What is the working principle of EPS Pre-expander machine

- 2022-01-10 -

About EPS Pre-expander machine:


What is the working principle of EPS Pre-expander machine?


When the gas has a certain pressure and temperature, it has the potential energy embodied by the pressure and the kinetic energy embodied by the temperature. These two kinds of energy are collectively referred to as internal energy.

EPS Pre-expander machine

The main function of the EPS Pre-expander machine is to use the gas to perform adiabatic expansion in the EPS Pre-expander machine to do external work to consume the internal energy of the gas itself, so that the pressure and temperature of the gas are greatly reduced to achieve the purpose of refrigeration and cooling.


The main work of the EPS Pre-expander machine is done in the nozzle and the impeller. When the high-speed, low-temperature gas passes through the impeller channel, the gas speed drops rapidly due to the high-speed rotation of the impeller. At the same time, when the gas flows in the increasingly larger channel, the internal energy of the gas is reduced due to the decrease of pressure and speed, and the gas temperature is further greatly reduced, so as to achieve the purpose of cooling and refrigeration. Due to the rapid rotation of the impeller of the EPS Pre-expander machine, the impeller of the compressor on the other end of the same shaft as the impeller of the EPS Pre-expander machine is driven to rotate. It not only compresses the gas, but also utilizes the power emitted by the EPS Pre-expander machine, and controls the rotation speed of the EPS Pre-expander machine at the same time.


Compared with piston expander, EPS Pre-expander machine has the characteristics of large flow, simple structure, small volume, high efficiency and long operation period, and is suitable for large and medium-sized cryogenic equipment.


About Wanlong Machinery:


Hangzhou Fuyang Wanlong Machinery Co., Ltd established in 1997, is a professional high-tech EPS (Expandable polystyrene) machinery & Mould manufacturer integrating R & D, production, sales and service. We have strong product design and innovation capabilities, with more than 10 of the provincial high-tech products, the invention patent, utility model and appearance design patent etc. In addition, we passed the certifications of quality management system ISO9001, the products has with high efficiency, low energy consumption, stability, durability, easy maintenance, etc.


For more product information links about cutting machines, you can click on the link below.

1. Polystyrene cutting machine

2. EPS cutting machine

3. Cutting machine for insulation block

4. EPS block cutting machine

5. Expandable polystyrene cutting machine

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