Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for implementing isothermal expansion in pneumatic equipment

A pneumatic equipment, isothermal expansion technology, applied in the realization field of thermal expansion, can solve problems such as waste of energy, poor power performance, engine frosting, etc., to achieve the effect of reducing risk, good uniformity, and solving low temperature effectiveness

Inactive Publication Date: 2015-05-13
张钟元
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 2. Poor power performance
[0011] 1. Relevant experimental results show that the use of heat exchange fluid can easily lead to the problem of frosting inside the engine
[0012] 2. Low energy density
[0014] 4. The thermal cycle process is complex
This not only wastes a certain amount of energy, but also reduces the technical economy of the scheme.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for implementing isothermal expansion in pneumatic equipment
  • Method for implementing isothermal expansion in pneumatic equipment
  • Method for implementing isothermal expansion in pneumatic equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] see figure 1 As shown (in the legend, N2 is the work substance, C3H8 is the heat exchange substance; l represents the liquid state, and g represents the gas state), the realization method of the isothermal expansion in this embodiment 1 is: the work substance in the liquid state is exchanged with the heat in the liquid state The substances are injected into the high-pressure heat exchanger together, and the two are vaporized to form a high-pressure mixture. The high-pressure mixture is then fed into a chamber with a movable piston part. The inlet valve is then closed and the chamber is sealed. The mixed gas expands and does work on the piston, and the piston is displaced under the pressure, while the mixed gas tends to cool down. During this process, due to the high boiling point, the heat exchange substance in the mixed gas gradually liquefies and separates from the working substance, and releases a certain amount of heat. The working substance absorbs heat and conti...

Embodiment 2

[0054] In the present embodiment, the selection of work substance and heat exchange substance is the same as in embodiment 1, see figure 2 As shown, the concrete steps in the present embodiment 2 are as follows:

[0055] Inject liquid heat exchange material into the high-pressure heat exchanger, make it vaporize to form high-pressure gaseous heat exchange material, and inject it into the chamber with movable piston parts; at the same time, inject liquid work material into the chamber and high-pressure gaseous heat exchange material mix. The liquid working substance is vaporized, and expands together with the high-pressure gaseous heat-exchanging substance to perform work in a closed chamber. During this process, the heat-exchanging substance liquefies and releases heat. The work-doing substance will absorb heat and continue to expand to do work. Finally, in the second half of the piston's movement, the exhaust valve is opened, and the exhaust gas formed by the liquid heat e...

Embodiment 3

[0057] In the present embodiment, the selection of work substance and heat exchange substance is the same as in embodiment 1, see image 3 As shown, the concrete steps in the present embodiment 3 are as follows:

[0058] The liquid heat exchange substance is injected into the high-pressure heat exchanger to be vaporized to form a high-pressure gaseous heat exchange substance, which is injected into a chamber with a movable piston part containing a certain amount of gaseous work substance. The intake valve of the chamber is closed, the mixed gas acts on the piston, and the piston is displaced under the pressure, and the mixed gas has a tendency to cool down due to expansion. In the process of doing work, the heat exchange substances in the mixed gas are automatically liquefied and separated due to their high boiling point. The work-doing substances in the mixture will absorb heat and continue to expand to do work. Finally, in the second half of the piston's movement, the exha...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for implementing isothermal expansion in pneumatic equipment. The method selects two unreactive substances which are in a gas state under normal temperature and pressure respectively as a work application substance and a heat exchange substance, and the boiling point of the heat exchange substance is higher than that of the work application substance. The method comprises steps as follows: a liquid-state heat exchange substance is injected into a high-pressure heat exchanger to generate the gas-state high-pressure heat exchange substance, the gas-state high-pressure heat exchange substance and the work application substance in a gas state, liquid state or gas / liquid mixed state are injected into the chamber, and the work application substance and the heat exchange substance in the chamber push the piston to apply work and cool down, so that the heat exchange substance is gradually liquefied and emits heat; and finally, in the second semi-cycle motion of the piston, exhaust composed of the liquid-stage heat exchange substance and the gas-state work application substance is discharged out of the chamber. The invention mainly optimizes the thermodynamic cycle process; the isothermal cycle is implemented to enhance the energy utilization efficiency of the aerodynamical equipment for a low-temperature cold source or any other energy source, thereby enhancing the energy density of the aerodynamical equipment.

Description

technical field [0001] The invention relates to the technical field of pneumatic equipment, in particular to a method for realizing isothermal expansion in pneumatic equipment. Background technique [0002] At present, the two leading aerodynamic power device companies in the world are MDI Company of France and Dimen Cryogenic Engine Company of the United States. [0003] The core scheme adopted by MDI is the isobaric circulation drive scheme of compressed air. The main principles of the solution are: [0004] The power source (high-pressure air) is provided by the compressed air bottle, which is fed into the cylinder at an approximately constant pressure to do work, and then the internal energy generated during the depressurization of exhaust gas is recovered through heat exchange, and then the gas is discharged. [0005] This scheme has the following disadvantages: [0006] 1. The energy density of "fuel" is low. Since the energy density of the working substance in the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F01K25/00
Inventor 张钟元
Owner 张钟元