阅读说明：本技术 一种先进多能互补的冷热电联供压缩空气储能系统及应用方法 (Advanced multi-energy complementary combined cooling heating and power compressed air energy storage system and application method ) 是由 蒋润花 杨小平 蔡卓第 于 2019-07-19 设计创作，主要内容包括：本发明属于储能系统技术领域,特别涉及一种先进多能互补的冷热电联供压缩空气储能系统及应用方法,所述冷热电联供压缩空气储能系统设有压缩空气储能装置、储热装置和太阳能集热装置,所述压缩空气储能装置、储热装置和太阳能集热装置集成于冷热电联供压缩空气储能系统内；所述冷热电联供压缩空气储能系统将回收压缩空气的热量和太阳能集热装置提供的热量储存在储热系统中,并在透平前端设置了燃烧器,通过调节储热系统中的加热量和进入燃烧器的化石燃料量来调节透平入口高压空气的温度,提供给用户所需的不同季节的冷、热和电负荷需求。本发明提出多能互补的冷热电联供空气储能系统及应用方法,回收利用压缩空气的热量,实现太阳能与化石燃料互补,将太阳能直接转换成用户所需的冷、热和电负荷,从而有效利用了太阳能,提高了系统的发电效率和总能利用率。(the invention belongs to the technical field of energy storage systems, and particularly relates to an advanced multi-energy complementary combined cooling heating and power compressed air energy storage system and an application method thereof, wherein the combined cooling heating and power compressed air energy storage system is provided with a compressed air energy storage device, a heat storage device and a solar heat collection device, and the compressed air energy storage device, the heat storage device and the solar heat collection device are integrated in the combined cooling heating and power compressed air energy storage system; the combined cooling heating and power compressed air energy storage system stores the heat of the recovered compressed air and the heat provided by the solar heat collection device in the heat storage system, the combustor is arranged at the front end of the turbine, the temperature of high-pressure air at the inlet of the turbine is adjusted by adjusting the heating capacity in the heat storage system and the fossil fuel amount entering the combustor, and the requirements of cold, heat and power loads in different seasons required by users are met. The invention provides a multi-energy complementary combined cooling heating and power air energy storage system and an application method thereof, which can recycle the heat of compressed air, realize the complementation of solar energy and fossil fuel and directly convert the solar energy into cold, heat and electric loads required by users, thereby effectively utilizing the solar energy and improving the power generation efficiency and the total energy utilization rate of the system.)

1. an advanced multi-energy complementary combined cooling heating and power compressed air energy storage system is characterized in that the compressed air energy storage system is provided with a compressed air energy storage device, a heat storage device and a solar heat collection device, wherein the compressed air energy storage device, the heat storage device and the solar heat collection device are connected and integrated in the multi-energy complementary combined cooling heating and power compressed air energy storage system; the combined cooling heating and power compressed air energy storage system stores the heat of the recovered compressed air and the heat provided by the solar heat collecting device in the heat storage device, the combustor (10) is arranged at the front end of the turbine (11), the temperature of high-pressure air at the inlet of the turbine (11) is adjusted by adjusting the heating quantity of the heat storage device and the fossil fuel quantity entering the combustor (10), and the cold, heat and power load requirements of users in different seasons are provided.

2. The advanced multi-energy complementary combined cooling, heating and power compressed air energy storage system according to claim 1, wherein the compressed air energy storage device comprises a plurality of switches (1, 7, 15, 19, 21), a low-pressure compressor (2), a plurality of heat exchangers (3, 5, 9, 17), a high-pressure compressor (4), an air storage tank (6), regulating valves (8, 16, 20, 22), a combustor (10), a turbine (11), a generator (12), a voltage compression type refrigerator (13) and a boiler (24); the heat storage device consists of a hot tank (14) and a cold tank (18); the solar heat collection device is provided with a solar heat collector (23).

3. The advanced multi-energy complementary combined cooling, heating and power compressed air energy storage system as claimed in claim 2, wherein the plurality of heat exchangers (3, 5, 9, 17) comprise a first heat exchanger (3), a second heat exchanger (5), a third heat exchanger (9) and a fourth heat exchanger (17), and the low-pressure compressor (2), the first heat exchanger (3), the high-pressure compressor (4), the second heat exchanger (5) and the air storage tank (6) are sequentially connected to form an energy storage loop.

4. the advanced multi-energy complementary combined cooling, heating and power compressed air energy storage system as claimed in claim 1, wherein the hot tank (14) is connected with the first heat exchanger (3) and the second heat exchanger (5), and the cold tank (18) is connected with the first heat exchanger (3) and the second heat exchanger (5); the cold tank (18), the regulating valve (22), the solar heat collector (23) and the hot tank (14) are sequentially connected to form a solar heat storage loop.

5. the advanced multi-energy complementary combined cooling, heating and power compressed air energy storage system according to claim 4, wherein the air storage tank (6), the regulating valve (8), the third heat exchanger (9), the combustor (10), the turbine (11) and the generator (12) are sequentially connected to form a power generation module, and the hot tank (14) is also connected with the third heat exchanger (9) through the regulating valve (16).

6. The advanced multi-energy complementary combined cooling, heating and power compressed air energy storage system according to claim 5, wherein the third heat exchanger (9) is connected with a fourth heat exchanger (17), and the fourth heat exchanger (17) is connected with a cold tank (18).

7. The advanced multi-energy complementary combined cooling, heating and power compressed air energy storage system as claimed in claim 6, wherein the combustor (10) and the turbine (11) are connected in sequence to form a power supply module, a cooling module or a heating module, and the combustor (10) is a fuel quantity variable structure.

8. The advanced multi-energy complementary combined cooling, heating and power compressed air energy storage system according to any one of claims 1 to 7, wherein the electric compression refrigeration machine (13) is connected with an electric generator (12).

9. The application method of the advanced multi-energy complementary combined cooling heating and power compressed air energy storage system as claimed in any one of claims 1 to 8, characterized by comprising the following steps: comprises a power consumption peak period, a power consumption valley period, a cooling period and a heating period;

(1) When electricity is used in a low valley, the switch (1) and the switch (19) are closed, the switch (7) and the switch (15) are opened, and the compressed air energy storage system with combined cooling, heating and power is in an energy storage stage; air enters a low-pressure compressor (2) to be subjected to adiabatic compression, compressed air from the low-pressure compressor (2) enters a first heat exchanger (3) to be subjected to constant-pressure cooling to ambient temperature, then enters a high-pressure compressor (4) to be subjected to adiabatic compression, high-pressure air from the high-pressure compressor (4) is subjected to constant-pressure cooling to ambient temperature in a second heat exchanger (5), and low-temperature high-pressure air from the second heat exchanger (5) enters an air storage tank (6) to be stored;

(2) During the peak of electricity consumption, the switch (1) and the switch (19) are closed, the switch (7) and the switch (15) are opened, and the compressed air energy storage system for combined cooling, heating and power is in an energy release stage; high-pressure air from an air storage tank (6) is adjusted in air flow through an adjusting valve (8), then enters a third heat exchanger (9) and is heated by hot fluid of a hot tank (14), the heated high-pressure air enters a combustor (10) to be further heated and then enters a turbine (11) to do work through expansion, work output by the turbine (11) drives a generator (12) to generate electricity, the electricity load required by a user is provided, and exhaust gas from the turbine (11) is used for heat supply or cold supply;

(3) In the cold supply period, the required load is mainly electricity and cold, the fuel quantity entering the combustor (10) is reduced, the compressed air entering the turbine (11) is heated to a lower temperature, the high-pressure air does work in the turbine (11) to drive the generator to generate electricity to provide electric energy required by a user, and the temperature of exhaust gas from the turbine (11) is lower than the ambient temperature, so that the cold supply can be performed for the user;

(4) In the heating period, the required load is mainly electricity and heat, the fuel quantity entering the combustor (10) is increased, the compressed air entering the turbine (11) is heated to a higher temperature, the high-pressure air does work in the turbine (11) to drive the generator to generate electricity to provide the electric energy required by a user, and the temperature of the exhaust gas from the turbine (11) is higher than the ambient temperature and is used for providing the heat load required by the user.

10. The application method of the advanced multi-energy complementary combined cooling heating and power compressed air energy storage system as claimed in claim 9, wherein in the valley of the electricity consumption in the step (1), the cold fluid in the cold tank (18) is heated into hot fluid in the first heat exchanger (3) and the second heat exchanger (5), and the heat of compression of the compressed air from the low-pressure compressor (2) and the high-pressure compressor (4) is recovered and enters the hot tank (14) to be stored.

Technical Field

The invention belongs to the technical field of energy-saving systems, and particularly relates to an advanced multi-energy complementary combined cooling heating and power compressed air energy storage system and an application method thereof.

Background

With the rapid development of economy and society, the energy produced cannot meet the energy demand of increasing consumption, so that the development of renewable energy and the improvement of the energy utilization rate are the main measures adopted at present, but the energy utilization rate is low due to the energy application problems of the intermittency of the renewable energy, the power grid power peak valley difference and the like, and therefore, the energy storage technology provides a very effective way for solving the problems. At present, energy storage technologies mainly include pumped water energy storage, battery energy storage, flywheel energy storage, superconducting energy storage, compressed air energy storage and the like, wherein the compressed air energy storage technology draws wide attention due to the advantages of good economy, high efficiency, long service life and the like.

according to the heat utilization condition of the compression process, the compressed air energy storage system is divided into a diathermy compressed air energy storage system and an adiabatic compressed air energy storage system, wherein the adiabatic compressed air energy storage system is used for heating air at the inlet of the turbine through the heat of the recovered compressed air, the energy utilization rate is improved, and a large amount of research is obtained. However, the temperature of the heat of the recovered compressed air is not high, so that the power generation efficiency of the compressed air energy storage system is low, and the energy utilization of the system is mainly in the forms of electricity and heat. In fact, the load types of users vary with seasonal changes, the loads needed in summer are mainly electricity and cold, the loads needed in winter are mainly electricity and heat, and the energy in the compressed air energy storage system cannot be fully applied, so that the annual energy utilization rate of the system is low.

Solar energy is the most potential renewable energy source in the 21 st century, and the development and utilization of the solar energy are hot spots concerned by countries all over the world, wherein the most common utilization mode is solar heat utilization, and the radiant energy of the sun is converted into usable heat energy through a solar heat collecting device. However, how to convert heat energy into electricity well needs a power generation device to complete the heat energy conversion under normal conditions, but such an arrangement would greatly increase the investment cost, is not favorable for the universality of use,

Disclosure of Invention

the invention aims to overcome the defects and shortcomings of the existing compressed air energy storage system and provide an advanced multi-energy complementary combined cooling heating and power compressed air energy storage system and an application method thereof. The heat of the compressed air is recycled, the complementation of solar energy and fossil fuel is realized, and the solar energy is directly converted into cold, heat and electric loads required by users, so that the solar energy is effectively utilized, and the power generation efficiency and the total energy utilization rate of the system are improved.

The purpose of the invention is realized by the following technical scheme:

The compressed air energy storage system is provided with a compressed air energy storage device, a heat storage device and a solar heat collection device, wherein the compressed air energy storage device, the heat storage device and the solar heat collection device are connected and integrated in the combined cooling heating and power compressed air energy storage system; the combined cooling heating and power compressed air energy storage system stores the heat of the recovered compressed air and the heat provided by the solar heat collection device in the heat storage device, the combustor is arranged in front of the turbine, the temperature of high-pressure air at the inlet of the turbine is adjusted by adjusting the heating quantity of the heat storage device and the fossil fuel quantity entering the combustor, and the requirements of cold, heat and power loads in different seasons required by a user are met.

According to the characteristics of the compressed air energy storage system, the compressed air energy storage system is not only an energy storage device but also a power generation device, so that the invention provides an advanced multi-energy complementary combined cooling, heating and power compressed air energy storage system by integrating a heat storage device, a solar heat collection device and the compressed air energy storage device. The heat energy collected by the solar heat collector is stored in the heat storage device, when the energy is released, the temperature of the air at the inlet of the turbine is heated by the hot working medium in the heat storage system, and the temperature of the air at the inlet of the turbine in the compressed air energy storage system is adjusted according to the load requirements of users in different seasons to provide cold, heat and electric loads for the users.

therefore, the heat storage device, the solar heat collection device and the compressed air energy storage device are integrated to be particularly important for the efficient utilization of renewable energy, the low-grade solar heat energy is converted into high-grade electric energy, the cold, heat and electricity triple supply of the compressed air energy storage device is realized, the energy in the compressed air energy storage system is efficiently and fully utilized, the environmental pollution is reduced, the cost is reduced, and the comprehensive energy utilization rate of the system is improved.

Preferably, the compressed air energy storage device comprises a plurality of switches, a low-pressure compressor, a plurality of heat exchangers, a high-pressure compressor, an air storage tank, a regulating valve, a combustor, a turbine, a generator, a voltage-compression refrigerator and a boiler; the heat storage system device consists of a hot tank and a cold tank; the solar heat collection device is provided with a solar heat collector.

Preferably, the plurality of heat exchangers include a first heat exchanger, a second heat exchanger, a third heat exchanger and a fourth heat exchanger, and the low-pressure compressor, the first heat exchanger, the high-pressure compressor, the second heat exchanger and the gas storage tank are sequentially connected to form an energy storage loop.

Preferably, the hot tanks are connected with the first heat exchanger and the second heat exchanger, and the cold tanks are connected with the first heat exchanger and the second heat exchanger; the cold tank, the regulating valve, the solar thermal collector and the hot tank are sequentially connected to form a solar thermal storage loop.

Preferably, the air storage tank, the regulating valve, the third heat exchanger, the combustor, the turbine and the generator are sequentially connected to form a power generation module, and the hot tank in the heat storage system is also connected with the third heat exchanger through the regulating valve.

Preferably, the third heat exchanger is connected with a fourth heat exchanger, and the fourth heat exchanger is connected with a cold tank.

preferably, the combustor and the turbine are connected in sequence to form a power supply module, a cooling module or a heating module, and the combustor is variable in fuel quantity.

Preferably, the voltage-reduction refrigerator is connected to a generator.

the invention also provides an application method of the advanced multi-energy complementary combined cooling heating and power compressed air energy storage system, which comprises the following specific steps: comprises a power consumption peak period, a power consumption valley period, a cooling period and a heating period;

(1) When the electricity is used in the valley, two switches are closed, the other two switches are opened, and the compressed air energy storage system is in an energy storage stage; air enters a low-pressure air compressor to be subjected to adiabatic compression, compressed air from the low-pressure air compressor enters a first heat exchanger to be subjected to constant-pressure cooling to reach the ambient temperature, then enters a high-pressure air compressor to be subjected to adiabatic compression, high-pressure air from the high-pressure air compressor is subjected to constant-pressure cooling to reach the ambient temperature in a second heat exchanger, and low-temperature high-pressure air from the second heat exchanger enters an air storage tank to be stored;

(2) during the peak of electricity utilization, the two switches are closed, the two switches are opened, and the compressed air energy storage system is in an energy release stage; the high-pressure air from the air storage tank passes through a regulating valve to regulate the air flow, then enters a third heat exchanger to be heated by the hot fluid in the hot tank, the heated high-pressure air enters a combustor to be further heated, then enters a turbine to perform expansion work, the work output by the turbine drives a generator to generate power to provide the power load required by a user, and the exhaust gas from the turbine is used for heat supply or cold supply;

(3) In the cold supply period, the required load is mainly electricity and cold, the fuel quantity entering the combustor is reduced, the compressed air entering the turbine is heated to a lower temperature, the high-pressure air does work in the turbine to drive the generator to generate electricity to provide electric energy required by a user, and the exhaust temperature from the turbine is lower than the ambient temperature, so that the cold can be supplied to the user;

(4) In the heat supply period, the required load is mainly electricity and heat, the fuel quantity entering the combustor is increased, the compressed air entering the turbine is heated to a higher temperature, the high-pressure air does work in the turbine to drive the generator to generate electricity to provide the electric energy required by a user, and the temperature of the exhaust gas from the turbine is higher than the ambient temperature and is used for providing the heat load required by the user.

Preferably, in the electricity valley of step (1), the cold fluid of the cold tank is heated to be hot fluid in the first heat exchanger and the second heat exchanger, and the heat of compression of the compressed air from the low-pressure compressor and the high-pressure compressor is recovered and enters the hot tank to be stored.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the integration of a heat storage device, a solar heat collection device and a compressed air energy storage device is particularly important for the efficient utilization of renewable energy sources, so that the solar low-grade heat energy is converted into high-grade electric energy, the cold, heat and electricity combined supply of the compressed air energy storage device is realized, the energy in the compressed air energy storage device is efficiently and fully utilized, the environmental pollution is reduced, the cost is reduced, and the comprehensive energy utilization rate of the system is improved.

drawings

Fig. 1 is a schematic diagram of an advanced multi-energy complementary combined cooling, heating and power compressed air energy storage system according to this embodiment.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

the same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for convenience of description and simplicity of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings: