A nanofluid device capable of waste heat power generation and a power generation method thereof

Abstract

The application discloses a nanofluid device capable of realizing waste heat power generation, which comprises a device body, and a basic element of the device body is an annular heterojunction nanochannel which is composed of carbon nanotubes and boron nitride tubes with the same pipe diameter and is spliced to form an annular channel, a heterojunction is formed at the spliced position, and nanofluid is encapsulated in the annular heterojunction nanochannel, and the basic element is generated in a laboratory by using micro-nano processing technology. The application further provides a power generation method of the nanofluid device capable of realizing waste heat power generation. The nanofluid device is a closed system, and as long as a heat source is provided, the fluid in the annular channel can continuously circulate and flow, so that continuous power generation is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nanofluid devices, in particular to a nanofluid device capable of waste heat power generation and a power generation method thereof. BACKGROUND

[0002] Since the 21st century, the global energy demand has been growing exponentially. Energy harvesting using nanomaterials or low-dimensional materials is a current research hotspot and an effective way to solve the energy problem. Through theoretical derivation and experimental verification, it is found that nanofluids, including water and its solutions, can generate electric current when flowing over the surface of nanomaterials (such as graphene, carbon nanotubes, and hexagonal boron nitride). The mechanism is that a weak electric coupling is formed between the dipole of a polar liquid and the free carriers (charged substance particles that can move freely) of nanomaterials. When the polar liquid molecules slide over the surface of nanomaterials, their momentum drives the free carriers to move, thereby generating electric current. The nanofluid device designed based on this principle has high power generation efficiency and has a very broad application prospect and potential major economic value in the field of energy harvesting, and is known as the future green power generation technology.

[0003] Existing nanofluid power generation devices are mostly open structures, which require new water flow through the nanochannel at all times and cannot achieve stable power generation efficiency. SUMMARY

[0004] To solve the above existing problems, the present application provides a nanofluid device capable of waste heat power generation and a power generation method thereof. The present application is realized through the following technical solutions.

[0005] A nanofluid device capable of waste heat power generation, comprising a device body.

[0006] The basic element of the device body is a ring-shaped heterojunction nanochannel composed of a ring-shaped channel spliced by carbon nanotubes and boron nitride tubes with the same pipe diameter. The spliced part is a heterojunction, and the ring-shaped heterojunction nanochannel is encapsulated with nanofluids.

[0007] Further, the basic element of the device body is generated in the laboratory using micro-nano processing technology.

[0008] Further, the pipe diameter of the ring-shaped heterojunction nanochannel is 2-10 nm, and the total length is 0.5-10 μm.

[0009] A power generation method using the nanofluid device capable of waste heat power generation as described above, comprising the following steps:

[0010] S1: A heat source is connected to one end of the carbon nanotube of the ring-shaped heterojunction nanochannel, which can be provided by waste heat generated in mechanical operation or by an external electrode sheet. The other end is connected to a cold source. This process is realized by a nanoscale mechanical hand.

[0011] S2: The temperature difference provided by the cold source and the heat source drives the nanofluid in the annular channel to flow in the clockwise direction, thereby driving the free carriers in the carbon nanotube and the boron nitride tube to move, and when the carrier volume accumulates to a certain degree, a stable potential difference is generated on the annular channel, and waste heat power generation is realized.

[0012] The beneficial effects of the present application are:

[0013] 1. The nanofluid device is a closed system, and as long as a heat source is provided, the fluid in the annular channel can continuously circulate, thereby realizing continuous power generation;

[0014] 2. Waste heat generated in mechanical production can be used for power generation, which is energy-saving and environmentally friendly, and the equipment cost is low and easy to realize. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural diagram of the nanofluid device.

[0016] 1. Carbon nanotube; 2. Boron nitride tube; 3. Nanofluid; 4. Heat source; 5. Cold source. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0018] In the description of the embodiments of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation. Therefore, it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0019] In addition, if the terms "horizontal", "vertical", "overhanging" and the like appear, they do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0020] In the description of the embodiments of the present application, "a plurality of" represents at least 2.

[0021] In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly specified and limited, if the terms "arrange", "mount", "connect", "connect" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] Embodiment: A nanofluid device capable of waste heat power generation, comprising a device body;

[0023] The basic element of the device body is a ring-shaped heterojunction nanochannel, which is composed of a carbon nanotube 1 and a boron nitride tube 2 with the same pipe diameter, and the splicing part is a heterojunction. The ring-shaped heterojunction nanochannel encapsulates a nanofluid 3. The basic element can be generated in the laboratory by using micro-nano processing technology;

[0024] The pipe diameter of the ring-shaped heterojunction nanochannel is 2-10 nm, and the total length is 0.5-10 μm.

[0025] A power generation method of a nanofluid device capable of waste heat power generation, comprising the following steps:

[0026] S1: A heat source is connected to one end of the carbon nanotube of the ring-shaped heterojunction nanochannel, which can be provided by waste heat generated in mechanical operation, or can be provided by an external electrode sheet. The other end is connected to a cold source; the process is realized by a nanoscale mechanical hand;

[0027] S2: The temperature difference provided by the cold and hot sources will drive the nanofluid in the ring-shaped channel to flow in the clockwise direction, thereby driving the free carriers in the carbon nanotube and the boron nitride tube to move. When the carrier volume accumulates to a certain extent, a stable potential difference will be generated on the ring-shaped channel, realizing waste heat power generation.

[0028] The working principle of the present application is:

[0029] The device can utilize the waste heat generated in mechanical production to generate electricity;

[0030] Since the heterojunction at the junction of the carbon nanotube and the boron nitride tube has a large thermal resistance, a large and a small temperature difference (the larger one on the carbon nanotube) will be formed on the two tubes after the cold and hot sources are connected; at the nanometer scale, the temperature gradient on the surface of the nanotube will generate a thermal gradient force on the internal water molecules from high temperature to low temperature, and the thermal gradient force is positively correlated with the temperature difference, so the thermal gradient force generated by the carbon nanotube is greater than that generated by the boron nitride tube, thereby pushing the internal fluid to flow clockwise.

[0031] The nanofluid device of the application is a closed system, and the fluid in the annular channel can continuously circulate as long as a heat source is provided, thereby realizing continuous power generation; the waste heat generated in mechanical production can be used for power generation, which is energy-saving and environment-friendly, has low equipment cost and is easy to realize.

[0032] The above describes the application and its embodiments, which are not limited, and the drawings only show one of the embodiments of the application, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired by it, without departing from the purpose of the application, similar structural modes and embodiments can be designed without creativity, which should belong to the protection scope of the application.

Claims

1. A nanofluidic device that enables waste heat power generation, comprising a device body, characterized by: The basic element of the device body is a ring-shaped heterojunction nanochannel, which is composed of carbon nanotubes and boron nitride tubes with the same diameter, and the joint is a heterojunction. The ring-shaped heterojunction nanochannel encapsulates a nanofluid. One end of the carbon nanotube is connected with a heat source, and the heat source is provided by waste heat generated in mechanical operation. The other end of the carbon nanotube is connected with a cold source. The temperature difference between the cold source and the heat source drives the directional flow of the nanofluid in the ring-shaped channel, and drives the movement of free carriers in the carbon nanotube and the boron nitride tube to generate a potential difference.

2. A nanofluidic device capable of waste heat power generation according to claim 1, wherein: The basic element of the device body is generated in the laboratory by using micro-nano processing technology.

3. The nanofluidic device capable of waste heat power generation of claim 1, wherein: The diameter of the ring-shaped heterojunction nanochannel is 2-10 nm, and the total length is 0.5-10 μm.

4. A power generation method using the nanofluid device capable of waste heat power generation according to any one of claims 1 to 3, characterized by, The method comprises the following steps: S1: connecting a heat source to one end of the carbon nanotube in the ring-shaped heterojunction nanochannel by a nanoscale mechanical hand, and connecting a cold source to the other end of the carbon nanotube, wherein the heat source is provided by waste heat generated in mechanical operation; S2: the temperature difference between the cold source and the heat source drives the directional flow of the nanofluid in the ring-shaped channel in the clockwise direction, thereby driving the movement of free carriers in the carbon nanotube and the boron nitride tube. When the carriers accumulate to a certain extent, a stable potential difference will be generated on the ring-shaped channel, realizing waste heat power generation.

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