CN107120151B - A self-circulating waste heat utilization system based on pressure power generation - Google Patents

Abstract

The invention relates to the field of pressure power generation, and discloses a self-circulation waste heat utilization system based on pressure power generation, which comprises the following components: the device comprises a first generator, a second generator, a first reversing valve, a second reversing valve, a hot fluid supply unit, a cold fluid supply unit, a film shell, a cooler, a liquid reservoir and an electric power output circuit. The invention can utilize the waste heat or the waste heat to raise the pressure of the fluid, so that the compression pressure power generation body of the fluid is deformed and then converted into electric energy, and the waste heat are recycled.

Description

A self-circulating waste heat utilization system based on pressure power generation

technical field

The invention relates to the technical field of pressure power generation, in particular to a self-circulating waste heat utilization system based on pressure power generation.

Background technique

Waste heat and waste heat exist in large quantities in the process of life and production. How to reuse waste heat and waste heat is of great significance for improving energy utilization.

At present, the main forms of waste heat and waste heat utilization include waste heat cogeneration, hot water supply, and refrigeration. Studies have shown that when the piezoelectric body is subjected to force in certain directions and causes deformation, an equal amount of positive and negative charges will appear on the two surfaces of the piezoelectric body. At present, there are very few researches and applications on pressure power generation, and there are only a few reports on the use of pressure power generation in people's pedal pressure power generation and automobile road pressure power generation. Therefore, how to use waste heat to supercharge and then convert it into electrical energy is a new form of energy conversion, which is of great significance for energy saving and emission reduction.

Contents of the invention

(1) Technical problems to be solved

The purpose of the present invention is to provide a self-circulating waste heat utilization system based on pressure power generation, which uses waste heat or waste heat to increase the pressure of the fluid so that it can compress the pressure generating body to generate deformation and then convert it into electric energy, so as to realize the recovery and utilization of waste heat and waste heat .

(2) Technical solutions

In order to solve the above technical problems, the present invention provides a self-circulating waste heat utilization system based on pressure power generation, which includes: a first generator, a second generator, a first reversing valve, a second reversing valve, and a thermal fluid supply unit , cold fluid supply unit, membrane shell, cooler, liquid reservoir and power output circuit;

The first generator and the second generator are respectively provided with four interfaces, the first interface of the first generator is connected to the outlet of the thermal fluid supply unit through the first reversing valve, and the first generator The second interface of the device is connected to the inlet of the thermal fluid supply unit through a second reversing valve;

The thermal fluid supply unit provides thermal fluid to the first generator or the second generator by heating the fluid with waste heat or waste heat;

The first interface of the second generator is connected to the outlet of the cold fluid supply unit through a first reversing valve, and the second interface of the second generator is connected to the outlet of the cold fluid supply unit through a second reversing valve. The inlet connection of the cold fluid supply unit is used to provide cold fluid for the second generator or the first generator;

The membrane shell is provided with a pressure generator, and a plurality of membrane shells with built-in pressure generators are arranged side by side to form a group. There is a channel between two adjacent membrane shells, and the inlet end of the channel enters the pipeline through the fluid. respectively connected to the third interface of the first generator and the third interface of the second generator, the outlet end of the channel is connected to the inlet of the liquid reservoir through a fluid outflow pipeline, and the outlet of the liquid reservoir The outlet is connected to the fourth interface of the first generator through the first fluid branch, and the outlet of the liquid reservoir is connected to the fourth interface of the second generator through the second fluid branch;

Both ends of the plurality of pressure generators are connected by wires and collectively connected to the power output circuit;

A cooler is provided on the fluid outflow pipeline, a first regulating valve is provided between the cooler and the channel outlet, a second regulating valve is provided between the cooler and the liquid reservoir, and the A third regulating valve is provided on the second fluid branch, a fourth regulating valve is provided on the first fluid branch, a fifth regulating valve is provided on the fluid inlet pipeline between the entrance of the channel and the first generator, A sixth regulating valve is provided on the fluid inlet pipeline between the inlet of the channel and the second generator;

The pressure of the first generator and the second generator is used to compress the pressure generating body, and the cooler is used to cool and release the pressure generating body to complete the compression deformation and recovery of the pressure generating body, thereby generating The electrical energy is output by the electrical output circuit.

Wherein, the heat fluid supply unit is provided with waste heat or waste heat pipes and heat exchange pipes, the heat exchange pipes perform heat exchange with the waste heat or waste heat pipes, and provide heat fluid to the system through the heat exchange pipes.

Wherein, a thermal fluid circulation pump is provided on the pipeline between the thermal fluid supply unit and the second reversing valve.

Wherein, the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve and the sixth regulating valve are all electromagnetic valves.

Wherein, the piezoelectric power generating body is made of a piezoelectric power generating material.

Wherein, the first reversing valve and the second reversing valve are both four-way reversing valves.

(3) Beneficial effects

Compared with the prior art, the present invention has the following advantages:

The present invention provides a self-circulating waste heat utilization system based on pressure power generation. By controlling the opening and closing of the solenoid valve, and under the control of the reversing valve, the heating and cooling fluids flow through the two generators in sequence to ensure that one generator Maintain high pressure, another generator maintains low pressure, use the high-pressure generator to complete the compression deformation of the pressure generator, and realize the cooling and pressure release of the fluid under the action of the cooler to restore the deformation of the pressure generator; in the membrane shell and its built-in During the pressurization and decompression process of the pressure generator, the pressure deformation of the pressure generator generates electric energy and is output by the power output circuit, so as to realize the recovery and utilization of waste heat or waste heat, and the circulation of the power generation cycle working fluid is stable. External power supply is required. The two generators operate alternately in turn to ensure the continuous operation of the system cycle.

Description of drawings

Fig. 1 is a connection schematic diagram of a self-circulating waste heat utilization system based on pressure power generation in the present invention;

In the figure: 1. Pressure generating body; 2. Membrane shell; 3. First solenoid valve; 4. Cooler; 5. Second solenoid valve; 6. Liquid reservoir; 7. Third solenoid valve; 8. Fourth Solenoid valve; 9. First generator; 10. Second generator; 11. Fifth solenoid valve; 12. Sixth solenoid valve; 13. Thermal fluid supply unit; 131: Waste heat or waste heat pipe; 132: Heat exchange tube ; 14, the first reversing valve; 15, the second reversing valve; 16, the power output circuit; 17, the thermal fluid circulation pump; 18, the first fluid branch; 19, the second fluid branch; 20, the fluid enters Pipeline; 21. Fluid outflow pipeline.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying Describes, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention depending on the specific circumstances.

In addition, in the description of the present invention, unless otherwise specified, the meanings of "plurality", "multiple roots" and "multiple groups" are two or more.

As shown in Figure 1, a self-circulating waste heat utilization system based on pressure power generation provided by an embodiment of the present invention includes: a first generator 9, a second generator 10, a first reversing valve 14, a second reversing valve To the valve 15, the hot fluid supply unit 13, the cold fluid supply unit, the membrane shell 2, the cooler 4, the liquid reservoir 6 and the power output circuit 16;

The first generator 9 and the second generator 10 are respectively provided with four interfaces, the first interface of the first generator 9 is connected to the outlet of the thermal fluid supply unit 13 through the first reversing valve 14, The second interface of the first generator 9 is connected to the inlet of the thermal fluid supply unit 13 through a second reversing valve 15;

The hot fluid supply unit 13 provides hot fluid for the first generator 9 or the second generator 10 by heating the fluid with waste heat or waste heat;

The first interface of the second generator 10 is connected to the outlet of the cold fluid supply unit through a first reversing valve 14, and the second interface of the second generator 10 is connected to the outlet of the cold fluid supply unit through a second reversing valve 15. The inlet connection of the cold fluid supply unit, the cold fluid supply unit is used to provide cold fluid for the second generator 10 or the first generator 9, wherein, through the first reversing valve 14 and the second reversing valve 15 Reversing, so that the working medium in the second generator 10 and the first generator 9 are exchanged; in the embodiment of the present invention, the first reversing valve and the second reversing valve are both four-way reversing valves;

The membrane shell 2 is provided with a pressure generator 1, and a plurality of membrane shells 2 with built-in pressure generators 1 are arranged side by side to form a group. There is a channel between two adjacent membrane shells 2, and the inlet end of the channel is Connect with the third interface of the first generator 9 and the third interface of the second generator 10 respectively through the fluid inlet pipeline 20, and the outlet end of the channel is connected with the liquid reservoir 6 through the fluid outlet pipeline 21 The outlet of the liquid reservoir 6 is connected to the fourth interface of the first generator 9 through the first fluid branch 18, and the outlet of the liquid reservoir 6 is connected to the fourth interface of the first generator 9 through the second fluid branch 19. The fourth interface of the second generator 10 is connected; the pipeline between the thermal fluid supply unit 13 and the second reversing valve 15 is provided with a thermal fluid circulation pump 17;

Both ends of the plurality of pressure generators 1 are connected to the power output circuit 16 through wires, and the electric energy is transmitted to the power output circuit 16 through wires;

A cooler 4 is provided on the fluid outflow pipeline 21, a first regulating valve is provided between the cooler 4 and the outlet of the channel, and a second regulating valve is provided between the cooler 4 and the liquid reservoir 6. Two regulating valves, the second fluid branch 19 is provided with a third regulating valve, the first fluid branch 18 is provided with a fourth regulating valve, the inlet between the channel and the first generator 9 A fifth regulating valve is arranged on the fluid inlet pipeline 20, and a sixth regulating valve is arranged on the fluid inlet pipeline 20 between the inlet of the channel and the second generator 10;

The pressure of the first generator 9 and the second generator 10 is used to compress the piezoelectric generator 1, and the cooler 4 is used to cool and release the pressure of the medium in the piezoelectric generator 1, so as to complete the compression of the piezoelectric generator 1. 1 compression deformation and restoration, thereby generating electric energy and outputting it from the electric power output circuit 16 . When the system is running, first keep the fifth solenoid valve 11 open, the sixth solenoid valve 12, the first solenoid valve 3, the fourth solenoid valve 8, and the third solenoid valve 7 are closed, and the heating fluid enters the first solenoid valve through the first reversing valve 14. Generator 9, the cold fluid enters the second generator 10 through the first reversing valve 14. The pressures of the working fluid in the first generator 9 and the second generator 10 are raised by heating and lowered by cooling respectively. When the pressure in the first generator 9 rises to the maximum and stabilizes, the pressure generating body 1 in the membrane shell 2 is compressed and deformed, at this time, the first electromagnetic valve 3 is opened, and the second electromagnetic valve 5 is kept closed. Under the action of 4, the pressure in the first generator 9 is reduced to the minimum, and the pressure generating body 1 resumes deformation. At this time, the pressure of the second generator 10 decreases under the action of the cold fluid, the third solenoid valve 7 is opened, the working fluid in the liquid reservoir 6 enters the second generator 10, and the third solenoid valve 7 is closed after the pressure is balanced. Then the second solenoid valve 5 is opened, and the working fluid in the cooler 4 enters the liquid reservoir 6 until the pressure is balanced. For the heating and cooling fluid circuit, the heating fluid flows out of the first generator 9 , through the second reversing valve 15 and then through the thermal fluid circulation pump 17 through the thermal fluid supply unit 13 into the first reversing valve 14 . The cold fluid then flows out of the second generator 10 and passes through the second reversing valve 15 to continue being cooled. While closing the third solenoid valve 7 with pressure balance between the liquid reservoir 6 and the second generator 10, close the first solenoid valve 3 and open the second solenoid valve 5, the working fluid in the cooler 4 enters the liquid reservoir 6 and Close the second solenoid valve 5 after the pressure is balanced. While closing the third solenoid valve 7, it is also necessary to close the fifth solenoid valve 11, open the sixth solenoid valve 12, switch the first reversing valve 14 and the second reversing valve 15, so that the heating fluid and the cooling fluid flow through the second reversing valve respectively. Two generators 10 and the first generator 9, the pressure in the first generator 9 decreases, the pressure in the second generator 10 increases, and then the working fluid pressure in the second generator 10 is used to compress the membrane shell 2 The pressure generators 1 inside operate alternately in sequence. During the pressure and release process of the membrane shell 2 and its built-in pressure generator 1, the pressure deformation of the pressure generator 1 generates electric energy and is output by the power output circuit 16; the first generator 9, the second The generators 10 operate alternately in sequence. When the first generator 9 boosts the pressure, the second generator 10 is cooled by the cooling water and depressurized. When the pressure drops below the pressure in the liquid reservoir, the working medium in the liquid reservoir enters The second generator 10 thus ensures the continuation of the cycle. The recovery and utilization of waste heat or waste heat is realized, and the flow of the expansion/compression fluid depends on the pressure difference in the system to complete the cycle, and there is no need to provide additional mechanical circulation equipment.

Specifically, the thermal fluid supply unit 13 is provided with a waste heat or waste heat pipe 131 and a heat exchange pipe 132, and the heat exchange pipe 132 performs heat exchange with the waste heat or waste heat pipe 131, and the heat exchange pipe 132 provides the The system provides thermal fluid.

In order to facilitate automatic control, the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve and the sixth regulating valve may all be electromagnetic valves.

Wherein, the piezoelectric generator 1 may be made of piezoelectric generator materials, such as piezoelectric ceramics.

It can be seen from the above embodiments that the present invention can use waste heat or waste heat to increase the pressure of the fluid, so that the compression pressure generating body can be deformed and then converted into electric energy, so as to realize the recovery and utilization of waste heat and waste heat.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (6)

1. A self-circulating waste heat utilization system based on pressure power generation, characterized by comprising: the device comprises a first generator, a second generator, a hot fluid supply unit, a cold fluid supply unit, a film shell, a cooler, a liquid reservoir and an electric power output circuit;

the first generator and the second generator are respectively provided with four interfaces, the first interface of the first generator is connected with the outlet of the hot fluid supply unit through a first reversing valve, and the second interface of the first generator is connected with the inlet of the hot fluid supply unit through a second reversing valve;

the hot fluid supply unit heats fluid through waste heat and provides hot fluid for the first generator or the second generator;

the first interface of the second generator is connected with the outlet of the cold fluid supply unit through a first reversing valve, the second interface of the second generator is connected with the inlet of the cold fluid supply unit through a second reversing valve, and the cold fluid supply unit is used for providing cold fluid for the second generator or the first generator;

the pressure generating bodies are arranged in the membrane shells, the membrane shells with the pressure generating bodies arranged in parallel form a group, a channel is reserved between two adjacent membrane shells, the inlet end of the channel is respectively connected with the third interface of the first generator and the third interface of the second generator through a fluid inlet pipeline, the outlet end of the channel is connected with the inlet of the liquid storage device through a fluid outflow pipeline, the outlet of the liquid storage device is connected with the fourth interface of the first generator through a first fluid branch, and the outlet of the liquid storage device is connected with the fourth interface of the second generator through a second fluid branch;

both ends of the pressure generators are connected through wires and are connected to the power output circuit in a summarizing way;

a cooler is arranged on the fluid outflow pipeline, a first regulating valve is arranged between the cooler and the outlet of the channel, a second regulating valve is arranged between the cooler and the liquid storage device, a third regulating valve is arranged on the second fluid branch, a fourth regulating valve is arranged on the first fluid branch, a fifth regulating valve is arranged on the fluid inlet pipeline between the inlet of the channel and the first generator, and a sixth regulating valve is arranged on the fluid inlet pipeline between the inlet of the channel and the second generator;

the pressure of the first generator and the pressure of the second generator are used for compressing the pressure power generation body, the cooler is used for cooling and releasing the pressure power generation body so as to complete compression deformation and recovery of the pressure power generation body, and electric energy is generated and output by the electric power output circuit;

the first generator and the second generator are operated alternately in turn, when the first generator is boosted, the second generator is cooled by cooling water to reduce the pressure, and when the pressure is reduced to be smaller than the pressure in the liquid storage device, the working medium in the liquid storage device enters the second generator, so that the continuous circulation is ensured.

2. The self-circulation waste heat utilization system based on pressure power generation according to claim 1, wherein the hot fluid supply unit is provided with a waste heat pipe and a heat exchange pipe, the heat exchange pipe exchanges heat with the waste heat pipe, and the hot fluid is supplied to the system through the heat exchange pipe.

3. The self-circulation waste heat utilization system based on pressure power generation according to claim 1, wherein a thermal fluid circulation pump is provided on a pipe line between the thermal fluid supply unit and the second reversing valve.

4. The pressure power generation-based self-circulation waste heat utilization system according to claim 1, wherein the first, second, third, fourth, fifth and sixth regulating valves are solenoid valves.

5. The self-circulating waste heat utilization system of pressure-based power generation of claim 1, wherein the pressure power generator is made of a pressure power generation material.

6. The pressure power generation-based self-circulation waste heat utilization system of claim 1, wherein the first reversing valve and the second reversing valve are four-way reversing valves.

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