A pressurized valley electricity heat storage device

Abstract

The present invention discloses a pressurized valley electricity heat storage device, which belongs to the technical field of valley electricity heat storage devices. It includes a heat storage tank body, a heat storage and release electric valve, a water mixer, a water mixing electric valve, a heating circulation pump, an electric vacuum hot water boiler and a heating electric valve. The top of the heat storage tank body is connected to a first connecting pipe, the bottom of the heat storage tank body is connected to a second connecting pipe, and a plurality of circular orifice plates are arranged in the heat storage tank body. By arranging a plurality of circular orifice plates at specific positions according to the height-to-diameter ratio of the heat storage tank body, the heat storage tank body is effectively reinforced to ensure the safety of the heat storage tank body structure; the openings can prevent turbulence of hot water in the heat storage tank body, forming a vertical laminar flow of high-temperature hot water from bottom to top during heat release and a vertical laminar flow of high-temperature hot water from top to bottom during heat storage, thereby ensuring temperature stratification and improving heat storage efficiency.

Description

Technical Field

[0001] The invention relates to a pressure-bearing valley electricity heat storage device, belonging to the technical field of valley electricity heat storage devices. Background Art

[0002] Valley Electricity heat storage tanks are generally square, open water tanks. To ensure hot water laminar flow, the design height is generally 4.5m, the number of water tanks is generally 1-2, and a single water tank occupies a large area. In general, large areas and regular-shaped spaces on the ground and basement of public buildings are limited, so the heat storage of open water tanks is greatly restricted by the site. The wall thickness of the stainless steel plate of the open water tank is generally 1.5-2.0mm, and it is reinforced with stainless steel square steel horizontal and vertical reinforcements. The cost is high and the reliability is poor. Cracking and leakage of the water tank are common faults. If the water tank collapses, there is a high risk of scalding from the 95°C high-temperature hot water in the water tank. Due to the high temperature of the stored water, the water tank is open, which makes the hot water circulation pump prone to cavitation. The open water tank is not pressurized and needs to be heated by a plate heat exchanger before supplying heat to the heating system. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a pressurized valley electricity heat storage device, which solves the problems in the prior art of being subject to large site constraints, easy cavitation, not pressurized, and requiring heat exchange through a plate heat exchanger before supplying heat to a heating system.

[0004] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0005] A pressurized valley electricity heat storage device comprises a heat storage tank, a heat storage and release electric valve, a water mixer, a water mixing electric valve, a heating circulation pump, an electric vacuum hot water boiler and a heating electric valve.

[0006] The top of the heat storage tank is connected to a first connecting pipe, the bottom of the heat storage tank is connected to a second connecting pipe, a plurality of circular orifice plates are arranged in parallel at different height-to-diameter ratio positions of the heat storage tank, and each circular orifice plate is provided with a plurality of openings.

[0007] The water mixer comprises a first water inlet, a second water inlet and a water outlet.

[0008] The first connecting pipe is connected to the first pipeline and the second pipeline, the second connecting pipe is connected to the third pipeline and the fourth pipeline, the water mixing electric valve is arranged on the first pipeline, the heating electric valve is arranged on the second pipeline, the heating circulation pump is arranged on the third pipeline, the first water inlet of the water mixer is connected to the first connecting pipe through the first pipeline, the electric vacuum hot water boiler is connected to the second connecting pipe through the second pipeline, the second water inlet of the water mixer is connected to the fourth pipeline through the fifth pipeline, the connection between the fourth pipeline and the fifth pipeline is connected to the water inlet pipe, and the water outlet of the water mixer is connected to the water outlet pipe.

[0009] Preferably, the opening on the circular orifice plate is in an octagonal shape.

[0010] More preferably, the openings expand outward from the center of the circular orifice plate in one circle, the distance between each adjacent circle of openings decreases step by step, the number of openings in each adjacent circle increases successively, and the spacing between two adjacent openings on the same circle decreases gradually.

[0011] Preferably, a first electric valve is provided on the first connecting pipe, and a second electric valve is provided on the second connecting pipe.

[0012] Preferably, a third electric valve is provided on the water inlet pipe, and a fourth electric valve is provided on the water outlet pipe.

[0013] Preferably, the heat storage tank and the electric vacuum hot water boiler both adopt a pressure-bearing design.

[0014] The beneficial effects of the present invention are:

[0015] The present invention provides a pressurized valley electricity heat storage device, which effectively reinforces the heat storage tank body by arranging a circular orifice plate to ensure the safety of the heat storage tank body structure; the openings can prevent turbulence of hot water in the heat storage tank body, forming a vertical laminar flow of high-temperature hot water from bottom to top during heat release and a vertical laminar flow of high-temperature hot water from top to bottom during heat storage, thereby ensuring temperature stratification and improving heat storage efficiency; the pressure-bearing design is adopted, so that when the heat storage device is connected to the heating system, no intermediate heat exchange link is required, the heat storage temperature difference is improved, the height of the heat storage tank body is reduced, and it can be flexibly arranged according to actual on-site conditions, reducing site restrictions; the water system formed by the device is a closed system with better water quality, so that the hot water circulation pump has no cavitation risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the structure of the first circular orifice plate or the second circular orifice plate.

[0018] Figure 3 It is an enlarged view of the opening on the first circular orifice plate or the second circular orifice plate.

[0019] In the figure: 10, heat storage tank body; 11, first circular orifice plate; 12, second circular orifice plate; 13, opening; 21, heat storage and release electric valve; 22, water mixer; 23, water mixing electric valve; 24, heating circulation pump; 25, electric vacuum hot water boiler; 26, heating electric valve; 27, temperature sensor; 28, first connecting pipe; 29, second connecting pipe; 30, first pipeline; 31, second pipeline; 32, third pipeline; 33, fourth pipeline; 34, fifth pipeline; 35, water inlet pipe; 36, water outlet pipe; 37, first electric valve; 38, second electric valve; 39, third electric valve; 40, fourth electric valve. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0021] It should be noted that the solid double-headed arrows in the drawings indicate the flow direction of high-temperature hot water when the water system releases heat, and the linear double-headed arrows indicate the flow direction of high-temperature hot water when the water system stores heat.

[0022] Embodiment 1:

[0023] See also Figure 1-3 The present embodiment provides a pressurized valley electricity heat storage device, comprising a heat storage tank 10, a heat storage and release electric valve 21, a water mixer 22, a water mixing electric valve 23, a heating circulation pump 24, an electric vacuum hot water boiler 25, and a heating electric valve 26. In addition, 10 temperature sensors 27 are evenly arranged on the vertical surface of the heat storage tank 10, and the valley electricity heat storage device has an intelligent control system.

[0024] The heat storage tank 10 and the electric vacuum hot water boiler 25 are both of pressure-bearing design.

[0025] The top of the heat storage tank body 10 is connected to a first connecting pipe 28 , and the bottom of the heat storage tank body 10 is connected to a second connecting pipe 29 .

[0026] A plurality of circular orifice plates are provided in the heat storage tank body 10, and the circular orifice plates are arranged parallel to each other at positions of different height-to-diameter ratios of the heat storage tank body 10. According to the height-to-diameter ratio of the heat storage tank body 10, the structure of the circular orifice plates is arranged at specific positions. On the one hand, the structural strength is improved to ensure the pressure-bearing capacity. On the other hand, the shape and distribution density of the circular orifice plates are adjusted to suppress heat convection and ensure the temperature stratification effect required for heat storage. Specifically, a first circular orifice plate 11 is provided at one-third of the height of the heat storage tank body 10, and a second circular orifice plate 12 is provided at two-thirds of the height of the heat storage tank body 10, wherein the first circular orifice plate 11 and the second circular orifice plate 12 are the same, and are both provided with a plurality of openings 13, wherein the openings 13 on the first circular orifice plate 11 are distributed in a circular shape and there are a plurality of them, and they are all concentric with the first circular orifice plate 11, and the openings 13 on the second circular orifice plate 12 are distributed in a circular shape and there are a plurality of them, and they are all concentric with the second circular orifice plate 12. On the one hand, it can effectively store heat and strengthen the tank body, ensuring the structural safety of the heat storage tank body 10; on the other hand, it can prevent hot water turbulence in the heat storage tank body 10, forming a vertical laminar flow of high-temperature hot water from bottom to top during heat release and a vertical laminar flow of high-temperature hot water from top to bottom during heat storage, thereby inhibiting heat convection, ensuring temperature stratification, and improving the heat storage effect.

[0027] The water mixer 22 includes a first water inlet, a second water inlet and a water outlet.

[0028] The first connecting pipe 28 is connected with the first pipeline 30 and the second pipeline 31, the second connecting pipe 29 is connected with the third pipeline 32 and the fourth pipeline 33, the water mixing electric valve 23 is arranged on the first pipeline 30, the heating electric valve 26 is arranged on the second pipeline 31, the heating circulation pump 24 is arranged on the third pipeline 32, the first water inlet of the water mixer 22 is connected with the first connecting pipe 28 through the first pipeline 30, the electric vacuum hot water boiler 25 is connected with the second connecting pipe 29 through the second pipeline 31, the second water inlet of the water mixer 22 is connected with the fourth pipeline 33 through the fifth pipeline 34, the connection between the fourth pipeline 33 and the fifth pipeline 34 is connected with the water inlet pipe 35, the water inlet pipe 35 is connected to the heating system for heating return water, the water outlet of the water mixer 22 is connected with the water outlet pipe 36, the water outlet pipe 36 is connected to the heating system for heating water supply, so that the water system of the device forms a closed system, the water quality in the device is better, the hot water circulation pump has no cavitation risk, and has a long service life.

[0029] This device can be directly incorporated into the central air conditioning heating water system without the need for a plate heat exchanger. High-temperature hot water can be directly mixed with heating return water for heating. The heating return water directly enters the heat storage tank 10. The heat storage temperature of the hot water in the heat storage tank 10 is 95°C during the valley period, and drops to 35°C after heat release during peak and normal periods. The temperature difference between the inlet and outlet water of the heat storage tank 10 is as high as 60°C. The heat storage temperature difference is larger, and the heat storage capacity of the same volume is increased by 20% compared with the open water tank. The heat storage capacity is stronger, and the height requirement of the heat storage tank 10 to prevent hot water turbulence is reduced. The height is only 80% of that of an ordinary open water storage tank. It occupies a small area and can be flexibly arranged according to the actual situation on site.

[0030] In a preferred embodiment, a first electric valve 37 is provided on the first connecting pipe 28 , a second electric valve 38 is provided on the second connecting pipe 29 , a third electric valve 39 is provided on the water inlet pipe 35 , and a fourth electric valve 40 is provided on the water outlet pipe 36 .

[0031] The openings 13 on the first circular orifice plate 11 and the second circular orifice plate 12 are octagonal in shape. Figure 3 .

[0032] The openings 13 on the first circular orifice plate 11 expand outwards from the center of the first circular orifice plate 11 by one circle, and the distance between the openings 13 of each adjacent circle is gradually reduced, the number of the openings 13 of each adjacent circle is increased successively, and the distance between the adjacent openings 13 on the same circle is gradually reduced;

[0033] The openings 13 on the second circular orifice plate 12 expand outward one circle with the center of the second circular orifice plate 12, and the distance between each two adjacent circles of openings 13 gradually decreases, the number of openings 13 in each two adjacent circles increases successively, and the distance between two adjacent openings 13 on the same circle gradually decreases.

[0034] The first circular orifice plate 11 and the second circular orifice plate 12 are orifice plates with the same structure. Taking the heat storage tank body 10 with a diameter of 2800 mm and a height of 3600 mm as an example, the position, number and spacing of the openings 13 are designed as follows:

[0035] (1) Position of the opening 13 on the orifice plate:

[0036] With the center of the orifice plate expanding outwards for each circle, the distance between the openings 13 of two adjacent circles is gradually reduced, that is, the outward expansion distance is gradually reduced:

[0037] R1 = 36.0 mm;

[0038] R2 = R1 + R1 * 0.985 = 71.5 mm;

[0039] R3=R2+R1*0.985 2 =106.4mm;

[0040] R n =R n-1 +R1*0.985 (n-1) mm;

[0041] R n It is the distance from the center of the hole 13 to the center of the orifice plate on the nth circle of the expansion.

[0042] Note: If R n -R (n-1) If the calculated value is less than 20mm, take it as 20mm.

[0043] (2) Number of holes 13 on the orifice plate:

[0044] With the center of the orifice plate expanding outwards one circle, the number of openings 13 in each adjacent circle increases successively:

[0045] N1=8;

[0046] N n =8*n.

[0047] (3) Spacing of the openings 13 on the orifice plate:

[0048] With the center of the orifice plate expanding outwards for each circle, the distance between two adjacent openings 13 on the same circle gradually decreases:

[0049] D1=2*3.14159*R1 / N1=28.3mm;

[0050] D2=2*3.14159*R2 / N2=28.1mm;

[0051] D n =2*3.14159*Rn / N n mm;

[0052] D n It is the length of the positioning arc between the centers of adjacent holes on the nth circle of expansion.

[0053] Note: If D n If the calculated value is less than 20mm, take it as 20mm.

[0054] The working principle of a pressurized valley electricity heat storage device provided in this embodiment is as follows:

[0055] a) Mode 1, off-peak period, only heat storage: turn on the electric vacuum hot water boiler 25, the heating circulation pump 24, the heating electric valve 26, and the heat storage and release electric valve 21 to store heat in the heat storage tank; after the temperature reaches 95°C, stop heat storage, and turn off the electric vacuum hot water boiler 25, the heating circulation pump 24, the heating electric valve 26, and the heat storage and release electric valve 21.

[0056] b) Mode 2, off-peak period, heat is supplied while storing heat: the electric vacuum hot water boiler 25, the heating circulation pump 24, the heating electric valve 26, and the heat storage and release electric valve 21 are turned on to store heat in the heat storage tank; after the temperature reaches 95°C, heat storage is stopped and the heat storage and release electric valve 21 is closed; the water mixing electric valve 23 is turned on and the opening of the water mixing electric valve 23 is adjusted according to the actual heating load to supply heat to the central air-conditioning system.

[0057] c) Mode 3, during peak and normal periods, the heat storage device provides heating: turn off the electric vacuum hot water boiler 25, the heating circulation pump 24, and the heating electric valve 26, turn on the heat storage and release electric valve 21 and the water mixing electric valve 23, and adjust the opening of the water mixing electric valve 23 according to the actual heating load to supply heat to the central air conditioning system. When the temperature reaches 35°C, stop the heat storage device from providing heating.

[0058] d) Mode 4, during peak and normal periods, the electric vacuum hot water boiler 25 supplies heat: turn on the electric vacuum hot water boiler 25, the heating circulation pump 24, the heating electric valve 26, and the mixing water electric valve 23, close the heat storage and release electric valve 21, and adjust the opening of the mixing water electric valve 23 according to the actual heating load to supply heat to the central air-conditioning system.

[0059] e) Ten temperature sensors 27 are evenly arranged on the vertical surface of the heat storage tank 10 to monitor the heat storage and heat release process of the heat storage device.

[0060] f) The intelligent control system automatically operates in modes 1, 2, 3, and 4 according to the set peak, flat, and valley time periods and the set central air-conditioning operating time periods.

[0061] g) The intelligent control system predicts the load based on historical operation data and outdoor ambient temperature and humidity, and determines the heating capacity of the heat storage device during peak and normal periods. If the evaluation result shows that the heating demand during peak and normal periods cannot be fully covered, the system operation mode will be automatically adjusted to ensure that the heat storage device is used for heating during peak periods, and the electric vacuum hot water boiler is used for heating during normal periods.

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pressurized valley electricity heat storage device, characterized in that: It includes heat storage tank, heat storage and release electric valve, water mixer, water mixing electric valve, heating circulation pump, electric vacuum hot water boiler and heating electric valve. The top of the heat storage tank is connected to a first connecting pipe, the bottom of the heat storage tank is connected to a second connecting pipe, a plurality of circular orifice plates are arranged in parallel at different height-to-diameter ratio positions of the heat storage tank, and each circular orifice plate is provided with a plurality of openings. The water mixer comprises a first water inlet, a second water inlet and a water outlet. The first connecting pipe is connected to the first pipeline and the second pipeline, the second connecting pipe is connected to the third pipeline and the fourth pipeline, the water mixing electric valve is arranged on the first pipeline, the heating electric valve is arranged on the second pipeline, the heating circulation pump is arranged on the third pipeline, the first water inlet of the water mixer is connected to the first connecting pipe through the first pipeline, the electric vacuum hot water boiler is connected to the second connecting pipe through the second pipeline, the second water inlet of the water mixer is connected to the fourth pipeline through the fifth pipeline, the connection between the fourth pipeline and the fifth pipeline is connected to the water inlet pipe, and the water outlet of the water mixer is connected to the water outlet pipe; The openings are centered on the circular orifice plate, and each time they expand outwards, the distance between the openings of each adjacent circle is gradually reduced, the number of openings of each adjacent circle is increased successively, and the distance between the adjacent openings on the same circle is gradually reduced; the position of the openings (13) on the orifice plate is: With the center of the orifice plate expanding outwards one circle at a time, the distance between the openings (13) of two adjacent circles is gradually reduced, that is, the outward expansion distance is gradually reduced; R n = R n-1 + R1*×0.985 （n-1） mm; R n is the distance from the center of the hole (13) to the center of the orifice plate on the nth circle of the expansion; Number of holes (13) in the orifice plate: With the center of the orifice plate expanding outwards, the number of openings (13) between two adjacent circles increases successively; N n =8×n; Spacing of the holes (13) on the orifice plate: With the center of the orifice plate expanding outwards, the distance between two adjacent openings (13) on the same circle gradually decreases; D n =2×3.14159× R n / N n mm; D n It is the length of the positioning arc between the centers of adjacent holes on the nth circle of expansion.

2. A pressurized valley electricity heat storage device according to claim 1, characterized in that: The shape of the opening on the circular orifice plate is an octagon.

3. A pressurized valley electricity heat storage device according to claim 1, characterized in that: The first connecting pipe is provided with a first electric valve, and the second connecting pipe is provided with a second electric valve.

4. The pressurized valley electricity heat storage device according to claim 1, characterized in that: The water inlet pipe is provided with a third electric valve, and the water outlet pipe is provided with a fourth electric valve.

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