CN218955189U - A solar combined heat, power and cooling system - Google Patents

Abstract

The utility model discloses a solar thermoelectric cold combined supply system which comprises a photovoltaic power generation plate, an air source cold and hot water unit, a first energy storage water tank, a second energy storage water tank, a fan coil, an electric heater, a controller, an electric three-way valve, a first circulating pump, a second circulating pump, a grid-connected inverter, a first ammeter, a second ammeter, a distribution box, a data collector and a domestic hot water supply pipe. The solar energy, the air energy and the energy storage are combined, so that the defects of fluctuation, intermittence and the like of the photovoltaic power generation are overcome, the stability of a power grid is improved, the near digestion of the distributed photovoltaic power generation is realized, the requirements of clean energy heating, refrigerating and domestic hot water of a building are met, the economic burden of a user can be reduced, and the economical efficiency of the distributed photovoltaic power generation is improved.

Description

A solar combined heat, power and cooling system

technical field

The utility model relates to the technical field of new energy sources, in particular to a combined solar heat, power and cooling system.

Background technique

Building energy accounts for 46% of my country's total social energy consumption. The use of new energy to replace petrochemical energy is one of the important means to achieve the "double carbon target". Solar energy is one of the most widely used energy types in new energy. Using solar energy for storage Thermal energy storage can solve the problem of energy storage in solar thermal power generation. With the grid connection of a large number of distributed photovoltaic power generation, the power grid cannot be accommodated, which affects the security of the power grid. Due to the volatility and intermittent nature of photovoltaic power generation technology itself, it will have a greater impact on the power grid, and it is urgent to configure distribution Type energy storage equipment for peak regulation.

Most parts of northern my country are relatively cold in winter, and building heating consumes a lot of energy. Heating in winter consumes a lot of petrochemical energy, and produces smog, which affects air quality. Due to the large power consumption of the traditional "coal-to-electricity" transformation, the economic burden on users is relatively large, causing some users to abandon electricity and return to coal. At the same time, the northern region is rich in solar radiation resources, which is suitable for the promotion of photovoltaic power generation. A technology is needed that can not only meet the local consumption of distributed photovoltaic power generation, but also meet the needs of clean energy for heating, cooling and domestic hot water in buildings, and can reduce the The economic burden of users, improve the economy of distributed photovoltaic power generation system.

Utility model content

The purpose of this utility model is to provide a solar heat, power and cooling cogeneration system, which combines solar energy, air energy and energy storage, overcomes the shortcomings of photovoltaic power generation such as volatility and intermittency, improves the stability of the power grid, and realizes distribution The nearby consumption of distributed photovoltaic power generation meets the needs of clean energy heating, cooling and domestic hot water for buildings, and can reduce the economic burden of users and improve the economics of distributed photovoltaic power generation.

In order to achieve the above purpose, the utility model provides a solar heat, power and cooling cogeneration system, including a photovoltaic power generation panel, an air source cold and hot water unit, a first energy storage water tank, a second energy storage water tank, a fan coil unit, and an electric heater , controller, electric three-way valve, first circulating pump, second circulating pump, grid-connected inverter, first electric meter, second electric meter, distribution box, data collector and domestic hot water supply pipe;

The electric heater is built in the bottom of the second energy storage tank, the input end of the distribution box is connected to the line between the first electric meter and the second electric meter, and the output end of the electric distribution box is respectively connected to the air source cold and hot water unit , the controller is electrically connected, the grid-connected inverter, the first electric meter, and the second electric meter are connected in sequence, the second electric meter is connected to the mains grid, and the data collector is respectively connected to the grid-connected inverter, the second electric meter One electric meter, the second electric meter.

Preferably, the second energy storage water tank is provided with a heat exchange coil, and the second energy storage water tank is provided with a water temperature and level sensor and an electromagnetic water supply valve.

Preferably, the second circulation pump, the electric heater, the electromagnetic water supply valve, and the water temperature and level sensor are all electrically connected to the controller.

Preferably, the inlet end of the electric three-way valve is connected to the outlet of the air source chiller and hot water unit through a pipeline, and its outlet end is respectively connected to the inlet end of the fan coil and the inlet end of the heat exchange coil through pipelines.

Preferably, the first ammeter is a one-way ammeter, and the second ammeter is a two-way ammeter.

Preferably, the first circulating pump is arranged on the pipeline between the first energy storage water tank and the air source chiller and hot water unit, and an expansion tank is arranged on the pipeline between the first energy storage water tank and the first energy storage tank , the first circulating pump is connected with the air source chiller and hot water unit through a cable.

Preferably, the outlet of the second circulating pump is connected to a domestic hot water supply pipe.

The utility model adopts the beneficial effect of the above-mentioned solar energy heating, electricity and cooling combined supply system as follows:

(1) The security of the power grid is improved by setting up the solar heat, power and cooling cogeneration system and utilizing the local consumption of distributed photovoltaic power generation.

(2) By setting up the first energy storage water tank and the second energy storage water tank, through energy storage, the "peak shifting and valley filling" of the power grid is realized, and the stability of the system is improved.

(3) Through the installation of air source cold and hot water units and electric heaters, the building's clean energy heating in winter, cooling in summer, and domestic hot water in four seasons are realized, which increases the adaptability of the system, reduces the economic burden of users, and improves the distributed photovoltaic system. Economics of power generation.

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

Description of drawings

Fig. 1 is the structural representation of a kind of solar heat-electricity-cold cogeneration system of the present utility model;

Fig. 2 is an enlarged schematic diagram of an electric three-way valve in a solar combined heating, power and cooling system of the present invention.

reference sign

1. Photovoltaic power generation panel; 2. Air source cold and hot water unit; 3. The first energy storage water tank; 4. The second energy storage water tank; 5. Fan coil unit; 6. Electric heater; 7. Controller; 8. Electric three-way valve; 9. First circulation pump; 10. Second circulation pump; 11. Grid-connected inverter; 12. First electric meter; 13. Second electric meter; 14. Distribution box; 15. Water temperature and water level sensor ; 16. Electromagnetic water supply valve; 17. Expansion water tank; 18. Data collector; 19. Mains grid; 20. Domestic hot water supply pipe.

Detailed ways

The technical solution of the utility model is further described below by means of the accompanying drawings and embodiments.

Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by those skilled in the art to which the present invention belongs. "First", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right" and so on are only used to indicate the relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

As shown in the figure, a solar combined heat, power and cooling system includes a photovoltaic power generation panel 1, an air source cold and hot water unit 2, a first energy storage water tank 3, a second energy storage water tank 4, a fan coil unit 5, and an electric heater 6. Controller 7, electric three-way valve 8, first circulating pump 9, second circulating pump 10, grid-connected inverter 11, first electric meter 12, second electric meter 13, distribution box 14, data collector 18 And domestic hot water supply pipe 20. In this system, the first energy storage water tank 3, the second energy storage water tank 4, the fan coil unit 5, the electric heater 6, the controller 7, the electric three-way valve 8, the first circulation pump 9, the second circulation pump 10, data The collector 18 and the domestic hot water supply pipe 20 are located indoors, and the photovoltaic power generation panel 1 , the air source cooling and heating unit 2 , the grid-connected inverter 11 , the first electric meter 12 , the second electric meter 13 and the distribution box 14 are located outdoors.

The photovoltaic power generation panel 1 absorbs solar energy and converts it into electric energy, the air source cold and hot water unit 2 can heat or cool water, and the controller 7 controls the electrical connection of the system. The grid-connected inverter 11 is a special inverter. In addition to converting direct current into alternating current, the output alternating current can be synchronized with the frequency and phase of the mains power, and the output alternating current can be returned to the mains. The data collector 18 is a terminal computer device that integrates a barcode scanning device, RFID technology and a data terminal with a battery and can be operated offline. It has the functions of real-time collection, automatic storage, real-time display, real-time feedback, automatic processing, and automatic transmission.

The electric heater 6 is built in the bottom of the second energy storage water tank 4 . The second energy storage water tank 4 is provided with a heat exchange coil. The second energy storage water tank 4 is provided with a water temperature and level sensor 15 and an electromagnetic water supply valve 16 . The heat exchange coil heats the hot water in the second energy storage water tank 4 through heat exchange.

The input end of the distribution box 14 is connected to the line between the first electric meter 12 and the second electric meter 13, and the grid-connected inverter 11, the first electric meter 12, and the second electric meter 13 are connected in sequence, and the first electric meter 12 is a one-way electric meter. Used to record photovoltaic power generation, the second ammeter 13 is connected to the mains grid 19. The second ammeter 13 is a two-way meter that can record both the electricity supplied to the mains grid 19 and the electricity purchased from the mains grid 19. The data collector 18 is respectively connected to the grid-connected inverter 11 , the first electric meter 12 , and the second electric meter 13 . The data collector 18 is connected with the above-mentioned equipment to provide real-time monitoring of the working status of the photovoltaic power generation system, and the user can grasp the operating data through the mobile terminal.

The second circulation pump 10 , the electric heater 6 , the electromagnetic water supply valve 16 , and the water temperature and water level sensor 15 are all electrically connected with the controller 7 . The controller 7 detects the water tank temperature and water level by detecting the signal of the water temperature and water level sensor 15. When the water level is insufficient, the electromagnetic water supply valve 16 is controlled by the signal line to open to replenish the second energy storage water tank 4.

The inlet end of the electric three-way valve 8 is connected to the outlet of the air source cold and hot water unit 2 through a pipeline, and its outlet end is respectively connected to the inlet end of the fan coil 5 and the inlet end of the heat exchange coil through a pipeline. The air source cold and hot water unit 2 heats or cools the water, and the heated or cooled water enters the fan coil unit 5 through the electric three-way valve 8, and the fan coil unit 5 satisfies the heating or cooling demand of the building through heat dissipation or convection.

The output end of the distribution box 14 is electrically connected to the air source cold and hot water unit 2 and the controller 7 respectively, and the first circulation pump 9 is arranged on the pipeline between the first energy storage water tank 3 and the air source cold and hot water unit 2 , The distribution box 14 drives the air source cooling and hot water unit 2 to heat or cool through cables, and the first circulation pump 9 circulates low-temperature cold water to the air source cooling and hot water unit 2 . The pipeline between the first circulation pump 9 and the first energy storage water tank 3 is provided with an expansion tank 17, which can replenish water for the heating system. The first circulation pump 9 is connected to the air source cold and hot water unit 2 through a cable.

The outlet of the second circulation pump 10 is connected with the domestic hot water supply pipe 20 . When the building needs domestic hot water, the controller 7 starts the second circulating pump 10 to deliver the domestic hot water to the end of use.

The main technological process of the present utility model is as follows:

(1) Heating and domestic hot water supply in winter

Power generation and heating: when the solar irradiance is strong, the photovoltaic power generation panel 1 works, and enters the grid-connected inverter 11 through the confluence device, and a part of the electric energy is transmitted to the mains grid 19 through the first electric meter 12 and the second electric meter 13, Part of the electric energy enters the distribution box 14, and the distribution box 14 drives the air source cooling and hot water unit 2 to heat through the cable, and the first circulation pump 9 circulates the low-temperature cold water to the air source cooling and heating unit 2, and the heated hot water Through the A port of the electric three-way valve 8 (the B port is closed), it enters the fan coil unit 5, and the fan coil unit 5 satisfies the heating demand of the building through heat dissipation.

An expansion water tank 17 is arranged on the pipeline between the first circulation pump 9 and the first energy storage water tank 3 to replenish water for the heating system. Wherein, the first electric meter 12 is a one-way electric meter, which is used to record the amount of photovoltaic power generation; The data collector 18 provides real-time monitoring of the working status of photovoltaic power generation by connecting the above-mentioned devices, and the user can grasp the operation data through the mobile terminal.

Energy storage: while heating, the electric energy generated when the solar irradiance is good is used to store heat through the first energy storage water tank 3 to meet the heating demand at night or in rainy days.

Domestic hot water: the first circulation pump 9 passes the hot water generated by the air-source cold and hot water unit 2 through the B port of the electric three-way valve 8 (the A port is closed), and enters the built-in heat exchange plate of the second energy storage water tank 4 The hot water in the second energy storage water tank 4 is heated and stored through the heat exchange coil. When the building needs domestic hot water, the controller 7 starts the second circulating pump 10 to deliver the domestic hot water to the end of use. The controller 7 detects the water tank temperature and water level by detecting the signal of the water temperature and water level sensor 15. When the water level is insufficient, the electromagnetic water supply valve 16 is controlled by the signal line to open to replenish the second energy storage water tank 4.

(2) Refrigeration and domestic hot water supply in summer

Power generation and cooling: when the solar irradiance is strong, the photovoltaic power generation panel 1 works, and enters the grid-connected inverter 11 through the confluence device, and a part of the electric energy is transmitted to the mains grid 19 through the first electric meter 12 and the second electric meter 13, Part of the electric energy enters the distribution box 14, and the distribution box 14 drives the air source cooling and hot water unit 2 to cool through cables. Port A of the three-way valve 8 (port B is closed) enters the fan coil 5, and the fan coil 5 meets the cooling demand of the building through convection.

An expansion water tank 17 is arranged on the pipeline between the first circulation pump 9 and the first energy storage water tank 3 to replenish water for the refrigeration system. Wherein, the first electric meter 12 is a one-way electric meter, which is used to record the amount of photovoltaic power generation; The data collector 18 provides real-time monitoring of the working status of photovoltaic power generation by connecting the above-mentioned devices, and the user can grasp the operation data through the mobile terminal.

Energy storage: while cooling, the electric energy generated when the solar irradiance is good is used to store cold through the first energy storage water tank 3 to meet the cooling demand at night or in rainy days.

Domestic hot water: by turning on the electric heater 6 connected to the distribution box 14, the electric heater 6 heats the hot water in the second energy storage tank 4 and stores it. When the building needs domestic hot water, the controller 7 starts the second circulating pump 10 to deliver the domestic hot water to the end of use. The controller 7 detects the water tank temperature and water level by detecting the signal of the water temperature and water level sensor 15. When the water level is insufficient, the electromagnetic water supply valve 16 is controlled by the signal line to open to replenish the second energy storage water tank 4.

(3) Domestic hot water supply in spring and autumn

By turning on the electric heater 6 connected to the distribution box 14, the electric heater 6 heats the hot water in the second energy storage tank 4 and stores it. When the building needs domestic hot water, the controller 7 starts the second circulating pump 10 to deliver the domestic hot water to the end of use. The controller 7 detects the temperature and water level of the water tank by detecting the signal of the water temperature and water level sensor 15. When the water level is insufficient, the water supply electromagnetic valve 16 is controlled by the signal line to open to replenish the second energy storage water tank 4.

Therefore, the utility model adopts the above-mentioned solar heating, power and cooling cogeneration system, combining solar energy, air energy and energy storage, which overcomes the shortcomings of photovoltaic power generation such as volatility and intermittency, improves the stability of the power grid, and realizes distribution The nearby consumption of distributed photovoltaic power generation meets the needs of clean energy heating, cooling and domestic hot water for buildings, and can reduce the economic burden of users and improve the economics of distributed photovoltaic power generation.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: It is still possible to make modifications or equivalent replacements to the technical solutions of the present utility model, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present utility model.

Claims (7)

1. A solar combined heat, power and cooling system, characterized in that: it includes a photovoltaic power generation panel, an air source cold and hot water unit, a first energy storage water tank, a second energy storage water tank, a fan coil unit, an electric heater, a controller, Electric three-way valve, first circulating pump, second circulating pump, grid-connected inverter, first electric meter, second electric meter, distribution box, data collector and domestic hot water supply pipe; The electric heater is built in the bottom of the second energy storage tank, the input end of the distribution box is connected to the line between the first electric meter and the second electric meter, and the output end of the electric distribution box is respectively connected to the air source cold and hot water unit , the controller is electrically connected, the grid-connected inverter, the first electric meter, and the second electric meter are connected in sequence, the second electric meter is connected to the mains grid, and the data collector is respectively connected to the grid-connected inverter, the second electric meter One electric meter, the second electric meter. 2. A solar combined heating, power and cooling system according to claim 1, characterized in that: a heat exchange coil is provided in the second energy storage tank, and a water temperature and water level sensor and a water level sensor are provided in the second energy storage tank. Solenoid water filling valve. 3. A solar combined heat, power and cooling system according to claim 1 or 2, characterized in that: the second circulation pump, electric heater, electromagnetic water supply valve, and water temperature and water level sensor are all electrically connected to the controller . 4. A solar combined heat, power and cooling system according to claim 1 or 2, characterized in that: the inlet end of the electric three-way valve is connected to the outlet of the air source cooling and hot water unit through a pipeline, and the outlet end is connected through a pipe The roads are respectively connected to the inlet end of the fan coil unit and the inlet end of the heat exchange coil unit. 5 . The solar combined heating, power and cooling system according to claim 1 , wherein the first electric meter is a one-way electric meter, and the second electric meter is a two-way electric meter. 6. A solar combined heating, power and cooling system according to claim 1, characterized in that: the first circulation pump is set on the pipeline between the first energy storage water tank and the air source cooling and heating unit, and the An expansion tank is arranged on the pipeline between the first circulation pump and the first energy storage water tank, and the first circulation pump is connected to the air source cold and hot water unit through a cable. 7. A solar combined heat, power and cooling system according to claim 1, characterized in that: the outlet of the second circulation pump is connected to a domestic hot water supply pipe.

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