Liquid nitrogen energy storage device

Abstract

The utility model relates to a liquid nitrogen energy storage device which comprises a liquid nitrogen storage tank, a heat exchanger, a compressor, a condenser, a nitrogen making device and a controller, the liquid nitrogen storage tank is of a double-layer structure, the inner layer is a liquid nitrogen storage cavity, and the outer layer is a vacuum heat insulation layer, so that the evaporation loss of liquid nitrogen is reduced to the maximum extent; the heat exchanger is communicated with the liquid nitrogen storage tank through a first pipeline, when liquid nitrogen needs to be released, the control system controls the heat exchanger to heat the liquid nitrogen so that the liquid nitrogen can be converted into a gas state from a liquid state, and the liquid nitrogen is conveyed to a needed place through the pipeline; and the working states of the compressor and the condenser are controlled, and liquid nitrogen in the liquid nitrogen storage tank is supplemented in time, so that the technical effects of high efficiency and energy conservation are achieved, and relatively high sustainability is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage technical field, concretely is a kind of liquid nitrogen energy storage device. BACKGROUND

[0002] Liquid nitrogen refers to liquid nitrogen, liquid nitrogen is inert, colorless, odorless, non-corrosive, non-combustible, temperature extremely low liquid, vaporization when a large amount of heat absorption contact causes frostbite, with the continuous growth of global energy demand and the improvement of environmental protection consciousness, efficient, environmentally friendly energy storage technology is more and more people's attention, traditional energy storage mode such as battery, gas has the problems such as low energy density, environmental pollution, and liquid nitrogen as a kind of clean, efficient energy storage medium, has huge application potential.

[0003] Liquid nitrogen needs to be outputted by liquid nitrogen storage tank when using, but there is a large temperature difference between liquid nitrogen storage tank and external environment, inevitably exchanges heat with external environment, causes part of low-temperature liquid nitrogen in the container inside liquid nitrogen storage tank to evaporate easily.

[0004] Based on this, the utility model provides a kind of liquid nitrogen energy storage device to solve the problem that low-temperature liquid nitrogen in the above-mentioned liquid nitrogen storage tank evaporates easily. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of liquid nitrogen energy storage device to solve the technical problem that low-temperature liquid nitrogen in the above-mentioned background technique is evaporated easily.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A kind of liquid nitrogen energy storage device, comprising:

[0008] Liquid nitrogen storage tank, heat exchanger, compressor, condenser, nitrogen making device and controller, the compressor, the condenser, the nitrogen making device are all arranged on the side of the liquid nitrogen storage tank, and the compressor, the condenser, the nitrogen making device and the liquid nitrogen storage tank are sequentially communicated, the heat exchanger is arranged on the other side of the liquid nitrogen storage tank and is communicated with the liquid nitrogen storage tank, and the controller is used to control the liquid nitrogen storage tank;The liquid nitrogen storage tank includes liquid nitrogen storage cavity and vacuum insulation layer, and the liquid nitrogen storage cavity is arranged inside the vacuum insulation layer.

[0009] As a kind of liquid nitrogen energy storage device preferred scheme, the heat exchanger is communicated with the liquid nitrogen storage tank by first pipeline, the heat exchanger is also communicated with output pipeline, first control valve is arranged on the first pipeline, and second control valve is arranged on the output pipeline.

[0010] As a preferred scheme of the liquid nitrogen energy storage device, the compressor is connected with the condenser through a second pipeline.

[0011] As a preferred scheme of the liquid nitrogen energy storage device, the condenser is connected with the liquid nitrogen storage tank through a third pipeline, and a third control valve is arranged on the third pipeline.

[0012] As a preferred scheme of the liquid nitrogen energy storage device, the nitrogen making device is connected with the compressor through a fourth pipeline, and a fourth control valve is arranged on the fourth pipeline.

[0013] It can be seen from the technical scheme of the liquid nitrogen energy storage device that, compared with the prior art, the liquid nitrogen energy storage device has the beneficial effects that:

[0014] By adopting the double-layer structure for the liquid nitrogen storage tank, the inner layer is a liquid nitrogen storage cavity, and the outer layer is a vacuum insulation layer, so that the evaporation loss of the liquid nitrogen is minimized; the heat exchanger is connected with the liquid nitrogen storage tank through a first pipeline; when the liquid nitrogen needs to be released, the control system controls the heat exchanger to heat the liquid nitrogen, so that the liquid nitrogen is converted from the liquid state to the gaseous state, and is delivered to the required place through the pipeline; the control system can also control the working states of the compressor and the condenser according to the amount of the liquid nitrogen in the liquid nitrogen storage tank, so as to supplement the liquid nitrogen in the liquid nitrogen storage tank in time, thereby achieving the technical effect of high efficiency and energy saving, and having strong sustainability. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 FIG. 1 is a whole schematic view of a liquid nitrogen energy storage device according to an embodiment of the present application;

[0016] Fig. 2 FIG. 2 is a sectional view of a liquid nitrogen storage tank of the liquid nitrogen energy storage device according to the embodiment of the present application;

[0017] In the figure, 1 is a liquid nitrogen storage tank; 11 is a liquid nitrogen storage cavity; 12 is a vacuum insulation layer; 2 is a heat exchanger; 21 is a first pipeline; 211 is a first control valve; 22 is an output pipeline; 221 is a second control valve; 3 is a compressor; 31 is a second pipeline; 4 is a condenser; 41 is a third pipeline; 411 is a third control valve; 5 is a nitrogen making device; 51 is a fourth pipeline; and 511 is a fourth control valve. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0019] It should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0020] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0021] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0022] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the drawings and specific embodiments of the specification.

[0023] Please refer to Figs. 1-2 The embodiment of the present application provides a liquid nitrogen energy storage device, comprising: a liquid nitrogen storage tank 1, a heat exchanger 2, a compressor 3, a condenser 4, a nitrogen making device 5 and a controller, the compressor 3, the condenser 4, the nitrogen making device 5 are arranged on one side of the liquid nitrogen storage tank 1, and the compressor 3, the condenser 4, the nitrogen making device 5 and the liquid nitrogen storage tank 1 are communicated in sequence, the heat exchanger 2 is arranged on the other side of the liquid nitrogen storage tank 1 and communicated with the liquid nitrogen storage tank 1, and the controller is used for controlling the liquid nitrogen storage tank 1; the liquid nitrogen storage tank 1 comprises a liquid nitrogen storage cavity 11 and a vacuum insulation layer 12, and the liquid nitrogen storage cavity 11 is arranged in the interior of the vacuum insulation layer 12.

[0024] Working principle and effect: the liquid nitrogen storage tank 1 is used for storing liquid nitrogen, the liquid nitrogen storage tank 1 adopts double-layer structure, the inner layer is liquid nitrogen storage cavity 11, and the outer layer is vacuum heat insulation layer 12, so that the evaporation loss of liquid nitrogen is minimized, and the evaporation loss of liquid nitrogen is reduced; the heat exchanger 2 is connected with the liquid nitrogen storage tank 1 through the pipeline, and is used for heat exchange between the liquid nitrogen storage tank 1 and the external environment; the compressor 3 is used for compressing gaseous nitrogen into liquid nitrogen and sending into the condenser 4 for condensation; the nitrogen making device 5 is used for preparing nitrogen;

[0025] Further, the operation state of the whole device can be controlled by the controller, including the storage, release, supplement and other processes of liquid nitrogen, when liquid nitrogen needs to be released, the controller controls the heat exchanger 2 to heat the liquid nitrogen, so that it changes from liquid state to gaseous state, and is transported to the place where it is needed through the pipeline, at the same time, the controller can control the working state of the compressor 3 and the condenser 4 according to the amount of liquid nitrogen in the liquid nitrogen storage tank 1, and supplement the liquid nitrogen in the liquid nitrogen storage tank 1 in time.

[0026] In one embodiment, the heat exchanger 2 is connected with the liquid nitrogen storage tank 1 through the first pipeline 21, the heat exchanger 2 is also connected with the output pipeline 22, the first control valve 211 is arranged on the first pipeline 21, and the second control valve 221 is arranged on the output pipeline 22; the first control valve 211 is used for controlling the flow of liquid nitrogen in the first pipeline 21, so that the liquid nitrogen does not flow out of the heat exchanger 2 when it is not necessary to heat exchange; the output pipeline 22 is a pipeline for outputting liquid nitrogen to the outside, and the second control valve 221 is used for controlling the flow of liquid nitrogen in the output pipeline 22.

[0027] Further, the heat exchanger 2 is preferably an air temperature type vaporizer, after the low-temperature nitrogen gas enters the air temperature type vaporizer, the low-temperature evaporation gas exchanges heat with water vapor in the air temperature type vaporizer, which causes the low-temperature evaporation gas to exchange heat with water vapor in the air temperature type vaporizer, which causes the air temperature type vaporizer to frost, and the frost will form a heat insulation layer to a certain extent, but since the air temperature type vaporizer is configured to be larger, the temperature of the air temperature type vaporizer can generally be maintained at a temperature difference of about 10 DEG C with the ambient temperature, which can meet the actual use requirements of normal temperature nitrogen gas.

[0028] In one embodiment, the compressor 3 is connected with the condenser 4 through the second pipeline 31, and the second pipeline 31 is used for sending liquid nitrogen into the condenser 4 for condensation.

[0029] In one embodiment, the condenser 4 is connected with the liquid nitrogen storage tank 1 through the third pipeline 41, and the third control valve 411 is arranged on the third pipeline 41; the third control valve 411 is used for controlling the flow of liquid nitrogen in the third pipeline 41, so that the liquid nitrogen does not flow into the liquid nitrogen storage tank 1 during the cooling process.

[0030] In one embodiment, the nitrogen production device 5 is connected with the compressor 3 through a fourth pipeline 51, and a fourth control valve 511 is arranged on the fourth pipeline 51, and the fourth control valve 511 is used for controlling the flow of nitrogen in the fourth pipeline 51, so as to avoid the flow of nitrogen into the condenser 4 when the liquid nitrogen is not needed to be supplemented.

[0031] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A liquid nitrogen energy storage device, characterized by, Include: Liquid nitrogen storage tank (1), heat exchanger (2), compressor (3), condenser (4), nitrogen making device (5) and controller; The compressor (3), the condenser (4), the nitrogen making device (5) are all arranged on one side of the liquid nitrogen storage tank (1), and the compressor (3), the condenser (4), the nitrogen making device (5) and the liquid nitrogen storage tank (1) are sequentially communicated, the heat exchanger (2) is arranged on the other side of the liquid nitrogen storage tank (1) and is communicated with the liquid nitrogen storage tank (1), and the controller is used for controlling the liquid nitrogen storage tank (1); The liquid nitrogen storage tank (1) comprises a liquid nitrogen storage cavity (11) and a vacuum insulation layer (12), and the liquid nitrogen storage cavity (11) is arranged in the vacuum insulation layer (12).

2. The liquid nitrogen energy storage device of claim 1, wherein: The heat exchanger (2) is communicated with the liquid nitrogen storage tank (1) through a first pipeline (21), the heat exchanger (2) is also communicated with an output pipeline (22), a first control valve (211) is arranged on the first pipeline (21), and a second control valve (221) is arranged on the output pipeline (22).

3. The liquid nitrogen energy storage device of claim 1, wherein: The compressor (3) is communicated with the condenser (4) through a second pipeline (31).

4. The liquid nitrogen energy storage device of claim 1, wherein: The condenser (4) is communicated with the liquid nitrogen storage tank (1) through a third pipeline (41), and a third control valve (411) is arranged on the third pipeline (41).

5. The liquid nitrogen energy storage device of claim 1, wherein: The nitrogen making device (5) is communicated with the compressor (3) through a fourth pipeline (51), and a fourth control valve (511) is arranged on the fourth pipeline (51).

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