CN111366006B

CN111366006B - Energy storage cooling system with cold and hot media cooperatively stored

Info

Publication number: CN111366006B
Application number: CN202010100726.8A
Authority: CN
Inventors: 王卫良; 吕俊复; 王倩; 刘敏; 刘吉臻; 岳光溪
Original assignee: Jinan University
Current assignee: Jinan University
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2021-03-30
Anticipated expiration: 2040-02-18
Also published as: CN112556447A; CN111366006A

Abstract

The invention provides an energy storage cooling system for cooperatively storing cold and hot media, which comprises a ventilation system, a high-temperature medium flow channel, a high-temperature medium distribution system, a heat exchange device, a low-temperature medium recovery device, a low-temperature medium flow channel, a medium power device and at least one medium storage container, wherein the ventilation system comprises a heat exchange system, a high-temperature medium flow channel, a high-temperature medium distribution system, a heat exchange device, a; the medium storage container is a variable-capacity medium storage container and is divided into two independent hot-side containers and cold-side containers by a variable-capacity adjusting device so as to meet the requirements on energy storage under different conditions; in spring, summer and autumn, which have good cooling effect, the capacity of the cold side container in the medium storage container is increased, and a large amount of cold sources are accumulated; under the conditions that the temperature is low in winter and the temperature of the low-temperature end of the heat exchange device is too low, the water outlet flow of the container at the inner hot side of the medium storage container is increased, the heat exchange device is integrally heated by using a large amount of accumulated circulating water heat sources, and the risk of local low-temperature frost cracking of the heat exchange device is reduced.

Description

Energy storage cooling system with cold and hot media cooperatively stored

Technical Field

The invention belongs to the technical field of energy storage and utilization, and particularly relates to an energy storage cooling system for cooperative storage of cold and hot media.

Background

The circulating water cooling system is used to cool the low pressure cylinder of steam turbine with cooling medium fed to the high and low pressure condenser to maintain the vacuum of the high and low pressure condenser for continuous steam-water circulation. The circulating water cooling system is a necessary condition for establishing steam turbine vacuum and taking away a cold end heat source. However, under the influence of environmental temperature and seasonal variation, most generator sets face insufficient output under the condition of high temperature in summer, and are forced to operate in a high-back-pressure and high-energy consumption state due to safety requirements such as freezing prevention in winter, so that great influence is brought to the economy, safety, stability, load response timeliness and the like of the generator sets.

In the prior art, an energy storage (cold) device is adopted, and a large amount of cold sources are stored under the better cooling condition at night in spring, summer and autumn for use in high-temperature weather in the daytime. However, since the medium storage container does not have an internal coordination variable capacity characteristic, the capacity of different container areas in the tank cannot be appropriately adjusted in time as required, and energy storage cannot be efficiently performed.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide an energy storage cooling system for cooperatively storing cold and hot media, wherein a medium storage container internally provided with two independent hot side containers and cold side containers is adopted, and the medium storage containers adjust the medium storage amounts of the hot side containers and the cold side containers as required through a variable volume adjusting device, so that the capacity of the cold side container in the medium storage container is increased and a large amount of cold sources are stored at night in spring, summer and autumn with good cooling effect; under the conditions that the temperature is low in winter and the temperature of the low-temperature end of the heat exchange device is too low, the water outlet flow of the container at the inner hot side of the medium storage container is increased, the heat exchange device is integrally heated by using a large amount of accumulated circulating water heat sources, and the risk of local low-temperature frost cracking of the heat exchange device is reduced.

The invention provides an energy storage cooling system for cooperatively storing cold and hot media, which comprises a ventilation system, a high-temperature medium flow channel, a high-temperature medium distribution system, a heat exchange device, a low-temperature medium recovery device, a low-temperature medium flow channel, a medium power device and a medium storage container, wherein the ventilation system comprises a heat exchange system, a high-temperature medium flow channel, a high-temperature medium distribution system, a heat exchange device;

the medium storage container is a variable-capacity medium storage container and comprises an upper cover, a lower cover, an outer cylinder, a variable-capacity adjusting device and at least one vent hole, wherein the vent hole is formed in the upper cover, the upper cover and the lower cover are respectively connected with the outer cylinder in a sealing mode, and the variable-capacity adjusting device is arranged in a space defined by the upper cover, the lower cover and the outer cylinder and used for dividing the medium storage container into two independent hot-side containers and two independent cold-side containers. The hot side container and the cold side container are respectively provided with at least one water inlet and at least one water outlet and are used for controlling the medium storage capacity of the hot side container and the cold side container;

the high-temperature medium runner is connected with a water inlet of a hot side container in the medium storage container, a water outlet of the hot side container is connected with a high-temperature medium distribution system, the high-temperature medium distribution system uniformly distributes the high-temperature medium to the heat exchange device and exchanges heat with the high-temperature medium in the heat exchange device through the air exchange system, the low-temperature medium recovery device collects the low-temperature medium after heat exchange and is connected with a water inlet of a cold side container in the medium storage container through the low-temperature medium runner, and a water outlet of the cold side container is connected with the medium power device through the low-temperature medium runner;

the variable volume adjusting device comprises a sliding rod, an adjusting disc and a transmission device, wherein one end of the sliding rod is connected with an upper cover, the other end of the sliding rod is connected with a lower cover, the adjusting disc axially moves up and down along the sliding rod through the transmission of the transmission device, the adjusting disc is radially and hermetically connected with the outer cylinder and divides the medium storage container into two independent hot-side containers and cold-side containers, and the edge of the adjusting disc, which is in contact with the outer cylinder, is provided with a soft adhesive layer;

the transmission device is an electric lead screw transmission device and comprises a transmission motor, the transmission motor is arranged at one end of a sliding rod and drives the sliding rod to rotate positively and negatively along the axial direction of the sliding rod, threads are arranged on the outer surface of the sliding rod, and the adjusting disc is in threaded connection with the sliding rod and moves up and down along the axial direction of the sliding rod.

The invention has the beneficial effects that:

the invention provides an energy storage cooling system for cooperatively storing cold and hot media, which comprises an air exchange system, a high-temperature medium flow channel, a high-temperature medium distribution system, a heat exchange device, a low-temperature medium recovery device, a low-temperature medium flow channel, a medium power device and a medium storage container, wherein two independent hot side containers and cold side containers are arranged in the medium storage container, and the medium storage amounts of the hot side containers and the cold side containers are adjusted as required through a variable capacity adjusting device, so that the capacity of the cold side container in the medium storage container is increased and a large amount of cold sources are accumulated at night in spring, summer and autumn with good cooling effect; under the conditions that the temperature is low in winter and the temperature of the low-temperature end of the heat exchange device is too low, the water outlet flow of the container at the inner hot side of the medium storage container is increased, the heat exchange device is integrally heated by using a large amount of accumulated circulating water heat sources, and the risk of local low-temperature frost cracking of the heat exchange device is reduced.

Drawings

The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.

FIG. 1 is a schematic diagram of an energy storage cooling system with cooperative storage of cold and hot media according to the present invention.

Fig. 2 is a schematic structural diagram of one embodiment of a medium storage container of an energy storage cooling system for the cooperative storage of cold and hot media provided by the present invention.

Fig. 3 is a schematic structural diagram of another embodiment of a medium storage container of an energy storage cooling system for the cooperative storage of cold and hot media provided by the present invention.

Fig. 4 is a schematic structural diagram of a medium storage container of an energy storage cooling system for cooperative storage of cold and hot media in accordance with yet another embodiment of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1:

referring to fig. 1, the present embodiment provides an energy storage cooling system for cooperative storage of cold and hot media, which includes a ventilation system 1, a high-temperature medium flow passage 2, a high-temperature medium distribution system 3, a heat exchange device 4, a low-temperature medium recovery device 5, a low-temperature medium flow passage 6, a medium power device 7 and a medium storage container 8;

the medium storage container 8 is a variable capacity medium storage container, and comprises an upper cover 81, a lower cover 82, an outer cylinder 83, a variable capacity adjusting device and at least one vent hole, wherein the vent hole is arranged at the upper cover 81, the upper cover 81 and the lower cover 82 are respectively connected with the outer cylinder 83 in a sealing way, and the variable capacity adjusting device is arranged in a space surrounded by the upper cover 81, the lower cover 82 and the outer cylinder 83 and is used for dividing the medium storage container 8 into two independent hot side containers and cold side containers. The hot side container and the cold side container are respectively provided with at least one water inlet and at least one water outlet and are used for controlling the medium storage amount of the hot side container and the cold side container;

the high-temperature medium runner 2 is connected with a water inlet of a hot side container in a medium storage container 8, a water outlet of the hot side container is connected with a high-temperature medium distribution system 3 through the high-temperature medium runner 2, the high-temperature medium distribution system 3 uniformly distributes the high-temperature medium to a heat exchange device 4, the ventilation system 1 exchanges heat with the high-temperature medium in the heat exchange device 4, a low-temperature medium recovery device 5 collects the low-temperature medium after heat exchange and is connected with a water inlet of a cold side container in the medium storage container 8 through a low-temperature medium runner 6, and a water outlet of a cold side container is connected with a medium power device 7 through the low-temperature medium runner 6.

Under the action of the medium power device 7, the high-temperature medium from the upstream enters the system from the high-temperature medium flow channel 2, the high-temperature medium firstly enters the medium storage container 8, then the high-temperature medium uniformly enters the heat exchange device 4 through the high-temperature medium distribution system 3, and ventilation and enhanced heat exchange are carried out through the ventilation system 1. The high-temperature medium after heat exchange becomes a low-temperature medium, and flows to a cold-side container in a medium storage container 8 through a low-temperature medium runner 6 after being collected by a low-temperature medium recovery device 5, and then flows out of a water outlet of the cold-side container and is conveyed to the downstream.

In the medium storage container 8 enclosed by the upper cover 81, the lower cover 82 and the outer cylinder 83, an internal space is divided into two independent hot side containers and cold side containers through a built-in variable volume adjusting device, the two independent hot side containers and the two independent cold side containers are used for correspondingly storing energy according to requirements under different conditions, and the capacity of the cold side container in the medium storage container 8 is increased and a large amount of cold sources are stored in the medium storage container 8 in spring, summer and autumn with good cooling effect; under the condition that the temperature is low in winter and the temperature of the low-temperature end of the heat exchange device 4 is too low, the water outlet flow of the heat side container in the medium storage container 8 is increased, the heat exchange device 4 is integrally heated by using a large amount of accumulated circulating water heat sources, and the risk of local low-temperature frost cracking of the heat exchange device 4 is reduced.

Referring to fig. 2, the variable capacity adjustment apparatus includes a sliding rod 841, an adjustment disk 842 and a transmission device, the sliding rod 841 is connected to the upper cover 81 at one end and connected to the lower cover 82 at the other end, and is fixed between the upper cover 81 and the lower cover 82, the adjustment disk 842 is driven by the transmission device to move up and down along the sliding rod 841 in the axial direction, the adjustment disk 842 is connected with the outer cylinder 83 in a sealing manner in the radial direction and divides the medium storage container 8 into two independent hot side container and cold side container, and the edge of the adjustment disk 842 contacting the outer cylinder 83 is provided with a soft rubber layer 843. The first exhaust hole 851 is provided at the upper cover 81.

The adjusting disc 842 is connected with the inner wall of the outer cylinder 83 in a sealing manner, when the adjusting disc 842 moves up and down along the sliding rod 841 in the axial direction, the relative sealing between the upper and lower two independent hot side containers and the cold side container is still realized through the soft rubber layer 843, and the exchange of media does not exist, so that the temperature of the media in the hot side container and the cold side container is more controllable.

The hot side container positioned at the upper side is provided with a first water inlet 861 and a first water outlet 862; the cold-side container on the lower side is provided with a second water inlet 863 and a second water outlet 864.

Additionally, the transmission device is an electric lead screw transmission device, and includes a transmission motor 844, the transmission motor 844 is disposed at one end of the sliding bar 841 and drives the sliding bar 841 to rotate forward and backward along the axial direction thereof, the outer surface of the sliding bar 841 is provided with threads, and the adjusting disc 842 is in threaded connection with the sliding bar 841 and moves up and down along the axial direction of the sliding bar 841.

Under the drive of the transmission motor 844, the sliding rod 841 rotates forward and backward along the axial direction thereof, and under the drive of the rotation of the sliding rod 841, the adjusting disc 842 screwed with the sliding rod 841 moves up and down along the axial direction of the sliding rod 841, thereby realizing the adjustment of the medium storage amount of the hot side container and the cold side container by manual control.

Example 2:

referring to fig. 3, the variable capacity adjustment device includes a middle fixing ring 845, upper and lower floating discs 846, and a connection layer 847, the middle fixing ring 845 is disposed in the middle of the outer cylinder 83 and is hermetically connected to the outer cylinder 83, the upper and lower floating discs 846 are flexibly connected to the middle fixing ring 845 by the connection layer 847, and the connection layer 847 is hermetically connected to the middle fixing ring 845 and the upper and lower floating discs 846, respectively, and divides the medium storage container 8 into two independent hot-side containers and cold-side containers. The second exhaust hole 852 is provided at the upper cover 81.

The upper and lower floating trays 846 are adaptively adjusted under pressure changes of the media in the hot side and cold side vessels. When there is more media in the hot side container and the force on the upper and lower floating disks 846 is greater than the force of the media in the cold side container, the upper and lower floating disks 846 move in the direction of the cold side container, thereby increasing the volume of the hot side container; when there is more media in the cold side container and the force on the upper and lower floating disks 846 is greater than the force of the media in the hot side container, the upper and lower floating disks 846 move in the direction of the hot side container, thereby increasing the volume of the cold side container.

The hot side container positioned at the upper side is provided with a third water inlet 871 and a third water outlet 872; the cold side container on the lower side is provided with a fourth water inlet 873 and a fourth water outlet 874.

Additionally, the connection layer 847 is a corrugated connection insulation layer or oilcloth to realize flexible connection between the upper and lower floating disks 846 and the intermediate fixing ring 845, so that the upper and lower floating disks 846 can move along with pressure changes and simultaneously satisfy media isolation in the hot-side container and the cold-side container.

Example 3:

referring to fig. 4, the variable capacity adjusting apparatus includes a fixing frame 848 and a movable layer 849, the fixing frame 848 is disposed on the inner wall of the medium storage container 8 and is hermetically connected to the upper cover 81, the lower cover 82 and the outer cylinder 83, respectively, the movable layer 849 is hermetically connected to the fixing frame 848 and divides the medium storage container 8 into two separate hot-side and cold-side containers, the movable layer 849 is correspondingly movable according to pressure change itself, and the movable layer 849 is tarpaulin.

A fifth water inlet 881 and a fifth water outlet 882 are arranged on the left side of the hot side container, and a third air vent 853 is arranged on the upper cover 81 corresponding to the hot side container; the cold-side container positioned at the right side is provided with a sixth water inlet 883 and a sixth water outlet 884, and a fourth exhaust hole 854 is provided at the upper cover 81 corresponding to the cold-side container.

It should be noted that the movable layer 849 is hermetically connected to the upper cover 81, the lower cover 82 and the outer cylinder 83 through a fixing frame 848, so as to achieve medium isolation between the hot side container and the cold side container, and the movable layer 849 may be a tarpaulin capable of moving itself accordingly according to pressure changes on both sides of the tarpaulin. When the medium in the hot side container is abundant and the acting force on the active layer 849 is larger than that of the medium in the cold side container, the active layer 849 moves towards the cold side container, so that the volume of the hot side container is increased; when there is more medium in the cold side reservoir and the force acting on the active layer 849 is greater than the force of the medium in the hot side reservoir, the active layer 849 moves in the direction of the hot side reservoir, thereby increasing the volume of the cold side reservoir.

Compared with the prior art, the invention provides an energy storage cooling system for cooperatively storing cold and hot media, which comprises an air exchange system 1, a high-temperature medium flow channel 2, a high-temperature medium distribution system 3, a heat exchange device 4, a low-temperature medium recovery device 5, a low-temperature medium flow channel 6, a medium power device 7 and a medium storage container 8, wherein two independent hot side containers and cold side containers are arranged in the medium storage container 8, medium storage amounts of the hot side containers and the cold side containers are adjusted according to requirements through a variable capacity adjusting device, the high-temperature medium flow channel 2 is connected with a water inlet of the hot side container in the medium storage container 8, a water outlet of the hot side container is connected with the high-temperature medium distribution system 3, the high-temperature medium is uniformly distributed to the heat exchange device 4 by the high-temperature medium distribution system 3, heat exchange is carried out on the high-temperature medium in the heat exchange device 4 by the, The water outlet of the cold side container is connected with a medium power device 7 through the low-temperature medium runner 6; the system adjusts the proportion of medium storage amount in the hot side container and the cold side container according to actual needs, so that the capacity of the cold side container in the medium storage container 8 is increased and a large amount of cold sources are accumulated at night in spring, summer and autumn with good cooling effect; under the condition that the temperature is low in winter and the temperature of the low-temperature end of the heat exchange device 4 is too low, the water outlet flow of the heat side container in the medium storage container 8 is increased, the heat exchange device 4 is integrally heated by using a large amount of accumulated circulating water heat sources, and the risk of local low-temperature frost cracking of the heat exchange device 4 is reduced.

Finally, it should be emphasized that the present invention is not limited to the above-described embodiments, but only the preferred embodiments of the invention have been described above, and the present invention is not limited to the above-described embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy storage cooling system for cooperatively storing cold and hot media is characterized by comprising a ventilation system, a high-temperature medium flow channel, a high-temperature medium distribution system, a heat exchange device, a low-temperature medium recovery device, a low-temperature medium flow channel, a medium power device and a medium storage container;

the medium storage container is a variable-volume medium storage container and comprises an upper cover, a lower cover, an outer cylinder, a variable-volume adjusting device and at least one vent hole, wherein the vent hole is formed in the upper cover, the upper cover and the lower cover are respectively connected with the outer cylinder in a sealing manner, the variable-volume adjusting device is arranged in a space surrounded by the upper cover, the lower cover and the outer cylinder and is used for dividing the medium storage container into two independent hot-side containers and cold-side containers, and the hot-side container and the cold-side container are respectively provided with at least one water inlet and at least one water outlet and are used for controlling the medium storage amount of the hot-side containers and the cold-side containers;