CN215412609U - Multi-source self-consistent system adaptive to weak network or non-network area - Google Patents

Abstract

The utility model relates to a multi-source self-consistent system adaptive to a weak network or a non-network area, which comprises an energy manufacturing unit, an energy storage unit, an energy conversion unit and an energy consumption unit, wherein the energy manufacturing unit comprises a distributed wind power station and/or a distributed photovoltaic power station; one path of electric energy output by the energy storage unit supplies power to the air source heat pump, and the other path of electric energy supplies electric energy to the energy consumption unit; the air source heat pump provides heat energy and cold energy to the energy consuming unit. According to the utility model, renewable energy resources such as wind and light are integrated on the supply side, the electric energy converted from the wind and the light is utilized to meet the power utilization requirement of users of the micro-grid, and the chemical energy storage device is used for storing wind and light output electric energy so as to meet the requirements of regional loads of various types of energy in the micro-grid.

Description

Multi-source self-consistent system adaptive to weak network or non-network area

Technical Field

The utility model relates to the technical field of building energy supply, in particular to a multisource self-consistent system adaptive to weak network or non-network areas.

Background

At present, fossil energy such as coal, petroleum and natural gas are mainly used for supplying energy to buildings, the energy resources are limited and cannot be regenerated, and in order to save energy, the renewable energy is an important measure for sustainable development to replace the traditional fossil energy. Wind and light as renewable energy can be freely obtained, converted and utilized by depending on technologies, and particularly, the difficulty in building a power distribution network and a multi-source energy supply system is great for weak-network and even non-network areas such as frontier sentry posts, independent islands, remote villages, western high-speed service areas/stations and the like. If wind and light are used as primary energy sources, a multi-source self-consistent system micro-grid system integrating power supply, heat supply and cold supply is constructed, the energy supply requirements of the regions can be met through independent operation of the micro-grid, and the micro-grid system can be incorporated into a power grid to consume renewable energy sources on the spot.

The air source heat pump has the advantages of wide application range, low operation cost, energy conservation, environmental protection and the like, is widely applied at present, has mature technology, is one of ideal technical paths for clean heating, and is a necessary product based on energy conservation, emission reduction, safety and environmental protection development. The heat pump technology transfers heat in the ambient air environment to heating water, has the advantages of convenience in heat taking, safety, high efficiency and convenience in installation in actual operation, and is widely applied as a preferred form of clean heat supply/cold supply at present. The inventor takes renewable energy as primary energy of a supply side, and carries out conversion of heat energy and cold energy based on an air source heat pump to construct a multi-source self-consistent system suitable for multiple regions.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a multisource self-consistent system adaptive to a weak network or a non-network area, which takes wind and light renewable resources as supply side energy sources and is matched with an air source heat pump to realize cold/heat conversion, thereby meeting different requirements of power supply, heat supply and cold supply of users.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a multi-source self-consistent system adaptive to weak network or non-network areas comprises an energy manufacturing unit, an energy storage unit, an energy conversion unit and an energy consumption unit, wherein the energy manufacturing unit comprises a distributed wind power station and/or a distributed photovoltaic power station; one path of electric energy output by the energy storage unit supplies power to the air source heat pump, and the other path of electric energy supplies electric energy to the energy consumption unit; the air source heat pump provides heat energy and cold energy to the energy consuming unit.

Further, the energy storage unit adopts a battery energy storage device.

Furthermore, the air source heat pump comprises an evaporator, a compressor, a heat exchanger and a throttling device which are connected in sequence, wherein a refrigerant in the evaporator absorbs heat in ambient air and then is vaporized, the refrigerant is compressed and heated by the compressor to become high-temperature high-pressure gas, and the high-temperature high-pressure gas and normal-temperature water in the heat exchanger exchange heat to generate high-temperature water which provides heat energy for the energy consumption unit.

And further, the normal-temperature water after heat exchange flows back to the water storage tank to enter the next circulation for use.

Furthermore, the refrigerant in the heat exchanger is vaporized after absorbing heat in the environment, the water temperature is reduced, the low-temperature low-pressure gaseous refrigerant is compressed by the compressor to be changed into high-temperature high-pressure gas, the high-temperature high-pressure gas enters the evaporator, the temperature of the refrigerant is higher than that of air, the refrigerant conducts heat to the air and is condensed into high-pressure liquid, the high-pressure liquid flows into the heat exchanger through the throttling device, a refrigeration cycle is completed, and cold water generated in the cycle process provides cold energy for the energy consumption unit.

Based on the advantages and characteristics of the electrochemical energy storage technology and the air source heat pump technology, the multi-source self-consistent system is constructed to meet the energy utilization requirement of the user side of the complicated geographic environment region based on the energy utilization requirement and the energy supply current situation of the weak network or non-network region. Renewable energy resources such as wind and light are integrated on the supply side of the system, the electric energy converted from the wind and the light is utilized to meet the power utilization requirements of users of the micro-grid, on the basis, the wind and light output electric energy is stored through a chemical energy storage device, and under the on-grid/off-grid state, the energy storage device can release the electric energy to reduce the dependence on the power grid, and can also realize the conversion of heat/cold of the stored electric energy through an air source heat pump so as to meet the requirements of regional loads of various types of energy in the micro-grid.

Drawings

Fig. 1 is a schematic structural diagram of a multi-source consistency system in an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The embodiment discloses a multi-source self-consistent system adapting to weak network or non-network areas, as shown in fig. 1, the system can be divided into four units according to energy source, flow, conversion and consumption processes, namely: the device comprises an energy manufacturing unit, an energy storage unit, an energy conversion unit and an energy consumption unit. The energy manufacturing unit mainly refers to a distributed wind power station and a distributed photovoltaic power station which are configured by the microgrid, green high-quality electric energy is provided for the microgrid system by means of efficient and clean renewable energy, and whether the energy manufacturing unit is connected with a power grid or not can be considered as a backup power supply guarantee of the microgrid by combining the actual situation of the microgrid on site. The energy storage unit mainly refers to energy storage equipment, the energy storage equipment in the embodiment adopts chemical energy storage equipment, namely a battery energy storage device, and the electric energy required by the device mainly depends on the electric energy generated by a distributed wind power station and a distributed photovoltaic power station. The "energy conversion unit" here mainly includes an air source heat pump, a circulation pump, and the like. The air source heat pump is composed of an evaporator, a compressor, a heat exchanger, a throttling device and the like. The energy consumption unit is an energy consumption end or a user end, the assumed main application scenes comprise a frontier sentry, a remote village, an independent island, a western station, a western high-speed service area and the like, and the energy requirements of the application scenes provided in the embodiment mainly comprise electric energy, heat energy and cold energy.

One path of the electric energy output by the energy manufacturing unit is stored in the energy storage unit, the other path of the electric energy supplies power to the air source heat pump in the energy conversion unit, and the other path of the electric energy supplies electric energy to the energy consumption unit. One path of the electric energy output by the energy storage unit supplies power to the air source heat pump, and the other path of the electric energy outputs electric energy to the energy consumption unit. Under the cooperative cooperation of the evaporator, the compressor, the heat exchanger and the throttling device, the refrigerant is vaporized in the evaporator or the heat exchanger after absorbing the environmental heat, the liquefaction process is carried out in the heat exchanger or the evaporator, and the heat transfer can be realized in the process of forward circulation or reverse circulation of the refrigerant in the device, so that the heat energy or cold energy requirements of load users are met.

When the air source heat pump is used for heating, refrigerant in the evaporator absorbs heat in ambient air and then is vaporized, the heat is compressed and heated through the compressor to be changed into high-temperature high-pressure gas, the high-temperature high-pressure gas after heat exchange with normal-temperature water in the heat exchanger releases pressure through the expansion valve, the high-temperature high-pressure gas returns to a low-temperature low-pressure liquefied state, low-grade heat in the air is continuously absorbed through continuous circulation of refrigerant, and the part of heat is transferred to prepare hot water. The generated hot water is directly used by users, and the normal temperature water after heat transfer replacement flows back into the water storage tank to enter the next reciprocating circulation. When the air source heat pump is used for refrigeration, a refrigerant in the heat exchanger absorbs heat in the environment and then is vaporized, the water temperature is reduced, a low-temperature low-pressure gaseous refrigerant is compressed by the compressor to be changed into high-temperature high-pressure gas, the high-temperature high-pressure gas enters the air evaporator, the temperature of the refrigerant is higher than that of air, the refrigerant conducts heat to the air and is condensed into high-pressure liquid, the high-pressure liquid flows into the heat exchanger through the throttling device, primary circulation is completed, and cold water generated in the circulation process is directly used by a user.

The whole self-consistent system also comprises an intelligent control system, and under the regulation and control of the intelligent control system, the self-consistent system can independently operate in an off-grid state, so that the energy requirement of a user side can be effectively guaranteed; the wind and light renewable energy can be also incorporated into a power grid to locally consume wind and light renewable resources, and a feasible technical path is searched for the energy consumption of vast scattered users in remote areas in the western part of China.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A multisource self-consistent system adapting to weak network or non-network areas is characterized in that: the energy generation system comprises an energy manufacturing unit, an energy storage unit, an energy conversion unit and an energy consumption unit, wherein the energy manufacturing unit comprises a distributed wind power station and/or a distributed photovoltaic power station, one path of electric energy output by the energy manufacturing unit is stored in the energy storage unit, the other path of electric energy supplies power to an air source heat pump in the energy conversion unit, and the other path of electric energy supplies electric energy to the energy consumption unit; one path of electric energy output by the energy storage unit supplies power to the air source heat pump, and the other path of electric energy supplies electric energy to the energy consumption unit; the air source heat pump provides heat energy and cold energy to the energy consuming unit.

2. A multi-source self-consistent system adapted to weak or non-network areas according to claim 1, characterized by: the energy storage unit adopts a battery energy storage device.

3. A multi-source self-consistent system adapted to weak or non-network areas according to claim 1, characterized by: the air source heat pump comprises an evaporator, a compressor, a heat exchanger and a throttling device which are sequentially connected, wherein a refrigerant in the evaporator absorbs heat in ambient air and then is vaporized, the refrigerant is compressed and heated by the compressor to become high-temperature high-pressure gas, and the high-temperature high-pressure gas and normal-temperature water in the heat exchanger exchange heat to generate high-temperature water which provides heat energy for the energy consumption unit.

4. A multi-source self-consistent system adapted to weak or non-network areas according to claim 3, characterized by: and the normal temperature water after heat exchange flows back to the water storage tank to enter the next cycle for use.

5. A multi-source self-consistent system adapting to weak or no net areas according to claim 3 or 4, characterized by: the refrigerant in the heat exchanger is vaporized after absorbing heat in the environment, the water temperature is reduced, the low-temperature low-pressure gaseous refrigerant is compressed by the compressor to be changed into high-temperature high-pressure gas, the high-temperature high-pressure gas enters the evaporator, the temperature of the refrigerant is higher than that of air, the refrigerant conducts heat to the air and is condensed into high-pressure liquid, the high-pressure liquid flows into the heat exchanger through the throttling device, a refrigeration cycle is completed, and cold water generated in the cycle process provides cold energy for the energy consumption unit.

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