation system using the expander

An expander, permanent magnet technology, applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve the problems of increased working temperature of generators, poor power generation efficiency and thermal efficiency, increased exhaust superheat and condenser load, etc. , to reduce outlet superheat, improve performance and improve cooling efficiency

Active Publication Date: 2019-06-11
HEFEI GENERAL MACHINERY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the development of fully enclosed scroll permanent magnet expanders has the problem of poor power generation efficiency and thermal efficiency. More loss and heat will cause the operating temperature of the generator to rise and exceed the normal operating temperature range. Long-term operation will also accelerate the demagnetization phenomenon
At the same time, this part of loss and heat will also enter the ORC system with the exhaust gas of the expander, which increases the superheat of the exhaust gas and the load of the condenser, thus affecting the thermal efficiency of the system

Method used

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  • Vortex permanent magnet expander and waste heat recovery power generation system using the expander
  • Vortex permanent magnet expander and waste heat recovery power generation system using the expander
  • Vortex permanent magnet expander and waste heat recovery power generation system using the expander

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1 , 2 , 3, a scroll permanent magnet expander, including the movable scroll 102, fixed scroll 103, eccentric shaft 105 and generator 12 arranged in the casing 101, the movable scroll 102 and the fixed scroll The scrolls 103 are interlocked to form the expansion mechanism 11, and the movable scroll 102 is connected to the main shaft of the generator 12 through the eccentric shaft 105, so that the movable scroll 102 can revolve around the center of the fixed scroll 103, and the movable scroll The disk 102 is also provided with a limiting device for preventing the movable scroll 102 from rotating; The center expands outward along the spiral path, and pushes the movable scroll 102 to revolve. The movable scroll 102 drives the main shaft of the generator 12 to rotate through the eccentric shaft 105. The electric energy generated by the generator 12 is used by the load 2; An exhaust port 107 is opened on the top to discharge, and an organic working medium liq...

Embodiment 2

[0036] Such as Figure 4 , 5 As shown, a waste heat recovery power generation system containing the vortex permanent magnet expander includes a condenser 3, a working medium pump 4, an evaporator 5 and the vortex permanent magnet expander 1, and the evaporator 5 The outlet end of the evaporator is connected to the vortex permanent magnetic expander 1, the condenser 3 and the working medium pump 4 in turn through the pipeline, and is connected to the inlet end of the evaporator 5 through the working medium pump 4 to form an organic Rankine cycle. In the organic Rankine cycle, a branch pipe is arranged on the pipeline between the working medium pump 4 and the evaporator 5, and the branch pipe is used as the liquid injection pipeline 10; the liquid injection pipeline and the scroll permanent magnetic expander 1 The organic working medium spray port 8 communicates.

[0037] Preferably, the liquid injection pipeline 10 is also provided with a liquid injection electromagnetic valv...

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Abstract

The invention belongs to the technical field of afterheat utilization, and in particular, relates to a vortex permanent magnet expander. The vortex permanent magnet expander comprises a movable vortex disc, a static vortex disc, an eccentric shaft and a generator arranged in a shell; the center of the static vortex disc is communicated with an intake port; high-pressure gas injected from the intake port can outwards expand along a spiral path from the center of the static vortex disc to push rotation of the movable vortex disc; the movable vortex disc drives a main shaft of the generator to rotate through the eccentric shaft; and the shell is provided with an organic working medium liquid spraying port opposite to the generator. The organic working medium liquid spraying port is added on a machine body of a traditional vortex expander; the organic working medium flash evaporation is formed by huge pressure difference between two ends of the liquid spraying port; the generator temperature in the expander is lowered; the production heat caused by iron loss, copper loss and the like in the generator is shifted away; and the working temperature of the generator is kept in a reasonable range, so that the expansion process of an organic working medium achieves a similar effect to isentropic expansion process, and the effective guarantee for improving the performances of the expander is provided.

Description

technical field [0001] The invention belongs to the technical field of waste heat utilization, and in particular relates to a vortex permanent magnet expander and a waste heat recovery power generation system using the expander. Background technique [0002] The use of Organic Rankine Cycle (ORC) for power generation can efficiently and environmentally friendly convert low-grade energy into high-grade electrical energy, and the research on expansion components is the key to ORC research. The scroll expander is a compact and cheap expansion mechanism, and many researchers choose it as the expansion part of the small ORC system due to its potential superior performance. [0003] At present, the development of fully enclosed scroll permanent magnet expanders has the problem of poor power generation efficiency and thermal efficiency. More loss and heat will cause the generator's operating temperature to rise and exceed the normal operating temperature range, and long-term opera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01C1/02F01C21/00F01C13/00F01C21/06F01C20/00
CPCF01C1/02F01C13/00F01C20/00F01C21/00F01C21/06
Inventor 贾甲杨坤王晓光黄磊钱雪峰宋有强张良霄
Owner HEFEI GENERAL MACHINERY RES INST
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