阅读说明：本技术 一种用于海水工厂化养殖的太阳能梯度相变蓄放热系统 (Solar gradient phase change heat storage and release system for seawater industrial culture ) 是由 李真一 刘鹰 孙建明 仲冬 周昊 张海清 郭海滨 赵永录 于 2019-08-23 设计创作，主要内容包括：本发明属于海水养殖技术领域,特别涉及一种用于海水工厂化养殖的太阳能梯度相变蓄放热系统。包括热海水箱、太阳能集热器及蓄热系统,其中热海水箱通过供水管路与养殖池连通,蓄热系统通过供热循环管路与热海水箱内设有的换热器连接,供热循环管路上设有循环泵Ⅰ,形成第一供热模式；太阳能集热器连接在供热循环管路上、且与蓄热系统并联,形成第一蓄热模式,太阳能集热器通过供热循环管路可直接为热海水箱提供热能,形成第二供热模式。本发明设计了多单元、多储罐的梯度相变蓄放热系统,系统设计兼顾保温和防腐蚀功能,并以PLC控制实现热源的精准采集和释放。(The invention belongs to the technical field of mariculture, and particularly relates to a solar gradient phase change heat storage and release system for seawater industrial culture. The system comprises a hot sea water tank, a solar heat collector and a heat storage system, wherein the hot sea water tank is communicated with a culture pond through a water supply pipeline, the heat storage system is connected with a heat exchanger arranged in the hot sea water tank through a heat supply circulating pipeline, and a circulating pump I is arranged on the heat supply circulating pipeline to form a first heat supply mode; the solar thermal collector is connected on the heat supply circulating pipeline and is connected in parallel with the heat storage system to form a first heat storage mode, and the solar thermal collector can directly provide heat energy for the hot seawater tank through the heat supply circulating pipeline to form a second heat supply mode. The invention designs a gradient phase change heat storage and release system with multiple units and multiple storage tanks, the system design has heat preservation and corrosion prevention functions, and the precise collection and release of a heat source are realized by PLC control.)

1. A solar gradient phase change heat storage and release system for seawater industrial culture is characterized by comprising a hot seawater tank (4), a solar heat collector (19) and a heat storage system (26), wherein the hot seawater tank (4) is communicated with a culture pond (16) through a water supply pipeline, the heat storage system (26) is connected with a heat exchanger arranged in the hot seawater tank (4) through a heat supply circulating pipeline, and a circulating pump I (27) is arranged on the heat supply circulating pipeline to form a first heat supply mode; the solar thermal collector (19) is connected on the heat supply circulating pipeline and is connected with the heat storage system (26) in parallel to form a first heat storage mode, and the solar thermal collector (19) can directly provide heat energy for the hot seawater tank (4) through the heat supply circulating pipeline to form a second heat supply mode.

2. The solar gradient phase-change heat storage and release system for seawater industrial aquaculture according to claim 1, wherein the two ends of the heat storage system (26) are respectively connected with the heat supply circulation pipeline through an electromagnetic three-way valve, the heat storage system (26) comprises a plurality of groups of heat storage and release units which are connected in parallel and have different heat storage temperatures, and each group of heat storage and release units comprises a plurality of jacketed heat storage tanks (33) which are connected in series.

3. The solar gradient phase change heat storage and release system for seawater industrial aquaculture according to claim 2, wherein the jacketed heat storage tank (33) comprises a tank body (331) filled with a phase change material and a shell (332) arranged outside the tank body (331), an annular space for medium oil to pass through is arranged between the shell (332) and the tank body (331), and a heater (333) for heating the medium oil is arranged at the bottom of the shell (332).

4. The solar gradient phase-change heat accumulation and release system for seawater industrial aquaculture as claimed in claim 2, wherein the heat accumulation system (26) further comprises a coil heat accumulation container (34) connected in parallel with the heat accumulation and release units, two ends of the heat accumulation system (26) are respectively provided with an electromagnetic valve for controlling the inlet and outlet of a heat supply medium, and one end of each group of the heat accumulation and release units is provided with an electromagnetic valve.

5. The solar gradient phase-change heat storage and release system for seawater industrial aquaculture according to claim 4, wherein the coil heat storage container (34) comprises an inner coil heat storage container shell (342) with a copper coil arranged inside and an outer coil heat storage container shell (341) arranged outside the inner coil heat storage container shell (342), an annular cavity for filling a heat insulation layer is arranged between the outer coil heat storage container shell (341) and the inner coil heat storage container shell (342), and the outer surface of the copper coil is coated with an anti-corrosion and heat conduction material.

6. The solar gradient phase-change heat storage and release system for seawater industrial aquaculture as claimed in claim 1, wherein a temperature sensor I (6), a temperature sensor II (7) and a water level sensor I (8) are arranged in the hot seawater tank (4), wherein the temperature sensor I (6) and the temperature sensor II (7) are respectively used for detecting the temperature of seawater at a high position and a low position in the hot seawater tank (4).

7. The solar gradient phase-change heat storage and release system for seawater industrial culture according to claim 1, wherein the material of the hot seawater tank (4) is polypropylene.

8. The solar gradient phase change heat storage and release system for seawater industrial culture according to claim 1, wherein a circulating pump II (28) and a heat conduction oil heater (29) are connected to the heat supply circulating pipeline, the circulating pump II (28) and the heat conduction oil heater (29) are connected in series and are connected in parallel with the heat storage system (26), the heat conduction oil heater (29) stores heat through the heat storage system (26) to form a second heat storage mode, and the heat conduction oil heater (29) can directly provide heat energy for the hot seawater tank (9) to form a third heat supply mode.

9. The solar gradient phase-change heat storage and release system for seawater industrial aquaculture of claim 8, wherein the switching among the first heat supply mode, the second heat supply mode, the third heat supply mode, the first heat storage mode and the second heat storage mode is controlled by matching a plurality of electromagnetic three-way valves on a heat supply circulation pipeline.

10. The solar gradient phase change heat storage and release system for seawater industrial aquaculture according to any one of claims 1 to 9, further comprising a cold seawater tank (5) connected in parallel with the hot seawater tank (4), wherein the hot seawater tank (4) is connected with the water outlet of the cold seawater tank (5) through a water mixing device, the water mixing device is connected with a water supply pipeline, a temperature sensor III (9) and a water level sensor II (10) are arranged in the cold seawater tank (5), and a temperature sensor IV (4) and a flow meter (15) are arranged on the water supply pipeline.

Technical Field

The invention belongs to the technical field of mariculture, and particularly relates to a solar gradient phase change heat storage and release system for supplying industrial seawater culture temperature-regulating water.

Background

The high cost of seawater industrial aquaculture is an important reason for restricting the competitiveness of the industry, the statistical energy cost accounts for about 30% of the total cost of aquaculture enterprises, and on the other hand, the policy of coal heating is ended, so that a sustainable utilization and low-cost clean energy implementation scheme is urgently needed to realize economic and environment win-win sustainable development of the seawater aquaculture industry.

Disclosure of Invention

In view of the above problems, the present invention provides a solar gradient phase change heat storage and release system for seawater industrial aquaculture temperature-regulated water, so as to realize the supply of seawater aquaculture temperature-regulated water using solar energy as a main heat source.

In order to achieve the purpose, the invention adopts the following technical scheme:

a solar gradient phase change heat storage and release system for seawater industrial culture comprises a hot seawater tank, a solar heat collector and a heat storage system, wherein the hot seawater tank is communicated with a culture pond through a water supply pipeline, the heat storage system is connected with a heat exchanger arranged in the hot seawater tank through a heat supply circulating pipeline, and a circulating pump I is arranged on the heat supply circulating pipeline to form a first heat supply mode; the solar thermal collector is connected on the heat supply circulating pipeline and connected with the heat storage system in parallel to form a first heat storage mode, and the solar thermal collector can directly provide heat energy for the hot sea water tank through the heat supply circulating pipeline to form a second heat supply mode.

The both ends of heat storage system are connected with heat supply circulation pipeline through an electromagnetism three-way valve respectively, the heat storage system includes multiunit parallel connection and the different heat accumulation and release unit of heat accumulation temperature, and every group holds the jacket formula heat storage tank that heat release unit all includes a plurality of series connection.

The jacketed heat storage tank comprises a tank body filled with a phase-change material and a shell arranged on the outer side of the tank body, an annular space for medium oil to pass through is formed between the shell and the tank body, and a heater for heating the medium oil is arranged at the bottom of the shell.

The heat storage system also comprises a coil heat storage container connected with the heat storage and release units in parallel, two ends of the heat storage system are respectively provided with an electromagnetic valve used for controlling the inlet and outlet of a heat supply medium, and one end of each heat storage and release unit is provided with an electromagnetic valve.

The coil pipe heat storage container comprises a coil pipe heat storage container inner shell and a coil pipe heat storage container outer shell, wherein a copper coil pipe is arranged in the coil pipe heat storage container inner shell, the coil pipe heat storage container outer shell is arranged on the outer side of the coil pipe heat storage container inner shell, an annular cavity used for filling a heat insulation layer is arranged between the coil pipe heat storage container outer shell and the coil pipe heat storage container inner shell, and the outer surface of the copper coil pipe is.

A temperature sensor I, a temperature sensor II and a water level sensor I are arranged in the hot sea water tank, wherein the temperature sensor I and the temperature sensor II are respectively used for detecting the temperature of high-level sea water and low-level sea water in the hot sea water tank.

The hot seawater tank is made of polypropylene materials.

The heat supply circulating pipeline is connected with a circulating pump II and a heat conduction oil heater, the circulating pump II is connected with the heat conduction oil heater in series and is connected with the heat storage system in parallel, the heat conduction oil heater stores heat through the heat storage system to form a second heat storage mode, and the heat conduction oil heater can directly provide heat energy for the hot sea water tank to form a third heat supply mode.

And the switching among the first heat supply mode, the second heat supply mode, the third heat supply mode, the first heat storage mode and the second heat storage mode is controlled by matching a plurality of electromagnetic three-way valves on a heat supply circulating pipeline.

The solar gradient phase change heat storage and release system for seawater industrial aquaculture further comprises a cold seawater tank connected with the hot seawater tank in parallel, water outlets of the hot seawater tank and the cold seawater tank are connected through water mixing equipment, the water mixing equipment is connected with a water supply pipeline, a temperature sensor III and a water level sensor II are arranged in the cold seawater tank, and a temperature sensor IV and a flowmeter are arranged on the water supply pipeline.

The invention has the advantages and beneficial effects that: the invention aims to design and realize a mariculture temperature-regulating water supply scheme taking solar energy as a main heat source, creatively designs a gradient phase change heat storage and release system with multiple units and multiple storage tanks, gives consideration to the heat preservation and corrosion prevention functions in the system design, and realizes the accurate collection and release of the heat source by PLC control.

The heat source of the invention is not limited to solar energy, and the application of the phase-change materials with various phase-change temperatures enables the heat source to be expanded to industrial waste heat, valley electricity and the like.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view showing the construction of a heat storage system according to the present invention;

fig. 3 is a schematic structural diagram of a jacketed heat storage tank according to the present invention;

FIG. 4 is a bottom view of FIG. 3;

FIG. 5 is a schematic view of a coiled heat storage container according to the present invention.

In the figure: 1 is a water inlet valve, 2 is an electromagnetic valve I, 3 is an electromagnetic valve II, 4 is a hot sea water tank, 5 is a cold sea water tank, 6 is a temperature sensor I, 7 is a temperature sensor II, 8 is a water level sensor I, 9 is a temperature sensor III, 10 is a water level sensor II, 11 is a controller, 12 is an actuator, 13 is an electromagnetic three-way valve I, 14 is a temperature sensor IV, 15 is a flow meter, 16 is a culture pond, 17 is a water level sensor III, 18 is a temperature sensor V, 19 is a solar heat collector, 20 is an electromagnetic three-way valve II, 21 is an electromagnetic valve III, 22 is an electromagnetic valve IV, 23 is an electromagnetic three-way valve III, 24 is an electromagnetic three-way valve IV, 25 is a temperature sensor VI, 26 is a heat storage system, 27 is a circulating pump I, 28 is a circulating pump II, 29 is a heat-conducting oil heater, 30 is an electromagnetic three-way valve VI, 31 is an electromagnetic three-way valve VI, 331 is a tank body, 332 is an outer shell, 333 is a heater, 34 is a coil heat storage container, 341 is an outer shell of the coil heat storage container, and 342 is an inner shell of the coil heat storage container.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the solar gradient phase change heat storage and release system for seawater industrial aquaculture provided by the invention comprises a hot seawater tank 4, a solar thermal collector 19 and a heat storage system 26, wherein the hot seawater tank 4 is communicated with an aquaculture pond 16 through a water supply pipeline, the heat storage system 26 is connected with a heat exchanger arranged in the hot seawater tank 4 through a heat supply circulating pipeline, and a circulating pump I27 is arranged on the heat supply circulating pipeline to form a first heat supply mode; the solar heat collector 19 is connected to the heat supply circulation pipeline and is connected in parallel with the heat storage system 26 to form a first heat storage mode, and the solar heat collector 19 can directly provide heat energy for the hot seawater tank 4 through the heat supply circulation pipeline to form a second heat supply mode.

Further, a circulating pump II 28 and a heat conduction oil heater 29 are connected to the heat supply circulating pipeline, the circulating pump II 28 and the heat conduction oil heater 29 are connected in series and are connected with the heat storage system 26 in parallel, the heat conduction oil heater 29 stores heat through the heat storage system 26 to form a second heat storage mode, and the heat conduction oil heater 29 can directly provide heat energy for the hot sea water tank 9 to form a third heat supply mode. The two ends of the heat storage system 26 are respectively provided with an electromagnetic valve III 21 and an electromagnetic valve IV 22.

The switching among the first heat supply mode, the second heat supply mode, the third heat supply mode, the first heat storage mode and the second heat storage mode is controlled by matching a plurality of electromagnetic three-way valves on the heat supply circulating pipeline.

A temperature sensor I6, a temperature sensor II 7 and a water level sensor I8 are arranged in the hot sea water tank 4, wherein the temperature sensor I6 and the temperature sensor II 7 are respectively used for detecting the temperature of high-level and low-level sea water in the hot sea water tank 4. In the embodiment of the present invention, the hot seawater tank 4 is made of polypropylene.

Further, a solar energy gradient phase change heat storage and release system for seawater industrial aquaculture further comprises a cold sea water tank 5 connected with the hot sea water tank 4 in parallel, water outlets of the hot sea water tank 4 and the cold sea water tank 5 are connected through water mixing equipment, the water mixing equipment is connected with a water supply pipeline, a temperature sensor III 9 and a water level sensor II 10 are arranged in the cold sea water tank 5, a temperature sensor IV 14 and a flow meter 15 are arranged on the water supply pipeline, and a water level sensor III 17 and a temperature sensor V18 are arranged in a culture pond 16.

The water replenishing pipe of the hot sea water tank 4 is provided with an electromagnetic valve I2, the water replenishing pipe of the cold sea water tank 5 is provided with an electromagnetic valve II 3, the water replenishing pipes of the hot sea water tank 4 and the cold sea water tank 5 are both connected with a main water replenishing pipe, and the main water replenishing pipe is provided with a water inlet valve 1. The temperature of the water for cultivation is adjusted through the intelligent water mixing equipment.

In the embodiment of the invention, the heat exchanger in the hot sea water tank 4 is a titanium plate heat exchanger, and the titanium plate heat exchanger is purchased from Shandong Linyi Tuotong Heat exchange equipment Co., Ltd, and has the model of TDM 026-80-20E.

As shown in fig. 2, the heat storage system 26 includes a plurality of heat storage and release units connected in parallel and having different heat storage temperatures, and each heat storage and release unit is controlled by a solenoid valve. Each group of heat accumulating and releasing units includes a plurality of heat storage tanks 33 connected in series.

The thermal storage system 26 also includes a coil thermal storage vessel 34 connected in parallel with the heat storage and release unit.

As shown in fig. 3 to 4, the jacketed heat storage tank 33 includes a tank 331 filled with a phase change material therein and a shell 332 disposed outside the tank 331, an annular space for passing the medium oil is provided between the shell 332 and the tank 331, and a heater 333 for heating the medium oil is provided at the bottom of the shell 332.

The annular gap between the shell 332 and the tank 331 is 1-2mm, so that the turbulent flow area is reduced, the flow velocity of the medium oil is accelerated, and the heat exchange efficiency is improved.

The shell 332 is made of carbon steel, the thickness of the shell is 2mm, the heat conducting performance is excellent, and an interlayer with the thickness of 1mm-2mm is arranged between the inner layer and the outer layer, and heat conducting oil passes through the interlayer during working. The electric heater 333 facilitates heat storage by electric energy under special circumstances. The oil inlet and outlet of the jacketed heat storage tank 33 generally select two diagonal lines for heat exchange.

The end of the tank 331 is provided with a teflon or rock wool gasket to ensure that the internal material is not leaked and can bear a certain steam pressure, and the inside is completely treated by enamel to prevent the phase change material from corroding the carbon steel. Strict quality control is required to ensure that all internal parts of the enamel are treated.

As shown in fig. 5, the coil heat storage container 34 includes an inner coil heat storage container shell 342 with a copper coil inside and an outer coil heat storage container shell 341 disposed outside the inner coil heat storage container shell 342, and an annular cavity for filling a heat insulating material is formed between the outer coil heat storage container shell 341 and the inner coil heat storage container shell 342. The coil heat storage container inner shell 342 is filled with a phase change material, in the embodiment of the present invention, the phase change material is aluminum ammonium sulfate dodecahydrate.

In order to solve the corrosion problem of the copper coil pipe and the ammonium aluminum sulfate dodecahydrate, a coating integrating the functions of corrosion resistance and high heat conductivity is used on the outer side of the copper coil pipe, and the coating is constructed with the assistance of a Weifang Shengdefu novel material research institute.

In the embodiment of the present invention, the heat storage system 26 includes six sets of heat storage and release units, and the first five sets of heat storage and release units include four heat storage tanks 33 with a jacketed structure, and the capacity is about 45L, and the total amount of each heat storage unit is 180L. A temperature sensor is arranged at the interlayer in each heat storage tank 33 to test the temperature of the approximate phase change material; the last group of heat storage and release units comprises a polypropylene double-layer coil pipe heat storage container with the total capacity of 180L, and the design purpose of the group of heat storage and release units is to test the data of the two heat storage containers in the aspects of heat transfer efficiency and the like. Two temperature sensors are arranged in the polypropylene double-layer coil heat storage container and used for testing the temperature of the phase-change materials at two positions.

The fill material in the thermal storage tank 33 is three in number:

the first method comprises the following steps: the phase change material is a 90-degree phase change composite material, and the aluminum ammonium sulfate dodecahydrate is more than 90% in mass percentage; and the second method comprises the following steps: the phase change material comprises a 80-degree phase change composite material and a barium hydroxide octahydrate composite phase change material, wherein the barium hydroxide octahydrate comprises more than 90% by mass; and the third is that: the phase change material comprises a 60-degree phase change composite material and a sodium acetate trihydrate composite phase change material, wherein the mass percentage of the sodium acetate trihydrate is more than 90%.

The specific gradient arrangement of the thermal storage system 26:

from left to right, from top to bottom, high phase transition temperature to low phase transition temperature

The 180L heat storage container A is filled with only one material: the aluminum ammonium sulfate dodecahydrate composite phase-change material.

The gradient phase change heat storage and release system adopts phase change materials with different phase change temperatures in a solar heat source range, can utilize heat sources with different temperature conditions to the maximum extent, and maximizes the solar energy utilization efficiency.

In the embodiment of the invention, the solar heat collector 19 adopts a metal tube type intermediate-temperature solar heat collecting plate; the system heat preservation design is outer heat preservation, and the heat preservation adopts polyurethane or rock wool heat preservation layer to add the aluminium foil face according to different demands.

The working principle of the invention is as follows:

after the heat source is collected, the heat conducting oil in the solar heat collector 19 heats the heat storage system 26, and the heat is stored in the heat storage tank 33 in the heat storage system 26. For the convenience of utilization, the heat obtained by the solar heat collector 19 can be directly used for heating the seawater in the hot seawater tank 4 according to the requirement by a control command. The heat stored in the heat storage system 26 is transferred to the hot sea water tank 4 through heat conducting oil, and the heat exchanger adopts a titanium plate type heat exchanger, so that the heat exchange efficiency in the heat peak input period is improved. The hot seawater in the hot seawater tank 4 and the seawater in the cold seawater tank 5 are directly supplied to the culture pond 16, and cold water is heated to a required temperature by adopting a cold-hot water proportional mixing device.

The system operation is designed into three cycles:

1. the first heat storage mode, the circulation between the solar collector-heat storage system, is adapted to when the user demand is temporarily met, the temperature of the hot sea chest 4 is greater than the temperature of the culture pond 16. The solar energy is stored in the thermal storage system 26. (the heat of the thermal storage system 26 can also be supplied to the solar collector 19 in the opposite direction if necessary, and the solar collector 19 can be covered with snow in winter to remove the snow)

2. A first heating mode, a thermal storage system-hot sea chest cycle. When the temperature of the solar heat collector 19 is less than 30 ℃, the temperature of the hot sea water tank 4 is less than the temperature of the culture pond 16, the temperature of all temperature measuring points of the heat accumulation and release unit is greater than the temperature of the hot sea water tank 4, and the heat stored in the heat accumulation and release unit is used for heating the sea water.

3. In the second heat supply mode, circulation is performed between the solar heat collector and the hot sea water tank, and the solar heat of the solar heat collector 19 directly heats the sea water in the hot sea water tank 4.

In order to ensure the safe operation of the system, a heat-conducting oil heater 29 is additionally arranged in the system design so as to ensure that the system can replace the solar heat collector 19 to supply heat to the system when sunlight does not exist and ensure the normal operation of the system and a user using heat. The three above-mentioned cycles can also be achieved with a conduction oil heater, namely: in the second heat storage mode, circulation is performed between the heat conduction oil heater and the heat storage system; in the third heat supply mode, circulation between the heat conduction oil heater and the hot seawater tank 4 is realized; and (3) circulation between the heat conduction oil heater and the solar heat collector to ensure system operation under special conditions.

The circulation path and the realization method of the invention are as follows:

and (3) starting a system: when the outlet temperature of the solar heat collector 19 is less than 30 ℃, the heat collection cycle is not started; when the outlet temperature of the solar heat collector 19 is higher than 30 ℃, the system is started, and the solar heat-conducting oil circulating pump is started.

Solar collector-thermal storage system cycle, first thermal storage mode: and closing the circulating pump I27 and the circulating pump II 28, and opening the electromagnetic valve III 21 and the electromagnetic valve IV 22. Manually selecting 1 group or a plurality of groups of heat storage and release units in the heat storage unit group, after being manually started, automatically operating according to a control flow, namely, connecting 1 group or n groups of heat storage and release units in parallel as a heat storage system to exchange heat with a heat collector, wherein the circulation direction is anticlockwise, and the principle that a hot oil inlet is one side of a phase-change material with high phase-change temperature is followed

Heat storage system-hot sea water tank circulation, first heat supply mode: closing an oil pump of a solar heat collector, closing a circulating pump II 28 (an electric heater oil pump), opening a circulating pump I27, opening an electromagnetic valve III 21 and an electromagnetic valve IV 22, closing an electromagnetic three-way valve IV 24, manually selecting 1 group or a plurality of groups of heat storage and release units in a heat storage system 26, and automatically operating according to a control flow after manually opening, namely connecting 1 group or n groups of heat storage and release units in parallel as a heat storage system to exchange heat with a hot sea water tank, wherein the circulating direction is anticlockwise, and the principle that a cold oil inlet is one side of a low-phase-temperature-change phase-change material is followed

Solar collector-hot sea water tank circulation, second heating mode: after the solar heat collector 19 is started, the electromagnetic valve III 21, the electromagnetic valve IV 22 and the circulating pump II 28 are closed, the circulating pump I27 is opened, two temperature points of the hot seawater tank 4 are detected, and when any one of the two temperature points is greater than 80 ℃, the circulation is stopped.

A heat conduction oil heater-heat storage system circulation, and a second heat storage mode: the method comprises the following steps that the outlet temperature of a solar thermal collector is required to be lower than 30 ℃, an oil pump of the solar thermal collector is closed, a circulating pump I27 is closed, a circulating pump II 28 is started, a heat conduction oil heater 29 (an electric heating boiler) is started, an electromagnetic valve III 21 and an electromagnetic valve IV 22 are opened, 1 group or a plurality of groups of heat accumulation and release units in a heat storage system are manually selected, after the heat accumulation and release units are manually opened, the heat accumulation and release units automatically run according to a control flow, namely 1 group or n groups of heat accumulation and release units are connected in parallel to be used as the heat exchange of the heat storage system and the

A heat conduction oil heater-hot seawater tank circulation mode, a third heat supply mode: the method comprises the steps of closing an oil pump of the solar thermal collector, opening an electromagnetic valve III 21 and an electromagnetic valve IV 22, closing all heat storage and release units (a manual mechanical valve is arranged in a heat storage pipeline) in a heat storage system, closing an electromagnetic three-way valve VI 31 and a circulating pump I27, opening a circulating pump II 28, opening a heat conduction oil heater 29 (an electric heating boiler), detecting two temperature points in a hot seawater tank 4, and stopping the circulation when any one of the temperature points is greater than 80 ℃.

Circulation of a heat conduction oil heater and a solar heat collector: when snow is accumulated in winter and other severe weather, the electromagnetic valve III 21, the electromagnetic valve IV 22, the electromagnetic three-way valve III 23 and the circulating pump I27 are closed, the hot sea water tank 4 is manually closed (a manual mechanical valve is arranged on a heat storage pipeline), the circulating pump II 28 is opened, and the heat conduction oil heater 29 is opened.

The invention takes northern cities as an example, the project has a total heat collection building area of 150 square meters, the angle of the slope of the roof is about 6.5 degrees (the height difference between the north and the south is calculated as 0.8 m), the annual energy saving cost is about 5 ten thousand yuan, and the design expected investment recovery period is about 5 years.

The invention realizes a mariculture temperature-regulating water supply scheme taking solar energy as a main heat source, innovatively designs a multi-unit multi-storage-tank gradient phase change heat storage and release system, gives consideration to the heat preservation and corrosion prevention functions, and realizes accurate collection and release of the heat source by PLC control. The heat source of the invention is not limited to solar energy, and the application of the phase-change materials with various phase-change temperatures enables the heat source to be expanded to industrial waste heat, valley electricity and the like.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.