A Booster System Based on Free Piston Expansion/Compressor-Linear Motor

Abstract

The invention discloses a pressurization system based on free piston expansion / compressor-linear motor. The system mainly consists of four parts, including an excess pressure recycling system, a circuit switching system, a pressurization system and a control system. The pressurization system disclosed by the invention can be used for transforming excess pressure energy in a gas conveying pipeline of a natural gas driven generator set into electric energy and storing the electric energy, simultaneously driving a free piston expansion / compressor to compress air and then respectively supplying the compressed air to a gas charging system of the natural gas driven generator set and a pressure regulation system of the free piston expansion / compressor. In comparison with a current excess pressure driven power generation system which adopts a turbine type machinery as an acting unit, the excess pressure driven power generation system has the advantages of being reliable in work, high in system energy utilization rate and mechanical and electrical integration degree and flexible in regulation on pressure fluctuation of natural gas or pressurized air at the outlet of the expansion / compressor.

Description

technical field [0001] The invention belongs to the field of industrial energy-saving power generation, and in particular relates to a residual pressure boosting system and a control method of a fixed natural gas generating set. Background technique [0002] As a fuel for natural gas generator sets, the inlet pressure of natural gas is much lower than its pipeline delivery pressure. The usual practice is to use a pressure regulator to depressurize it before using it. In the throttling and decompression process, the pressure drop is completely consumed in overcoming the flow resistance, the natural gas does not promote any mechanical work during the flow process, and the pressure energy is not recovered. At present, the mature application field of natural gas pressure energy is basically positioned on the application of turbo expansion mechanism to extract LNG or directly produce cold energy. Compared with the utilization of cooling capacity, there are relatively few thermod...

AI Technical Summary

Problems solved by technology

Compared with the utilization of cold energy, there are relatively few thermodynamic studies and mechatronics studies on the utilization of mechanical power such as natural gas pressure energy power generation, and there is a lack of more systematic solutions.

At the same time, in the case of low power, the unit power generation cost of turbomachinery is high, but the efficiency is reduced, and its speed is too fast. It is necessary to use a high-speed gear reducer, or use a special high-speed generator and high-power frequency converter. , and these are high-tech and high-cost products

In addition, due to the problem of water erosion, turbo machinery is not suitable for low-grade steam or wet steam

Images