阅读说明：本技术 一种利用昼夜温差为能量源的发电系统 (Power generation system using day and night temperature difference as energy source ) 是由 贾东明 鞠宏艳 秦鹏举 于 2019-11-27 设计创作，主要内容包括：本发明公开了一种利用昼夜温差为能量源的发电系统,包括封闭容器、发电机、液体工质及气体工质；封闭容器内部盛放液体工质及气体工质,液体工质由于重力作用位于封闭容器底部,气体工质部分溶解于液体工质,同时,封闭容器与发电机通过管道连通；昼夜温差导致封闭容器内气体工质在液体工质中的溶解度变化,使两种工质的总体积变化,发电机利用体积变化转化的压强波动发电。本发明能够利用昼夜温差的波动作为能量源发电。(The invention discloses a power generation system using day and night temperature difference as an energy source, which comprises a closed container, a generator, a liquid working medium and a gas working medium; the closed container is internally filled with liquid working media and gas working media, the liquid working media are positioned at the bottom of the closed container under the action of gravity, the gas working media are partially dissolved in the liquid working media, and meanwhile, the closed container is communicated with the generator through a pipeline; the temperature difference between day and night leads to the solubility change of gas working media in the closed container in the liquid working media, so that the total volume of the two working media is changed, and the generator generates power by utilizing the pressure fluctuation converted by the volume change. The invention can utilize the fluctuation of day and night temperature difference as an energy source to generate electricity.)

1. A power generation system using day and night temperature difference as an energy source is characterized by comprising a closed container, a generator, a liquid working medium and a gas working medium;

the closed container is internally filled with a liquid working medium and a gas working medium, the liquid working medium is positioned at the bottom of the closed container under the action of gravity, the gas working medium is partially dissolved in the liquid working medium, and meanwhile, the closed container is communicated with the generator through a pipeline; the temperature difference between day and night leads to the solubility change of gas working media in the closed container in the liquid working media, so that the total volume of the two working media is changed, and the generator generates power by utilizing the pressure fluctuation converted by the volume change.

2. The power generation system using diurnal temperature differences as an energy source of claim 1, wherein the generator employs a variable capacitance generator based on fluid pressure fluctuations.

3. The power generation system using the diurnal temperature difference as the energy source as claimed in claim 1, wherein a plurality of closed containers are connected in series to form a container group, or a plurality of generators are connected in parallel to form a generator group.

Technical Field

The invention relates to the technical field of power generation devices, in particular to a power generation system using day and night temperature difference as an energy source.

Background

In the power generation, the power generation power device is used to convert water energy, heat energy of fossil fuel (coal, oil, natural gas, etc.), nuclear energy, solar energy, wind energy, geothermal energy, ocean energy, etc. into electric energy. The power generation power devices are classified into thermal power devices, hydroelectric power devices, nuclear power devices and other energy power generation power devices according to the types of energy sources. Energy sources such as wind power, solar energy and water power need to be obtained in special environments, and can an energy source be obtained in any region? It has been found that the diurnal temperature difference is a ubiquitous energy source, and if the diurnal temperature difference can be fully utilized to generate electricity, the device should be applicable to various regions, such as remote regions and the like.

The temperature difference is approximately as follows by using the day and night temperature difference as a power generation mode: the temperature change is about 10 ℃ every 12 hours, the energy density is very low, so the volume of energy collection is very large, the energy collection is not cost-effective in economic terms, and the cost of energy collection is too high especially for large power generation equipment. The existing equipment is not suitable for day and night temperature difference power generation, because the temperature difference power generation technologies such as thermocouple power generation and thermal evaporation power generation need large temperature difference, and the temperature difference of 10 ℃ is not enough to enable the equipment to generate power, the invention focuses on weak current such as small-energy power utilization equipment for mobile phone charging, lighting power utilization and the like.

Disclosure of Invention

In view of the above, the present invention provides a power generation system using the diurnal temperature difference as an energy source, which can generate power using the fluctuation of the diurnal temperature difference as an energy source.

The technical scheme adopted by the invention is as follows:

a power generation system using day and night temperature difference as an energy source comprises a closed container, a generator, a liquid working medium and a gas working medium;

the closed container is internally filled with a liquid working medium and a gas working medium, the liquid working medium is positioned at the bottom of the closed container under the action of gravity, the gas working medium is partially dissolved in the liquid working medium, and meanwhile, the closed container is communicated with the generator through a pipeline; the temperature difference between day and night leads to the solubility change of gas working media in the closed container in the liquid working media, so that the total volume of the two working media is changed, and the generator generates power by utilizing the pressure fluctuation converted by the volume change.

Further, the generator adopts a variable capacitance generator based on fluid pressure fluctuation.

Furthermore, a plurality of closed containers are connected in series to form a container group, or a plurality of generators are connected in parallel to form a generator set.

Has the advantages that:

1. the invention can generate electricity by using the fluctuation of the temperature difference between day and night as an energy source, expands the utilization range of a power generation system, is applicable to most regions, meets the requirement of environmental protection, has low cost in the whole life cycle, and can realize unattended power generation.

2. The generator adopts the variable capacitance generator based on the fluid pressure fluctuation, directly utilizes the fluid pressure fluctuation to generate electricity, avoids more energy loss and has high efficiency.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

wherein, 1-closed container, 2-generator, 3-liquid working medium, and 4-gas working medium.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

The embodiment provides a power generation system using day and night temperature difference as an energy source, and as shown in fig. 1, the power generation system comprises a closed container 1, a generator 2, a liquid working medium 3 and a gas working medium 4.

The closed container 1 is internally provided with a liquid working medium 3 and a gas working medium 4, the liquid working medium 3 is positioned at the bottom of the closed container 1 due to the action of gravity, the gas working medium 4 is partially dissolved in the liquid working medium 3, meanwhile, the closed container 1 is communicated with the generator 2 through a pipeline, and the liquid working medium 3 or the gas working medium 4 in the closed container 1 can freely enter and exit.

The generator 2 uses as a power generation device a variable capacitance generator based on fluid pressure fluctuations of ZL201310502919.6, but other power generation devices are not excluded.

The working principle is as follows: when the external temperature rises, the solubility of the gas working medium 4 in the closed container 1 in the liquid working medium 3 changes, the gas in the liquid working medium 3 can be discharged into the gas working medium 4, so that the volume of the gas working medium 4 is increased, and the pressure of the gas working medium 4 is equal to the external pressure, so that the increase of the total volume of the two working media can cause the increase of the liquid working medium 3 or the gas working medium 4 in the generator 2, and the generator 2 generates electricity according to the increase of the total volume of the two working media; when the external temperature is reduced, the gas working medium 4 is adsorbed by the liquid working medium 3, so that the volume of the gas working medium 4 is reduced, the working medium in the generator 2 is reduced, and the power generation can be continued.

The volume of the closed container 1 is set as V, and the volume of the liquid working medium 3 is set as V_yAt a temperature T_LThe volume of the gas working medium 4 is V_qIf V is equal to V_y+V_q. The liquid working medium 3 can be selected from solution with high solubility, such as ammonia water, etc., at temperature T_LLower solubility is β (T)_L) When the temperature rises to T_UWhen the solubility is β (T)_U) Then the gas volume discharged from liquid working substance 3 at this time is (β (T)_U)-β(T_L))·V_yThe volume of the gas itself is increased by the effect of expansion with heat and contraction with cold

Thus theoretically doing work externally

Wherein P is₀Is the pressure of the outside air, which is one atmosphere. When the temperature is from T_UDown to T_LWhen the working medium is expanded, the gas working medium 4 is adsorbed by the liquid working medium 3, the gas volume is reduced due to expansion caused by heat and contraction caused by cold, and the analysis of acting is the same as that of expansion

Therefore, the day and night theory work is 2W, and the efficiency of the power generation system is η, so that the output electric energy of the day and night temperature difference power generation system is 2 η W.

If the electricity is generated once a day and night, the basic parameters of the power generation system are determined, namely the power generation efficiency η is 0.5, the 2 η W is 3600kJ, the gas pressure is 100kPa, and the required gas volume increment is

If ammonia gas is selected as the gas working medium 4 and ammonia water is selected as the liquid working medium 3, the solubility chart is shown in the following table.

Temperature T (. degree. C.)	Solubility β
		0	88.5
10	70
		20	56
30	44.5
		40	34

According to the data in the table, the solubility is reduced by about 10 when the temperature is increased by 10 ℃, and the calculation is carried out according to the temperature, if the difference between the day and night temperature is 10 ℃, the volume of the ammonia water is required to be 3.6m³。

The invention can also adopt a plurality of closed containers 1 to be connected in series to form a closed container group, or a plurality of generators to be connected in parallel to form a generator set.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.