Combined cooling and heating system based on distributed gallium arsenide concentrating photovoltaic combined heat and power generation

Abstract

The utility model discloses a combined cooling and heating system based on distributed gallium arsenide concentrating photovoltaic combined heat and power generation, which belongs to the technical field of photovoltaic power generation and comprises a plurality of gallium arsenide concentrating photovoltaic modules for converting light energy into electric energy and heat energy. The electric energy is connected to a grid or directly connected with a power consumption load; the heat storage system is used for storing the heat energy, the heat storage system comprises M heat storage tanks coupled with the heat supply system and the heat refrigeration system, M is a natural number larger than 0, the heat storage tanks are filled with heat storage media, the heat storage media comprise one of water, heat conduction oil and molten salt, and the gallium arsenide concentrating photovoltaic module comprises a groove type concentrating photovoltaic module. By the adoption of the technical scheme, power can be efficiently generated, associated heat energy can be stored, energy is provided for a thermal heating system and a thermal refrigerating system through the stored heat energy, and the requirements of different users are met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to photovoltaic power generation technical field, concretely relates to a kind of cold and heat combined supply system based on distributed gallium arsenide light focusing photovoltaic cogeneration. BACKGROUND

[0002] Gallium arsenide light focusing photovoltaic technology is a kind of efficient solar power generation system, it uses the high-efficiency gallium arsenide light focusing cell to realize photovoltaic effect, and effectively converts the energy of solar radiation into electric energy. The core of this photovoltaic power generation system is that it can make full use of inexhaustible and inexhaustible solar energy resources, so as to provide a clean, safe and renewable energy solution. In the process of power generation, the system will not pollute the environment and will not destroy the ecological balance, so it is a green and environmentally friendly energy technology. The core of light focusing photovoltaic technology is to concentrate sunlight into concentrated light beams through a condenser, and to significantly improve the photoelectric conversion efficiency of solar cells by using light focusing effect. By arranging solar cells at the convergence point of light, the required number of solar cells can be significantly reduced, thereby reducing material cost and system volume. Distributed photovoltaic technology can be customized according to the actual needs of users, providing tailor-made photovoltaic application solutions. This distributed power generation method not only provides clean power, but also effectively utilizes associated energy, further improving energy utilization efficiency.

[0003] In contrast, existing combined supply systems mostly rely on fossil fuels such as natural gas or coal as energy input. However, fossil fuels emit a large amount of greenhouse gases during combustion, causing serious pollution to the environment. In addition, the associated heat generated during the power generation process of traditional photovoltaic systems is not effectively utilized, resulting in a large amount of wasted heat energy. Currently, common photovoltaic systems generally use silicon photovoltaic cells, but their power generation efficiency is relatively low, usually only about 20%. The power generation efficiency of gallium arsenide light focusing photovoltaic technology can reach about 40%, which is significantly higher than that of traditional silicon photovoltaic technology. Some gallium arsenide light focusing photovoltaic power generation technologies have already achieved high-efficiency conversion of 1:1 of light and heat. The generated electric energy can not only be self-produced and self-used, but also can be integrated into the power grid to provide clean energy for a wider range of users. In addition, a large amount of associated heat can be stored and utilized, further improving the comprehensive utilization rate of energy. UTILITY MODEL CONTENTS

[0004] The utility model aims to meet the actual demand, provide a kind of cold and heat combined supply system based on distributed gallium arsenide light focusing photovoltaic cogeneration, not only can efficiently generate electricity, but also can store associated heat energy, and then utilize the stored heat energy to provide energy for heating system and refrigeration system, to meet the needs of different users.

[0005] In order to realize the above technical purposes, the utility model discloses a kind of cold and heat combined supply system based on distributed gallium arsenide concentrating photovoltaic cogeneration, comprising:

[0006] A plurality of gallium arsenide concentrating photovoltaic modules convert light energy into electric energy and heat energy;The electric energy is connected to the grid or directly connected to the power consumption load;

[0007] The heat energy is stored in a heat storage system, which includes M heat storage tanks coupled with a heating system and a refrigeration system, where M is a natural number greater than 0, and the heat storage tanks are filled with a heat storage medium.

[0008] Preferably, the heat storage medium includes one of water, heat-conducting oil and molten salt.

[0009] Preferably, the heat storage tank is provided with an insulation layer.

[0010] Preferably, the gallium arsenide concentrating photovoltaic module includes a trough concentrating photovoltaic.

[0011] Preferably, the trough concentrating photovoltaic outlet is connected to the inlet of the heat storage tank through a pipeline.

[0012] Preferably, the heat storage tank is connected to a lithium bromide refrigeration unit, the outlet of the lithium bromide refrigeration unit is connected to a cold load end, and cold energy is supplied to the cold load end.

[0013] Compared with the prior art, the present application has the advantages and positive effects of:

[0014] The utility model not only has the ability of efficient power generation, but also can effectively store the heat energy generated during power generation. In this way, the stored heat energy can be further utilized to provide the required energy for the heating system and the refrigeration system, thereby meeting the diversified needs of different users in different seasons and different environments. Specifically, the utility model adopts a new type of concentrating photovoltaic technology, namely gallium arsenide concentrating photovoltaic technology. The advantage of this technology is first reflected in the cell efficiency. Compared with traditional silicon-based photovoltaic technology, the power generation efficiency of gallium arsenide concentrating photovoltaic technology is significantly higher. This means that in the same photovoltaic arrangement area, gallium arsenide concentrating photovoltaic technology can generate more electric energy, thereby improving the energy utilization efficiency.

[0015] Secondly, the distributed gallium arsenide concentrating photovoltaic technology can be customized according to the actual needs of users and objective conditions. This customized solution can better adapt to different application scenarios, ensuring the efficient operation of the photovoltaic system and the maximization of energy utilization. In addition, the utility model also pays special attention to the centralized collection and utilization of associated heat. In this way, not only is energy wasted, but also the needs of users in winter heating and summer cooling are met. This comprehensive energy utilization method not only improves the utilization rate of energy, but also helps to promote energy saving and emission reduction, which is of great significance to environmental protection and sustainable development. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0017] Fig. 1 The principle block diagram of the preferred embodiment of the present application is shown in the figure.

[0018] Fig. 2 The structure diagram of the trough type concentrating photovoltaic in the preferred embodiment of the present application is shown in the figure.

[0019] Fig. 3 The structure diagram of the secondary light concentration receiver in the preferred embodiment of the present application is shown in the figure.

[0020] Fig. 4 The structure diagram of the heat storage tank in the preferred embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0021] The technical solutions of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0022] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does 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 utility model.

[0023] In the description of the utility model, it needs to be understood that the terms "installation", "connection", "connection" should be understood broadly unless otherwise specified and limited, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0024] As shown in Figs. 1 to 4 The utility model provides a kind of based on distributed gallium arsenide concentrating photovoltaic cogeneration of cold and heat supply system, it is related to several gallium arsenide concentrating photovoltaic modules that can convert light energy into electric energy and heat energy.These modules convert the light energy in sunlight into electric energy and heat energy through efficient energy conversion technology, so as to realize the efficient use of energy.The converted electric energy can be directly connected to the power grid, or directly connected to various power consumption loads, to provide the required power for them.Each gallium arsenide concentrating photovoltaic module includes a trough concentrating photovoltaic support 1, a secondary light focusing receiver 2 and a primary reflector 3;The primary reflector 3 is arc-shaped, and the primary reflector 3 is installed on the trough concentrating photovoltaic support 1, and the trough concentrating photovoltaic support 1 is connected to the secondary light focusing receiver 2 by connecting rod.The secondary light focusing receiver 2 includes a vacuum glass tube 4, and a secondary reflector 5 and a gallium arsenide concentrating solar cell 6 are arranged on the vacuum glass tube 4;

[0025] At the same time, the converted heat energy is effectively stored in a specially designed heat storage system.The heat storage system includes M heat storage tanks, where M is a natural number greater than 0, indicating that the number of heat storage tanks can be adjusted according to actual needs.Each heat storage tank is filled with a specific heat storage medium, which can be one of water, heat conducting oil or molten salt, to ensure efficient storage and release of heat energy.Each heat storage tank includes a tank body 7, and an inlet 8 and an outlet 9 are formed on the tank body 7.

[0026] In order to improve the heat storage efficiency, each heat storage tank is provided with a heat preservation layer to reduce the loss of heat energy. The heat preservation layer can be made of various high-efficiency heat preservation materials to ensure that the temperature in the heat storage tank remains at an ideal state.

[0027] The specific type of gallium arsenide concentrated photovoltaic module includes a trough type concentrated photovoltaic module. The design of the trough type concentrated photovoltaic module allows the outlet to be directly connected to the inlet of the heat storage tank through a pipeline, thereby achieving efficient transmission of heat energy. In this way, the converted heat energy can be quickly stored in the heat storage tank for use when needed.

[0028] The heat storage tank is also connected to a lithium bromide refrigeration unit to achieve further utilization of heat energy. The outlet of the lithium bromide refrigeration unit is connected to the cold load end to provide the required cold energy to the cold load end. This design not only improves the utilization efficiency of energy, but also realizes the comprehensive management of heat and cold energy, further optimizing the energy utilization efficiency of the entire system.

[0029] The utility model discloses on the basis of gallium arsenide concentrated photovoltaic technology, ingeniously integrated heat storage, heat heating and heat refrigeration three subsystems. The operation process of the whole system is a reciprocating process, first, the concentrated photovoltaic system absorbs solar energy from the sun, and converts these absorbed solar energy into electric energy and heat energy. Electric energy can be transmitted to the power grid through grid connection, or directly consumed by load, while the accompanying heat is stored by the heat storage system. The stored heat can not only be used for winter heating, but also be used for summer refrigeration, so as to realize the full utilization of heat energy and achieve the purpose of energy saving and emission reduction. Users can flexibly adjust the temperature of heating and refrigeration according to their actual needs, so that the whole system is more optimized on the basis of clean.

[0030] The utility model discloses based on gallium arsenide concentrated photovoltaic power generation system, makes full use of the photovoltaic effect of solar cell, converts solar radiation into electric energy. Photovoltaic power generation system is a kind of clean, safe and renewable energy. In the process of photovoltaic power generation, it will not pollute the environment and will not destroy the ecological balance. Trough type concentrating technology refers to the light convergence through concentrating mirror, forms concentrated light beam, utilizes concentrating effect, can converge sunlight. Through this concentrating effect, trough type concentrated photovoltaic system can generate higher electric energy output, and generates heat energy according to the proportion of 1:1. Unlike existing traditional photovoltaic system, the traditional photovoltaic system usually directly dissipates the accompanying heat, which will cause a lot of energy loss. The utility model stores the accompanying large amount of heat energy by trough type concentrated photovoltaic system for heat and power cogeneration, further couples heat heating system and heat refrigeration system, and uses the stored heat for winter heating and summer refrigeration. In the process of refrigeration and heating, adjustment mode can be adopted, and users can flexibly adjust the temperature of refrigeration and heating according to their own temperature needs.

[0031] In order to better store heat, the utility model discloses the heat storage sub -system is configured, and the heat storage tank is established to store heat. According to the different photovoltaic heat production temperature, different heat storage medium can be configured. For example, hot water can be used as heat storage medium when 100 DEG C or so, and when the temperature reaches 300 DEG C to 400 DEG C, heat conducting oil or molten salt can be used as heat storage medium. Because the cooling liquid outlet temperature of the concentrating photovoltaic system is relatively low, it is suggested to use hot water as heat storage medium. The hot water flowing out from the concentrating photovoltaic system outlet enters the heat storage tank (insulated water tank) and is stored. According to the different needs of users, the storage time will also be different, so different thicknesses of insulation layer can be used to provide insulation function.

[0032] The heat storage sub -system can be connected with the heat supply and heating sub -system and the heat refrigeration sub -system, and the user can decide whether to configure the heat supply and heating system and the heat refrigeration system according to the needs. The heat storage sub -system is connected with the heat supply and heating sub -system through the heat exchanger, and the heat exchanger is suggested to use the tube -shell heat exchanger, and the heat exchange mode uses the counterflow heat exchange, so that the heat in the heat storage tank can be more fully utilized. The water outlet of the water supply end of the tube -shell heat exchanger can be connected to the area to be heated, and the return water after heating can directly enter the water inlet of the water supply end of the heat exchanger.

[0033] The heat storage sub -system is connected with the lithium bromide refrigeration unit to realize the refrigeration effect. The outlet of the lithium bromide refrigeration unit is connected with the cold load end to supply cold to the cold load end. Taking the configuration of 1MW concentrating photovoltaic in a certain area in southwest as an example, the concentrating photovoltaic power generation efficiency is 40%, and the accompanying heat production is also 40%, and the actual photovoltaic capacity is 1.16MW. The first year power generation is 2701MWh, and the average annual power generation is 2583.1MWh. The heat produced by 1.1MW is stored, and about 1MW of heat can be stored. The stored heat is used for heat supply and heating, and the winter heating is calculated according to 24 hours per day, and about 2165 square meters of office area can be provided with heating. The summer cooling is calculated according to 10 hours per day, and about 1856 square meters of office area can be provided with refrigeration supply.

[0034] The above only is the preferred implementation of the utility model, and it should be pointed out that for ordinary skilled person in the art, on the premise of not departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. A combined cooling and heating system based on distributed GaAs concentrator photovoltaic cogeneration, comprising a plurality of GaAs concentrator photovoltaic modules that convert light energy into electrical energy and thermal energy; the electrical energy is connected to the grid or directly connected to the power consumption load; characterized in that, Also comprising: a heat storage system for storing the heat energy, the heat storage system comprising M heat storage tanks coupled with a heat supply system and a heat refrigeration system, M being a natural number greater than 0, the heat storage tanks being filled with a heat storage medium; Each gallium arsenide concentrated photovoltaic module comprises a trough concentrated photovoltaic support (1), a secondary light focusing receiver (2) and a primary reflector (3); the primary reflector (3) is arc-shaped, the primary reflector (3) is installed on the trough concentrated photovoltaic support (1), the trough concentrated photovoltaic support (1) is connected with the secondary light focusing receiver (2) through a connecting rod; the secondary light focusing receiver (2) comprises a vacuum glass tube (4), a secondary reflector (5) and a gallium arsenide concentrated photovoltaic cell (6) are arranged on the vacuum glass tube (4).

2. The distributed gallium arsenide-based concentrating photovoltaic combined heat and power system of claim 1, wherein, The heat storage medium is one of water, heat-conducting oil and molten salt.

3. The distributed gallium arsenide-based concentrating photovoltaic combined heat and power system of claim 1, wherein, The heat storage tank is provided with a heat preservation layer.

4. The distributed gallium arsenide-based concentrating photovoltaic combined heat and power system of claim 1, wherein: The outlet of the trough concentrated photovoltaic module is connected with the inlet of the heat storage tank through a pipeline.

5. The distributed gallium arsenide-based concentrating photovoltaic combined heat and power system of claim 1, wherein: The heat storage tank is connected with a lithium bromide refrigerating unit, the outlet of the lithium bromide refrigerating unit is connected with a cold load end, and the lithium bromide refrigerating unit supplies cold to the cold load end.

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